I-joist span standards make them a stiffer floor. But the attic truss idea is a good one too. Re: Pergola beam span Your 2x10 joists will certainly support the 2x8s without an issue as there is no deck, therefore no surface load. It is possible to build with wider spacing. 44 kPa) and the design dead load does not exceed 20 pounds per square foot (0. Listed are 46 tables based on common loading conditions for floor joists, ceiling joists and rafters. " These joist span tables and cantilever allowances might be old news to those familiar with DCA 6 ( awc. Rather than removing the joist all together, just adding a second 2x8 should be more than adequate. Douglas Fir-Larch lumber is some of the strongest. These double 2x10's will only be taking the code required Live Load=30 psf and Dead Load=10 psf, correct? No roof loads will be carried by these floor joist, correct? JACUSTOMER-7u8tkca7- : No roof loads is correct. This is where I have my open span. This architectural element –related article is a stub. , and 24 in. Joist hangers: Joist hangers are required wherever joists do not have at least 1½ inch of bearing. 0 Fb 1,700 E 1. For engineered rim joists, the manufacturer's recommendations govern. Filler blocking 1⁄ 8" gap. 4X8: 8 feet. The Uniform Design Live Load is 78 plf and the Uniform Design Dead Load is 30 plf. Elevations vs. Figure 4 Cost comparisons of floor constructions Each I-joist brand has specific strength char-. Depending on deck size and joists span, you can either use 2x8 or 2x10 floor joists. Types: Parallel Chord, Single Pitch, Double Pitch; Under slung or Bottom Chord Bearing. 2x10 floor joists @ 16” o. Regardless, 2x8's are too small for the floor joist without a beam. The joists are 2X6 @ 2' centers, covered with 3/4" ply and GacoDeck sealer. A triple 2x6 beam over a span of 10’ feet should be more than sufficient for normal deck loads. ALLOWABLE SPANS FOR DF #2 ROOF RAFTERS Dead Load = 10 psf & Includes Maximum Roofing Material Load = 6 psf (Built-up or Composition Shingle Roofing) Live Load = 20 psf ALLOWABLE SPANS FOR DF #2 CEILING JOISTS Dead Load = 10 psf Live Load = 10 psf RAFTER SIZE SPACING ALLOWABLE SPAN JOIST SIZE SPACING ALLOWABLE SPAN 2x6 24” 16” 12”. 2x8 for joists will be fine, with 16" OC. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on-center (o. 2-1/2" x 11-1/4" F/D joists @ 16"o. 50 sq ft Transom Window in Single Door $70. Another option is to use double 4x6's stacked on edge to get additional support. A double 2x10 could never carry the load across a 10' span for a 2nd floor, its furniture and people, the ceiling above and any attic storage that is being used on those ceiling joists. This is for "light" storage in the attic with a snow load for west TN figured in. Maximum spans are measured centerline to centerline of bearing and are based on uniformly loaded joists. I’m about ready to use the commercial product, “Squeeeeek No More” (Home Depot, etc. 2 2412 91⁄ 29 178-019 158-079 148-099 138-109 188-079 178-009 158-079 138-119 7GPI 20 11 ⁄. 1 NonDense No. If the situation allows, a 2x6 bearing wall (running under the sistered joist and a couple others) would be optimal and cost effective, spreading the load across the slab MUCH better than a point load distributed over 16 sq. The narrow double lines show the floor joist themselves. bridging specified double rim joists parallel with ex terior/ interior load bearing walls 5/8" gypsum board ceilings finished 11 crawlspace floor 2" concrete skim coat on 6mil poly vb min 6" compacted granular fill 12 garage floor 4" concrete slab. Do I need to add in the starting joist (the one attached to the wall) too? making 13 joists? I'm thinking that I do. Engineered Wood Products –I-Joists, Glulam, and LVL (laminated veneer lumber) wood products. GIRDER SPANS AND HEADER SPANS FOR EXTERIOR BEARING WALLS (Maximum spans for Douglas fir-larch, hem-fir, southern pine and spruce-pine-fir and required number of jack studs) Ground Snow Loads Ground Snow Loads 50 50 20 28 36 20 28 36 Girders and Headers Supporting Size Span NJ* Span NJ* Span NJ* Girders and Headers Supporting Size. 16 foot span with joists 16 inches on center. What I wanted to do was compare these numbers/spans to that of ordinary 2x12 lumber. Therefore, the span is 12'. Let's expand our house beyond that 17'2" span capability to 24 feet wide. The floor above will be stiffest if you place the wall in the middle of the joists. (192" X 16") / 144 = 21. The illustrations (one for cantilever joists and one for flush rim-beam hung joists) point out where joist span measurements are taken from — the saddle of the ledger mounted joist hanger to the center of a dropped beam or saddle of the. Decide whether the joists will cantilever over or not. 2x8 2x10 Indi e the distance for the joist span. Hi all! Hoping someone can answer this for me. Lumber Species Southern Pine Douglas Fir Douglas Fir-Larch Hemlock-Fir Spruce-Pine-Fir Redwood Western Cedar Ponderosa Pine Red Pine. Load will be of a typical wood working shop, heaviest items will be a lathe and table saw. These span tables are taken from the National Building Code of Canada, 1998 BC Edition (current edition) and are for reference only. Beam Span: The distance between posts 3. Maximum Spans. A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on. The wood side pieces provide lateral support to the slender steel flitch plate and brace the. NuBIM Vulcraft Plug-In For Tekla Structures; NuBIM Vulcraft Add-In For Revit Software; BIM Execution Plan; BIM Glossary ; Special Products. 3" minimum ceiling joist- lap @ bearing wallw/nails per rafter wall section: raised floor construction 2x blocking @ 8'-0" oc for joist spans over 8'-0" poured conc. By building a wall under joists, you divide the span. See diagram. 