Featuring Selection and Installation Information for Lateral Wind Loads

Transcription

1 #TJ-8000 SPECIFIER S GUIDE 1¼" TIMBERSTRAND LSL RIM BOARD AND 1 1 8" TJ RIM BOARD Featuring Selection and Installation Information for Lateral Wind Loads For Use in ASCE/SEI 7-05 Basic Wind Speed Regions of 90 and 120 mph 1 1 4" Thickness Matches Lateral Load Capacity of 2x Nominal Sawn Lumber in Unblocked Diaphragms easy-to-use Selection Tables Consider the Home s Size, Shape, and Roof Design limited Product Warranty woodbywy.com

2 T J T 5 5 Quality Rim Board from Weyerhaeuser Longer lengths mean faster installation and fewer joints for better insulating values Depths are sized to match TJI joists for less cutting and material waste High vertical load transfer capacity Recognized and accepted by major building codes For years, little attention was paid to the importance of lateral forces. However, recent earthquake and hurricane disasters have demonstrated the importance of proper lateral load transfer. Engineering analysis and practical experience confirm that rim board is often an essential structural link in a home s ability to resist the lateral loads generated by high winds. The products in this guide are readily available through our nationwide network of distributors and dealers. For more information on other applications or other Trus Joist products, contact your Weyerhaeuser representative. Code Evaluations: ICC ES ESR-1387 TABLE OF CONTENTS Lateral Load Capacity 3 Design Properties 4 Material Weights 4 Nailing Recommendations 4 Lateral Details and Specifications 5 Lateral Detail Selection Tables 6 7 Trus Joist 1¼" TimberStrand laminated strand lumber (LSL) rim board supports vertical loads and provides the nailing surface necessary to adequately transfer wind and seismic loads. 1¼" TimberStrand LSL rim board is manufactured by Weyerhaeuser under quality assurance requirements for strength, stiffness, and durability. We re so confident about its performance that we include it in our limited product warranty and recommend it for use with the Trus Joist TJI Floor System. For applications that don t require the superior performance of 1¼" rim material, we offer 1 1 8" TJ Rim Board. Also manufactured under our quality assurance program, 1 1 8" TJ Rim Board has properties that comply with conventional construction framing practices and is also covered by our limited product warranty. Available Sizes: 1¼" TimberStrand LSL rim board is available in the following sizes: Depths: 9½", ", 14", 16", 18", and 20" Lengths: 16', 20', 24', 32', and 48' 1 1 8" TJ Rim Board is available in the following sizes: Depths: 9½", ", 14", and 16" Lengths: 12' and 16' ABOUT THIS GUIDE This guide for lateral wind loads is an easy-to-use design tool to help specifiers and builders select a rim board product. It provides selection information sufficient to build a home that can withstand lateral forces generated by design wind speeds of up to 120 mph. Protect product from sun and water Product Storage u om CAUTION: Wrap is slippery when wet or icy Align stickers directly over support blocks u o c m Use support blocks at 10' on-center to keep bundles out of mud and water 2