6) *Indicates multiple single spans, do not make joists continuous over beam KEYNOTES: (8) -Support joists at house with ledger to match joist, but not less than. You will have to double up each joist (the full span of bathroom) you cut through, this is recommended to give additional strength and you will glue and screw or power nail new joist material on. Below is a helpful chart that provides actual notch and hole size limitations for 2x4, 2x6, 2x8, 2x10 and 2x12 joists. This allows you to install a supporting post off the double floor joist to hold a second storey or a roof beam. Joist Substitute A structural member which is intended for use at very short spans (10 feet or less) where open web steel joists are impractical. We have the expertise to help you determine the optimal structural steel building system for your application. That leaves several options: Assuming a 30 Live/10 Dead (sleeping areas/attics) 2x10 at 12" OC = 19'-10" span. Both on 16" centers. Then using the lumber size of joists and the joist spacing, determine if you are within the maximum allowable joist span. The widest span in the floor joist span table in Part 2 of this tutorial module showed that floor joists can span 17'2" if they are 2 X 12s spaced 12" o. You also need extra joists for where partitions are parallel to the joists. A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on. Therefore, the span is 12'. A lot has to do with what your storing up there and the size of the ceiling joists we know they are 24 inches apart. The house is 25 years old with 2 cell cinder blocks, sill plate, 2x10 joists 16" on center. 1 Courtesy of American Wood Council - Leesburg, VA Joist Span (L ≤ L J) See Table 1 Page 5. They hand cut and fit this lumber together into a roof or floor system. For a clear span of up to 14 ft, 2x10's will be OK, up to 20 ft. Engineer specs for the ceiling of my 20x24 shop were for 2x8's on 16" centers with a double 24' - 14" LVL down the center all free span (no columns in occupied space). If they are bedrooms ONLY you can use 30# live load. The 2x10" Joists for this assembly are Construction- Grade Douglas Fir, installed 16" o. joists – double if header more than 4’ span Use hangers if header spans more than 6’ Lap joists 3” min Rim or band joist Tail joists must be supported by hangers at the header if the span exceeds 12’ TYPICAL FLOOR FRAMING Joists 16, 19. All uniform loads on sub floor shall be transferred safely to joists. (I prefer to double the outside joists, as do some deck builders, which adds 2 joists, for a total of 11. All Second Floors are 5/8” Plywood. Beam and Joist Span Tables Built-Up Wood Floor Beams Supporting One Floor in a House Maximum Spans for Uniformly Distributed Loads Species and Grade Supported Built Up Beam Size Joist Length 3-2X8 4-2X8 3-2X10 4-2X10 3-2X12 4-2X12 8 9-8 11-2 11-10 13-8 13-8 15-10 10 8-8 10-0 10-7 12-2 12-3 14-2. (on center). Repeat on back side of double joist. Will a guardrail be provided for. A wood or steel girder can be laid into the foundation across the long dimension, splitting the short dimension in half. When installing a plywood subfloor on top of the slab at grade, the. Total load, 60 pounds per square foot. Timber I-joists - PDF4PRO PDF - The use of timber engineered structural Timber floor joist products are under span (m) cost (£/m2) beam and block sawn sw C16. For example: a floor joist appropriately selected to span 10 feet with an L/360 limit will deflect no more than 120″/360 = 1/3 inches under maximum design loads. Load will be of a typical wood working shop, heaviest items will be a lathe and table saw. see approved site plan for approved deck overall dimensions. Dan Cavallari Last Modified Date: August 09, 2020. True floor joist span calculations can only be made by a structural engineer or contractor. Floor Assemblies-- floor joists and floor trusses 2x6 Joists 2x8 Joists 2x8 Joists 16" on center 1st fl 2x10 Joists 2x10 Joists 12" on center 1st fl 2x10 Joists 16" on center 1st fl 2x12 Joists 2x12 Joists 12" on center 1st fl 2x12 Joists 16" on center 1st fl Add for Metal Bridging Wood Truss 8 inch Wood Truss 12 inch. I am installing an Englander 25-PDVC pellet stove in my basement. A 2x8 joist was not used for floor framing during my public experience as a builder, 2x10 was the minimum width for floor joist in house construction and the common length was 16ft per 24ft span. In typical deck construction, with a ledger on one side of the joist and beam on the other, the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above. Use appropriate. Stainless steel or hot-dip. Regardless, 2x8's are too small for the floor joist without a beam. Timber Frame –Craftsmen assemble timbers, joinery and braces together to form a self-supporting skeleton structure. Run them the 8 ft length. per square foot dead load. The problem is, inspectors (and many structural engineers, sadly) treat these as nominal framing. 2x10, 2x12, and so forth). Maximum clear span for floor joist. The vast majority of floor joist systems are built with 16" OC (on center) spacing. To size joists and rafters use the Maximum Span Tables for southern yellow pine. 00; L / 360. JetJackson. Trus Joist® TJI® joists are a key part of making a high-performance floor. 2x10 spf floor joists @ 16" oc 9 1/2" tji floor system 2x2 cross bridging at mid-span unless eng. Span Calculator for Wood Joists and Rafters also available for the Android OS. Therefore, the span is 12'. Glulam Beams Roof Trusses. The plywood has been glued and screwed to the joists and the blocking. Unless your home is built on a concrete slab, where the slab is the subfloor for the first floor, the floor itself rests on floor joists. How Far Can A 2x10 Beam Span Without Support. The main reason for doubling up floor joists is to double the strength of a single floor joist. 30lbs live 10 lbs dead (living areas) 12" O. if joists are separated for pipes, block 4 ft on center maximum foundation sill plate solid blocking–see section r502. Header span > 4' Header span > 6' Tail joist > 12 Ridge board or gusset Continuous wall tie Min 1 ½" on wood 3" on conc/masonry >2x10 Block at bearing >2x12 Bridging @ 8' Double header & trimmer Hangers for header Framing anchor or ledger   Allowable Ceiling Spans Without storage With limited storage With fixed stair R802. 1) 9’ span- 2x6 joists 2) 12’ span- 2x8 joists 3) 15’ span- 2x10 joists: Girders: Can be used to reduce the span required of the joists. See our complete chart of floor joist size, span and spacing requirements before you build. The biggest benefit I-joists bring are the long span distances you can achieve. These are usually 2”x 8”, 2”x 10”, or 2”x 12” dimensional lumber, depending on the span between supports and the spacing between the joists themselves. These charts list values to 20 ft spans, but as BossHog said, the span and loading needs an engineer to detail and calculate. Table 1: Click to close window SAWN LVL POWER BEAM PARALLAM TIMBERSTRAND Doug Fir-Larch Sel. I would keep all sheets perpendicular to the joists, and alternate between a full sheet downstage and a 6' long sheet upstage, then flip 6' down/full sheet up. You can get away with only post for 4 corners, for more support you can add a post at 6 ft on 12 ft side which is a good idea as the actual floor joist will be attached to that frame. When choosing 2x6 joists, the corresponding ledger board must be a 2x8 minimum. Lumber Species Southern Pine Douglas Fir Douglas Fir-Larch Hemlock-Fir Spruce-Pine-Fir Redwood Western Cedar Ponderosa Pine Red Pine. Stainless steel or hot-dip. Using the beam span table, select your beam lumber size. The plywood has been glued and screwed to the joists and the blocking. In the absence of any code documents of deck span tables in Canada, in 2008 I compiled my span tables from many sources for decks made with Canadian. 2X10 15-4 13-3 10-10 18-0 16-1 13-5 15-5 13-9 11-3 2X12 17-9 15-5 12-7 21-9 19-0 15-4 18-5 16-0 13-0 Sample Calculations for Using Joist Span and Beam Size CASE I SOLUTION: Refer to tables for joist and beam size requirements. 2X10 2X12 Live Load: 20 psf 2X8 2X10 Dead Load 5 psf/ Live Load 10 psf 2X4 2X6 ALLOWABLE SPANS FOR DF #2 ROOF RAFTERS Light Dead Load (up to 15 psf)/ Max. LedgerLOK is a code-compliant deck ledger board to rim joist structural wood screw that can be attached with no predrilling. Proper floor joists are used for required span. 2×6 joists 24″ oc, spanning 10′. Repeat on back side of double joist. Joist: 2x10 If joists are spaced: 24" Span: 13 1/2' Decking Board Considerations Decking boards span from joist to joist. I am building a deck and will have 2x10 joists. March 11, 2011. Measure the clear span between supports and the joist height. Floor will be beefed up under the lathe. i dont want any beam sag AndrewNJ 09:27AM | 06/26/20. of achieving greater spans and supporting higher loads than built-up wood members. Live load is weight of furniture, wind, snow and more. Engineer specs for the ceiling of my 20x24 shop were for 2x8's on 16" centers with a double 24' - 14" LVL down the center all free span (no columns in occupied space). While terminology and techniques vary from region to region. How Far Can A 2x10 Beam Span Without Support. Be sure that each hanger is firmly fastened in place with hanger nails, not screws or common nails. Maximum Floor Joist Span - No. 2 Wall Bracing: MiTek USP Wall Bracing shall be used as a framing aid, and not as a substitute for structural shear wall components. If you are worried you can triple the 2x8 for the beams but double will be sufficient. Windows are supported with 2x10 headers and jacks. I can order my six 22' 3x10s and fourteen 22' 2x6s and seven 9' 6x6 posts, and get them in a week. Welcome, Guest. allowable spans' 12'- pro\ade full bearing at supports double trimmer when span exceeds 8'—0" df#i headers, allowable spans* span blocking at panel edges edge nailing (e. also available for the Android OS. Span tables for FLOOR joists at 2x8" @16"Centers /40#live load, even with the strongest Modulus of Elasticity are maxed at 12'10". A minimum design live load of _____ shall be used for the determination of the maximum allowable floor joist spans in attics that are accessed by a fixed stairway. I-Joists can be ordered with depth up to 16 inches, allowing their usage on greater spans. the deck and spa were here when my son bought the house. See Figure 11 for decking connection requirements at the rim joist. Roofing Load: 6 psf (Asphalt Shingles) ALLOWABLE SPANS FOR DF #2 CEILING JOISTS 2X6. Using the beam span table, select your beam lumber size. I-Joists are available in deeper depths than standard floor joists. They are composed of a top and bottom flange (usually a 2×4) with a piece of plywood or OSB fixed perpendicular in between. This was for a 7/12 pitch roof. A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on. Spans in this table were derived from the IRC Table R502. I need to repair/ reinforce a deck at my sons house. (on center). So YES you should be fine with triple 2x6. All of the railing posts bolted into rim board with Carriage bolts or special hardware. Beam Span: The distance between posts 3. FLOOR BEAM TABLE. Joists & Joist Girders. The outer rim will be doubled 2x10s. They don’t provide fine-tuned results. for Southern Pine. Is there a table or a way of figuring how far 2 x 8's doubled up can span? A contractor is proposing to use double 2x8's to span 15'-4" to avoid having to provide an intermediate bearing wall. The rim joists were intended to be 2x10, but a single rim joist was installed that was a 2x8. A TJI 16″ deep and spaced 16″ o. GIRDER SPANS AND HEADER SPANS FOR EXTERIOR BEARING WALLS (Maximum spans for Douglas fir-larch, hem-fir, southern pine and spruce-pine-fir and required number of jack studs) Ground Snow Loads Ground Snow Loads 50 50 20 28 36 20 28 36 Girders and Headers Supporting Size Span NJ* Span NJ* Span NJ* Girders and Headers Supporting Size. I dont have an updated code book. I-Joists are available in deeper depths than standard floor joists. subfloor - 36" Wide Stairs with Handrail - Trusses and rafters built for Northeast Snowload - 5/8" o. comloar-oists-span-chat-2012ied sanow Floor Jit Span Chart 2012 RC - Leaning com + Use an approved hanger or a 2 x 2 ledger strip on flush beams for spans greater. If they are bedrooms ONLY you can use 30# live load. double joist per detail F11 (full depth filler). When installing a plywood subfloor on top of the slab at grade, the. If your design calls for double joists, do not disrupt the regular on-center spacing. Wood I-joists (sometimes called TJI’s) resemble steel I-beams. Use appropriate. 303 are total column loads for both sections. Joists - Live load deflection is limited to L/480, total deflection is limited to L/240, where L is the span length. Joist: 2x10 If joists are spaced: 24" Span: 13 1/2' Decking Board Considerations Decking boards span from joist to joist. I just dont want to have to use 2x12's because the roof lines will not line up then with the additional 2". They don’t provide fine-tuned results. df#2 floor joists, allowable spans* 2306. Floor Joist Span Tables for various Sizes and Species of Wood. A double 2x12 will span a greater distance between support posts. I am building a deck and will have 2x10 joists. if joists are separated for pipes, block 4 ft. also available for the Android OS. dead load (weight of structure and fixed loads) 10 lbs/ft 2. JOIST CONNECTIONS • Joists sitting on bearing points shall have hurricane clips or rafter ties holding the joist down. 3Joist Span: The length of the Joist from 6’one side, to the side that connects to the Beam. You can get away with only post for 4 corners, for more support you can add a post at 6 ft on 12 ft side which is a good idea as the actual floor joist will be attached to that frame. Beam Span: The distance between posts 3. 10 ¼” square = 1 foot Allowable Joist Span if NO Cantilever. A single SYP #2 4x10 @ 17ft is listed at 87 lb/ft. My European readers will probably scoff at how lightly we build houses here, but keep in mind that our houses also cost much less to build. Size Select. These joist spans tables don't take into account the wet conditions. Hi, Did anyone noticed that table 3 (Deck Beam Span) of the DCA6-09 for sizing a deck beam is on the conservative side. Table 12 Wet-Service Floor Joists (MC>19%) – 40 psf live load, 10 psf dead load, 360 deflection. 1 mm) nails at each end. Maximum spans in feet-inches. i have tried to read a couple of span tables but, only got confused. if need be. Use a minimum of 3 8d nails for toe nailing to girder or sill. Joists are usually identified as closely spaced supporting members, such as, Roof or Floor Joists. In typical deck construction, with a ledger on one side of the joist and beam on the other, the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above. NelsonPine LVL11 Floor Joists (100x45) Floor Joists - supporting floor loads only - 40kg/m2 Joint Spacing 300 450 600 Span O/H Span O/H Span O/H DxB Maximum SINGLE span 100x45 2300 550 1850 500 1750 400 Maximum CONTINUOUS Span 100x45 3000 550 2150 500 2050 400 Floor Joists - supporting single story parallel load bearing wall and roof. You are correct; the first floor will be mostly tile, so a good sturdy floor is mandatory. 5 ft x (left span + right span) continuous span: 0. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on-center (o. What is the max span allowable for a 2x10 set @ 16" o. Both end nailing and joist retainers were used for those joists (six of them) not over the footings. While terminology and techniques vary from region to region. A double 2x10 could never carry the load across a 10' span for a 2nd floor, its furniture and people, the ceiling above and any attic storage that is being used on those ceiling joists. He replaced the 10' (2)2x12 beam with a new (2)2x12 beam spanning 20'. 44 kPa) and the design dead load does not exceed 20 pounds per square foot (0. Windows are supported with 2x10 headers and jacks. This architectural element –related article is a stub. Using 4x wood doesn't get you much additional strength. The floor joists are 2x8. 2 grade Douglas Fir-Larch wood joist. A double thickness board in the position of a rim joist is called a flush beam and serves a dual purpose, providing primary support for the joist ends as well as capping the joists. Double any header over 4′ and any trimmer joists with a header attached within 3′ of its bearing. If the wall will have a doorway, place a double 2×6 header above the door’s rough opening. Over a long span room area not having anything to brace the roof off of a floating beam can be added above the ceiling joists to brace off of. For example, in the 50's and 60's many homes were built with 4x10 "joists" at 4' OC. 4) At multiple span joists or beams with unequal spans, the shorter span must be at least 75% of the longer span. According to the prescriptive chart your double 2x10 beam supported at 10'3" or less will handle joist spans of 8' so yes you can use a double 2x10 beam with 2x8 floor joists. The basement is not finished and I think that ill double up the floor joist and also block them. The span tables utilized in this document are limited to a snow load of 0 psf. They provide room for services like heating and cooling ducts as long as the services run parallel with the joists. The idea that heat rises has prevented many builders in the past from insulating floors, but adding insulation for floor joists can actually improve a home's energy efficiency as well as its insulating capabilities. These span tables are taken from the National Building Code of Canada, 1998 BC Edition (current edition) and are for reference only. Therefore, the span is 12'. The OP called it a mobile home. 1 subfloor or floor sheathing-see section r503 ∎ header-double if more than 4 ft. 3Joist Span: The length of the Joist from 6’one side, to the side that connects to the Beam. • 2 - 9’ x 7’ 6” insulated garage doors with jacks and 2x10 headers. ) which has a joist locator “bit” along with YouTube video. Timber I-joists - PDF4PRO PDF - The use of timber engineered structural Timber floor joist products are under span (m) cost (£/m2) beam and block sawn sw C16. Floor will be beefed up under the lathe. The narrow double lines show the floor joist themselves. I-Joists can span up to a whopping 32' without support, giving custom home builders the ability to create open floor plans that customers demand-LVL Flange. The rim joists were intended to be 2x10, but a single rim joist was installed that was a 2x8. The National Building Code references the Span Book as follows: “Tables A-1 to A-16 cover only the most com-mon. per square foot dead load. Do I need to add in the starting joist (the one attached to the wall) too? making 13 joists? I'm thinking that I do. Spacing is measured from the center of one joist to the center of the next. 16’ Span Joists 16” o. Spans in this table were derived from the IRC Table R502. NuBIM Vulcraft Plug-In For Tekla Structures; NuBIM Vulcraft Add-In For Revit Software; BIM Execution Plan; BIM Glossary ; Special Products. Types: Parallel Chord, Single Pitch, Double Pitch; Under slung or Bottom Chord Bearing. The widest span in the floor joist span table in Part 2 of this tutorial module showed that floor joists can span 17'2" if they are 2 X 12s spaced 12" o. Then using the lumber size of joists and the joist spacing, determine if you are within the maximum allowable joist span. MIU - I-Joist Hangers. Use the Simple-Span Floor Joists table where the floor joists frame into the side of or end on top of the header. for Roof Sheathing - 2x10 Headers Over Garage Doors. Depends entirely on how far apart the supports are, the joist spacing, the type of wood the joists are made from, the load requirements and accepted level of deflection. Wall Sheathing - Clear span wood I joists for upstairs floor system and 5/8" o. The double floor joist is located a distance of at least 2 times the cantilever length inward from the outer edge of the supporting wall below. When installing a plywood subfloor on top of the slab at grade, the. According to the prescriptive chart your double 2x10 beam supported at 10'3" or less will handle joist spans of 8' so yes you can use a double 2x10 beam with 2x8 floor joists. When joist hangers are used and the top flange is not lateral supported, the joist can rotate and will require web stiffeners. The joists should be sized using either the TRADA span tables or BS EN 1995. double joists under bearing partitions. Find: a) What is the actual live load deflection of the member and does it meet. 2 2x6 2x8. I'm guessing the joists are 2x8-2x10 dimensional lumber, and have a decent span. also available for the Android OS. So, with joists at 16" on center, they will support about 78 lbs. Joists - Live load deflection is limited to L/480, total deflection is limited to L/240, where L is the span length. You should put the beams at 7 and 14 feet out from the house, with the piers you should do 3 per beam with spacing of 1, 7, 13. By building a wall under joists, you divide the span. A 2x12 is nominally 11. maximum clear between posts is 7’-0”. This assumes that your roof load is being carried only by the posts/piers and not by the beam and joists. (This is based on a No. This is mandated by Read more Reinforcing Joists with Plywood. Maximum floor joist span for No. Processing. 2x6 11'-10" 2x8 15'-7" 2x10 19'-10" 2x12 24'-2" 2x6 10'-9" 2x8 14'-2" 2x10 18'-0" 2x12 21'-1" 2x6 9'-4" 2x8 12'-4" 2x10 14'-8" 2x12 17'-2" Maximum clear span for floor joist. How far can i span a 2x10 without support? Justanswer. These double 2x10's will only be taking the code required Live Load=30 psf and Dead Load=10 psf, correct? No roof loads will be carried by these floor joist, correct? JACUSTOMER-7u8tkca7- : No roof loads is correct. For a 20 lb live load, limited storage with SYP joists 16" OC is good to about 14. A 2x8 joist was not used for floor framing during my public experience as a builder, 2x10 was the minimum width for floor joist in house construction and the common length was 16ft per 24ft span. A double thickness board in the position of a rim joist is called a flush beam and serves a dual purpose, providing primary support for the joist ends as well as capping the joists. From a three-dimensional perspective, the floor joist framing would look like this: Keep in mind the span table above shows just the allowable spans for Douglas fir or larch, there are different tables for all the construction lumber species. for the floor. 50' lengths are not uncommon. use Douglas Fir 2x12's. For engineered rim joists, the manufacturer's recommendations govern. This is for "light" storage in the attic with a snow load for west TN figured in. I installed 3 rows of X bracing and it is much stiffer now. To size joists and rafters use the Maximum Span Tables for southern yellow pine. Using 4x wood doesn't get you much additional strength. span use hanger if header spans more than 6 ft. A severely arched, bulged, cracked, or sagging floor joist can only get worse over time, eventually deforming the floor above it. As an example, under certain circumstances a beam could be made out of one 2x10 or two 2x8s or three 2x6s -- they would all have the same strength. Using the beam span table, select your beam lumber size. the deck is typical construction. , and 24 in. Joists are usually identified as closely spaced supporting members, such as, Roof or Floor Joists. ENGINEERED WOOD PRODUCTS (EWP) LVL SPAN AND SIZE CHARTS. This is where I have my open span. All uniform loads on sub floor shall be transferred safely to joists. Where continuous joist members are used, the interior bearing supports shall be located within 2 feet (610 mm) of mid-span of the cold-formed steel joists, and the individual spans shall not exceed the. Not sure this is a modular or a mobile home. (on center). 4 -2X10 3 -2X12 4 -2X10 3 -2X12 4 - 2X12 4 - 2X12 4 - 2X12 4 -2X12 ENG. Traditional 2x10/12 floor system: This floor system uses solid 2x10/12’s in a horizontal orientation where the joist is connected on edge (1. Therefore, the span is 12'. Quoted Text Here A 20' wide building with a 2x6 supporting wall at each end would result in a 19'-1" free span. However, I have insisted that we use good insulation: R-24 (commercial size) stone wool batts by Roxul for. Stainless steel or hot-dip. Ledger shall be a minimum of 2x8 nominal. A wood or steel girder can be laid into the foundation across the long dimension, splitting the short dimension in half. bridging specified double rim joists parallel with ex terior/ interior load bearing walls 5/8" gypsum board ceilings finished 11 crawlspace floor 2" concrete skim coat on 6mil poly vb min 6" compacted granular fill 12 garage floor 4" concrete slab. Effective June 1, 2013. Maximum Floor Joist Span - No. -->>>times 4 = 12 joists in the 16 foot span. 3" minimum ceiling joist- lap @ bearing wallw/nails per rafter wall section: raised floor construction 2x blocking @ 8'-0" oc for joist spans over 8'-0" poured conc. TJI joists are lightweight and come in long lengths, which makes them faster and easier to install than traditional framing, and saves you both. Joist hangers shall be of proper size (i. We have a University research forest where WRC trees get rough sawn and sold at $1. The span is 15 feet. Wall Sheathing - Clear span wood I joists for upstairs floor system and 5/8" o. 2x10, 2x12, and so forth). Trus Joist® TJI® joists are a key part of making a high-performance floor. Both end nailing and joist retainers were used for those joists (six of them) not over the footings. Joist span table - Use these tables to determine floor joist spans based on grade of lumber, size of joist, floor joist spacing, and a live load of 30 lbs/ft 2 or 40 lbs/ft 2. Joists & Rafters Simplified maximum span tables for selected visual and mechanical grades of Southern Pine lumber in sizes 2×4 thru 2×12. A triple 2x6 beam over a span of 10’ feet should be more than sufficient for normal deck loads. At the house connection, joists bear on the attached ledger board. 60/bf in sizes below 2x10 and $1. the web, flanges, and lips of a stud or C-shape. 1 mm) nails at each end. A lot has to do with what your storing up there and the size of the ceiling joists we know they are 24 inches apart. This will be very sturdy. How far can i span a 2x10 without support? Justanswer. 2x10 joists, 1/2 osb should do it single layer for general storage, the joists carry the load I think a double layer is over kill. Pier and footing designed to support both floor sections. 2 inches may be reduced to 3/4 inch when the band joist is directly supported by a munsill, header, or by double top wall plates. lumber appears to be doug fir. • A continuous rim joist is connected to the end of each cantilevered joist. Joists are Initially placed leavinff their bearings unnailed, but successively Installing 2x10 full. Spans for Span Rated Decking Products (November 5, 2004). double 2x10 beam bolted to posts with min. subfloor - 36" Wide Stairs with Handrail - Trusses and rafters built for Northeast Snowload - 5/8" o. • 2 - 9’ x 7’ 6” insulated garage doors with jacks and 2x10 headers. dead load (weight of structure and fixed loads) 10 lbs/ft 2. Load will be of a typical wood working shop, heaviest items will be a lathe and table saw. 3" minimum ceiling joist- lap @ bearing wallw/nails per rafter wall section: raised floor construction 2x blocking @ 8'-0" oc for joist spans over 8'-0" poured conc. Size Select. NuBIM Vulcraft Plug-In For Tekla Structures; NuBIM Vulcraft Add-In For Revit Software; BIM Execution Plan; BIM Glossary ; Special Products. Replacing floor joists with either correctly sized joists for span and/or spacing will meet code requirements just as easily. Lumber Species Southern Pine Douglas Fir Douglas Fir-Larch Hemlock-Fir Spruce-Pine-Fir Redwood Western Cedar Ponderosa Pine Red Pine. Faulty Floor Joists. Depends entirely on how far apart the supports are, the joist spacing, the type of wood the joists are made from, the load requirements and accepted level of deflection. Maximum spans in feet-inches. The Uniform Design Live Load is 78 plf and the Uniform Design Dead Load is 30 plf. 2x8 for joists will be fine, with 16" OC. Jun 22, 2020 · Deck Beam Spans: Distance a joist spans between a beam and a ledger or between beams, using No. Where guards are required, outside joists and rim joists shall be a minimum length of 2x8 nominal. 625 ft x (left span + right span). 25 inches, and a 1x4 is 3/4-inch by 3. LH-Series Joist Deflection and Stress Analysis Calculator LH, Long span Steel Joists Designations: 18LH02 to 48LH17 Depths: 18 to 48 in. Wherever possible joists should span the shortest distance. The joists are currently span a distance of 16 feet, which I believe is too far to begin with. Beam and Joist Span Tables Built-Up Wood Floor Beams Supporting One Floor in a House Maximum Spans for Uniformly Distributed Loads Species and Grade Supported Built Up Beam Size Joist Length 3-2X8 4-2X8 3-2X10 4-2X10 3-2X12 4-2X12 8 9-8 11-2 11-10 13-8 13-8 15-10 10 8-8 10-0 10-7 12-2 12-3 14-2. That leaves several options: Assuming a 30 Live/10 Dead (sleeping areas/attics) 2x10 at 12" OC = 19'-10" span. May 18, 2003 · Clarification of Question by edrox-ga on 19 May 2003 22:29 PDT Maybe this will help. 00 “L” Shaped Stairs to 2nd Floor $600. 0 Other options avail. We've included 2x6, 2x8, 2x10 and 2x12 joist spans and more. Table of Contents Floor Section (Continued): F23 Beam Support. A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on. ( IRC R502. joists – double if header more than 4’ span Use hangers if header spans more than 6’ Lap joists 3” min Rim or band joist Tail joists must be supported by hangers at the header if the span exceeds 12’ TYPICAL FLOOR FRAMING Joists 16, 19. Double and triple joist hangers are wider to accommodate either a thicker piece of lumber or two or three joists placed side by side. Should use 2x10 for beams but 2x8 will be fine as well. Quoted Text Here A 20' wide building with a 2x6 supporting wall at each end would result in a 19'-1" free span. Span Calculator for Wood Joists and Rafters available for the iPhone. Before installing the intermediary joists, measure and mark the ledger for the location of each joist. By building a wall under joists, you divide the span. 2x10 Allowable Joist 2x10 2x12 Please include measurements in drawing: 1. That means these joists can span the 12-foot depth of the deck, and the beam can be located at the perimeter. LH-Series Joist Deflection and Stress Analysis Calculator LH, Long span Steel Joists Designations: 18LH02 to 48LH17 Depths: 18 to 48 in. Another option is to use double 4x6's stacked on edge to get additional support. Decking may be placed from an angle perpendicular to the joists to an angle of 45 degrees to the joists. The widest span in the floor joist span table in Part 2 of this tutorial module showed that floor joists can span 17'2" if they are 2 X 12s spaced 12" o. Joists are usually identified as closely spaced supporting members, such as, Roof or Floor Joists. 2x ceiling joists @ 16" oc 2x solid blocking 2x double top plate joist size spacing allowable span 2x6 2x8 2x10 2x12 allowable spans for df #2 floor joists (df-larch). 5 feet of span. Floor Assemblies-- floor joists and floor trusses 2x6 Joists 2x8 Joists 2x8 Joists 16" on center 1st fl 2x10 Joists 2x10 Joists 12" on center 1st fl 2x10 Joists 16" on center 1st fl 2x12 Joists 2x12 Joists 12" on center 1st fl 2x12 Joists 16" on center 1st fl Add for Metal Bridging Wood Truss 8 inch Wood Truss 12 inch. clearance see section r1001. • A continuous rim joist is connected to the end of each cantilevered joist. Place joists together and nail from each side with 2 rows of 10d common nails (16d common for BLI 80, BLI 90, and BLI 900) at 12" o. The O series bridging spans three joists in under/over installation and the center connection shall be made without nails. 2x10 15-4 13-3 10-10 18-0 16-1 13-5 15-5 13-9 11-3 Use the joist span table to find the acceptable joist sizes for a 12' span, 2x8s at 12" O. In the absence of any code documents of deck span tables in Canada, in 2008 I compiled my span tables from many sources for decks made with Canadian. 3 in x 16 in = 48 in giving --- 3 joists every 4 feet. They use an example of 2x10 floor joists with a span of 14feet on 16 inch centers and come up with 1,019 pd for each joist. The basement is not finished and I think that ill double up the floor joist and also block them. Ron, take the advice that Bill Lacey gave you and also go to your lumber yard and see what they can do for you. per square foot. 303 are total column loads for both sections. span use hanger if header spans more than 6 ft. 1 mm) nails at each end. That leaves several options: Assuming a 30 Live/10 Dead (sleeping areas/attics) 2x10 at 12" OC = 19'-10" span. So YES you should be fine with triple 2x6. The final authority in building codes, including rafter spans, lies with the building inspector in your local area. The span tables utilized in this document are limited to a snow load of 0 psf. Even a double 2x12 would have over 3" of deflection. If your design calls for double joists, do not disrupt the regular on-center spacing. So, with joists at 16" on center, they will support about 78 lbs. per pair 202. The joists are in blue, the area of bearing on one is in green. Size Select. Dense Structural Select Structural NonDense Select Structural No. Douglas fir works well with power tools. Ceiling joists, beams, and posts shall be built to withstand a minimum of 30 lbs. See Page 20 for more information. Note, the floor joists keep the span from buckling. Here’s my question. LedgerLOK is a code-compliant deck ledger board to rim joist structural wood screw that can be attached with no predrilling. One side of the header is supported by the basement foundation wall, the other by a metal support column. May 18, 2003 · Clarification of Question by edrox-ga on 19 May 2003 22:29 PDT Maybe this will help. The thickness of plywood panels in a subfloor is regulated by the spacing of the joists. Stainless steel or hot-dip. A TJI 16″ deep and spaced 16″ o. The reason to use I-Joists is that they can span longer distances and 15 ft is not a span long enough to require using them. , and 24 in. I installed 3 rows of X bracing and it is much stiffer now. When choosing 2x6 joists, the corresponding ledger board must be a 2x8 minimum. Double SYP #2 2x10's on a 17ft span are listed at 74 lb/ft. or #2 Fb 3,100 E 2. I just dont want to have to use 2x12's because the roof lines will not line up then with the additional 2". When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. 2×6 boards across the joists. double 2x10 beam bolted to posts with min. Unlike engineered wood beams, flitch plate beams can be flush framed with dimension lumber joists without causing shrinkage re-lated distortions to the structure. Processing. Floor Joist Spans 10 psf Dead Load and 50 psf Live Load 46 Floor Joist Spans 15 psf Dead Load and 125 psf Live Load. Wherever possible joists should span the shortest distance. (Maximum span for a support beam shall be 96 inches) 7. Ron, take the advice that Bill Lacey gave you and also go to your lumber yard and see what they can do for you. Glulam Beams Roof Trusses. In typical deck construction, with a ledger on one side of the joist and beam on the other, the size of the joists is driven by the size of the deck and based on the general maximum spans mentioned above. 11 wood structural girder-see tables r502. I want to put a BBQ that unfortunately will run parallel with the joists, so the last two joists will support the full weight of the BBQ distributed across 10'? The span of the joists are 13' 6" between the header and supporting beam. I-Joists can span up to a whopping 32' without support, giving custom home builders the ability to create open floor plans that customers demand-LVL Flange. The illustrations (one for cantilever joists and one for flush rim-beam hung joists) point out where joist span measurements are taken from — the saddle of the ledger mounted joist hanger to the center of a dropped beam or saddle of the. Install backer tight to top flange. Laminated Veneer Lumber. So YES you should be fine with triple 2x6. When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. If the situation allows, a 2x6 bearing wall (running under the sistered joist and a couple others) would be optimal and cost effective, spreading the load across the slab MUCH better than a point load distributed over 16 sq. Single span decks are framed with joists that have one span between supports (not including overhang) as shown in FIGURES 5 and 6. Hardwood Regardless if you are working with a floating hardwood floor or one that is nailed down and glued to the subfloor, the joists need to be covered with at least one sheet of 3/4-inch material. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. My helper drilled a 7/8 and a 21/2 inch hole in a 2x10 floor joist in a basement 55 inches from a. , and 24 in. 5(1) and R502. But, if the floor joists are 12"o/c- then 14' spans are acceptable for #2 or better material. LedgerLOK replaces lag screws and through-bolts and the …. When joist hangers are used and the top flange is not lateral supported, the joist can rotate and will require web stiffeners. While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the West Coast Lumber Inspection Bureau, the American Wood Council nor its members assume any responsibility for any particular design prepared from this Online Span Calculator. Spans in this table were derived from the IRC Table R502. For example, in the 50's and 60's many homes were built with 4x10 "joists" at 4' OC. (E) LVL joists with plywood sheathing (E) LVL floor joist (E) concrete slab (E) rim joist (E) mudsill (E) footing New "L90" per Plan & Plan Notes--install with long leg against rim joist (E) wall 12 Install nails to equal nail spacing indicated on Plans 5[ODQN 2NCP 0QVGU Install "MSTI36" strap and (2) 2x10 per detail at every. What is the max span allowable for a 2x10 set @ 16" o. Douglas fir works well with power tools. My father built one to these approx dimensions 20+ years ago using pressure treated lumber and it still looks great with no sag at all. If your project is located in a snow loading zone, see handout B-20 for loading based on elevation. • Joists must be 2x10 nominal or larger at 16-inch maximum spacing. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on-center (o. For example: a floor joist appropriately selected to span 10 feet with an L/360 limit will deflect no more than 120″/360 = 1/3 inches under maximum design loads. All uniform loads on sub floor shall be transferred safely to joists. Header span > 4' Header span > 6' Tail joist > 12 Ridge board or gusset Continuous wall tie Min 1 ½" on wood 3" on conc/masonry >2x10 Block at bearing >2x12 Bridging @ 8' Double header & trimmer Hangers for header Framing anchor or ledger   Allowable Ceiling Spans Without storage With limited storage With fixed stair R802. Lumber Species Southern Pine Douglas Fir Douglas Fir-Larch Hemlock-Fir Spruce-Pine-Fir Redwood Western Cedar Ponderosa Pine Red Pine. • 16” on center or engineered, residential grade truss joist I-beams for clear span floor plans. Hi, I will a 2X10 pressure treated floor joist span 16 foot at 16" OC? Also if I double up up 2X8's for the beams, how many piers will I need for 20. i dont want any beam sag AndrewNJ 09:27AM | 06/26/20. Engineered Wood Products –I-Joists, Glulam, and LVL (laminated veneer lumber) wood products. Joist hangers shall be of proper size (i. ia n l figure r502. 2x10's would meet code and 2x12's would be stiffer and less bouncy. If they are bedrooms ONLY you can use 30# live load. This is for "light" storage in the attic with a snow load for west TN figured in. Run them the 8 ft length. The header is made up of three 2x10's about 8' long. This number is known as a span rating. Beams shall be double members of joist size or other single member types engineered for. While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the West Coast Lumber Inspection Bureau, the American Wood Council nor its members assume any responsibility for any particular design prepared from this Online Span Calculator. This explains 5 different answers, your going to have to be more specific. These tables can also be used to determine deck joist span. 0 Other options avail. Spans for Span Rated Decking Products (November 5, 2004). The maximum span distance for 12-inch spacing is greater by as much as 30 percent compared to 24-inch spacing. Maximum Floor Joist Span - No. A minimum design live load of _____ shall be used for the determination of the maximum allowable floor joist spans in attics that are accessed by a fixed stairway. • 16” on center or engineered, residential grade truss joist I-beams for clear span floor plans. So instead of having a post run all the way from the roof to the ground, it can stop at the double floor joist. • Joists must be doubled at the ends of the braced wall panel above. His sag issues are showing that to be. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. 2 2412 91⁄ 29 178-019 158-079 148-099 138-109 188-079 178-009 158-079 138-119 7GPI 20 11 ⁄. , you have done the hardest part of the calculations by providing the load applied to the beam. These joist spans tables don't take into account the wet conditions. For cantilevers greater than the depth of the joist material (9 1/4 inches for a 2x10), you must use the span criteria for "joists with cantilevers. Chapter 5 - Design of Light-Wood Framing inches by 9. See diagram. Correcting a problem joist is an easy repair and makes a big difference in your finished floor. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on-center (o. Mark the Deck Joist Positions on the Ledger Board. When building a house or even a deck, it is important to confirm you have the correct joist sizes, spans and spacing before you get started. Ledger shall be a minimum of 2x8 nominal. Depending on deck size and joists span, you can either use 2x8 or 2x10 floor joists. Please login or register. x 9-1/2 in. I don't know if I have rebar run through the. Filler blocking 1⁄ 8" gap. For instance, joists that are placed 24 inches apart must be wider than joists placed 16 inches apart. Ron, take the advice that Bill Lacey gave you and also go to your lumber yard and see what they can do for you. This Rafter Span Calculator is species specific for Douglas Fir, hemlock, etc. 4X8: 8 feet. just dont put glue where you are going to drill hole or you will gum up your drill bit with glue. Live load is weight of furniture, wind, snow and more. The basement is not finished and I think that ill double up the floor joist and also block them. How about a new video on finding joists in the second story floor, under carpet, to fix floor squeaks? AND, if possible, how to further fix those annoying squeaks. D-fir, hem-fir, SYP, and SPF are all grouped together in the header table. When installing a plywood subfloor on top of the slab at grade, the. 2 grade Douglas Fir-Larch wood joist. (4) Add a single 2x10 header between the doubled joists to carry the 1' stub joists from the beam. 1(2) Design Criteria: Hem–Fir # 2 joists with a live/dead load of 40/10 psf. Chapter 5 - Design of Light-Wood Framing inches by 9. You might need to double up every other joist. They don’t provide fine-tuned results. If I double the beam the rim joists only would be resting on the beam and none of the joist. 3 2x10 Beam Span April 12, 2018 - by Arfan - Leave a Comment Residential wood deck construction always staple this sheet to the top of your cal chegg microllam lvl beams weyerhaeuser floor beam span tables calculator floor joist span tables calculator. 2 Grade of Douglas fir and maximum span floor joists - imperial units Nails and Spikes - Withdrawal Force - Allowable withdrawal load for nail and spikes Softwood and Hardwood - Structural Strength Classes - Strength classes, bending stress and mean density of hardwood and softwood. You can get away with only post for 4 corners, for more support you can add a post at 6 ft on 12 ft side which is a good idea as the actual floor joist will be attached to that frame. Mark the Deck Joist Positions on the Ledger Board. This is mandated by Read more Reinforcing Joists with Plywood. Dwellings, Tenements and Grammar School Rooms With Fixed Desks. While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the West Coast Lumber Inspection Bureau, the American Wood Council nor its members assume any responsibility for any particular design prepared from this Online Span Calculator. 0 Other options avail. You need 100 pounds per square foot live loading. Dimensional Lumber Deck Beam Span Chart. 2 x 12 is overkill for a 14' span 2 x 8 will suffice. For example: A No2 grade southern pine (most common) 2x8, 16"OC, 40psf live and 10psf dead with a 360/ deflection (suitable for tile) can span a maximum of 12' 10". Timber I-joists - PDF4PRO PDF - The use of timber engineered structural Timber floor joist products are under span (m) cost (£/m2) beam and block sawn sw C16. See the deck joist calculations below and study your local code. Instead, treat the center of the gap between the double joists as a single joist center. walkereng : You can use double 2"x10'" members (Douglas Fir #1 grade) spaced at 16" o. For sistering, cut ¾-inch plywood into long strips the same width as the joist's web. A much shorter span rating, and you have to use thicker plywood to span the 24" joist spacing. Floor joists will be single or double, using 2x6 or 2x8 or 2x10 or 2x12. MIU - I-Joist Hangers. While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, neither the West Coast Lumber Inspection Bureau, the American Wood Council nor its members assume any responsibility for any particular design prepared from this Online Span Calculator. Joists are Initially placed leavinff their bearings unnailed, but successively Installing 2x10 full. ? I need to add a room upstairs and the joists will be 16'. I am thinking 5/8 or 3/4 marine plywood underlayment, 1/2" or so Hardie board, screwed into the plywood, then thinset, dry and thinset and tile. Place joists together and nail from each side with 2 rows of 10d common nails (16d common for BLI 80, BLI 90, and BLI 900) at 12" o. Just over engineer. How far can i span a 2x10 without support? Justanswer.
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