3 1¼" TIMBERSTRAND LSL RIM BOARD AND LATERAL Load CapaCITY Why is lateral load capacity of rim boards important? Lateral loading on structures is typically from wind or seismic forces, and rim board is an important structural link in resisting those lateral loads. To further explain lateral loads, let s look at a typical home and how the wind loads travel through the building: Roof Roof Roof Shear walls Wind force Floor Floor Floor Wind force on a wall is resisted by wall sheathing and framing. Wall is supported at top by roof and at bottom by floor. Load in roof and floor s is transferred to side walls (or shear walls) by rim board, rim joist, or blocking. Connections are essential to transfer load. Side walls act as shear force collectors. Loads may accumulate from top of house to bottom. Why is TimberStrand LSL rim board 1 1 4" thick? Through field experience and testing, Weyerhaeuser found that 11 4"-thick rim board provides an adequate nailing surface and maximizes lateral load transfer. Consideration was given to: Panel edge distance Section of the IBC states that nails shall be placed not less than 3 8" from the panel edge for lateral-force-resisting systems. Nail edge distance To avoid splitting, an edge distance of 2.5 x the nail diameter is recommended. This applies to the sheathing nails or fasteners and to the larger-diameter nails that transfer wall loads: 8d (0.131" x 21 2") nail, 2.5 x 0.131" dia. = 0.33" 3 8" minimum edge distance 16d (0.162" x 31 2") nail, 2.5 x 0.162" dia. = 0.41" 7 16" minimum edge distance The 11 4" thickness is required to provide the necessary edge distance for wall nails and provides some margin for error in the placement of the sheathing nails or fasteners. How do the lateral capacities of 11 4" TimberStrand LSL rim board compare to sawn lumber framing? In unblocked floor or roof s, 11/4" TimberStrand LSL rim board is capable of transferring the same lateral loads allowed by code for 2" nominal framing members. This equivalency was verified by testing: International Building Code, Case 1, unblocked at 240 plf with 23 32" sheathing and 8d (0.131" x 21 2") nails at 6" on-center. For more information about the lateral load capacity of rim board in wind-controlled regions, see pages 6 7. Are all 11/4" rim boards equal? No. Not every rim board material meets Weyerhaeuser s tight manufacturing specifications for strength, dimensional stability, and durability. Weyerhaeuser offers 11 4" TimberStrand LSL rim board as our premium rim board product and recommends it for use with our TJI joist floor system. Wall nail, typically 16d (0.135" x 31 2") at 12" on-center Floor panel nail, typically 8d (0.131" x 21 2") at 6" on-center 1 1 4" TimberStrand LSL rim board 2x4 or 2x6 stud wall When sheathing thickness exceeds 7 8", trim sheathing tongue at rim board 11 4" Toe nail, 10d (0.131" x 3") at 6" on-center Wall sheathing See page 5 for more detail options TJI joist spanning in either direction 91 2" " 14" 16" 18" 20" 1¼" TimberStrand LSL rim board is manufactured to a consistent moisture content and uniform dimensions, with depths that match other TJI joist floor system components 3

4 Design Properties and material Weights Allowable Design Stresses (1) (100% Load Duration) 1 4" TimberStrand LSL 1 8" Rim Board (2) TJ Rim Board (3) Modulus of elasticity E = 1.3 x 10 6 psi Adjusted modulus of elasticity E min = 660,750 (4) Shear modulus of elasticity G = 81,250 psi Flexural stress F b = 1,700 psi (5) Compression perpendicular to grain F c = 710 psi (6) Compression parallel to grain F cll = 1,835 psi Horizontal shear parallel to grain F v = 425 psi Vertical load capacity = 4,250 plf (7) 4,000 plf (7) (1) Unless otherwise noted, adjustment to the design stresses for duration of load are permitted in accordance with the applicable code. (2) 11 4" TimberStrand LSL rim board is recognized by code as providing the lateral transfer capacity equivalent to 2" nominal Douglas fir-larch or southern pine in unblocked horizontal s. (3) 1 1 8" TJ Rim Board is recognized as an acceptable rim board material for use in conventional construction; it has a maximum lateral transfer capacity of 180 plf. (4) Reference modulus of elasticity for beam stability calculations, per NDS (5) For 12" depth. For other depths, multiply by [ _ 12 d _ ] (6) F c must not be increased for duration of load. (7) For depths up to 16". For 18" and 20" depths, capacity is 3,450 plf. Approximate Weights of Rim Board Depth Weights (plf) 1¼" TimberStrand LSL Rim Board 1 1 8" TJ Rim Board 9 1 2" " " " " " 7.3 TimberStrand LSL and TJ Rim Board are intended for dry-use applications Nailing Recommendations Encloses cantilevered TJI joists Attach to each joist with two 10d (0.131" x 3") nails, one each at top and bottom flange. Offers high vertical load transfer capacity. Replaces TJI rim joists and blocking panels. Vertical load transfer at bearing 1¼" 1 1 8" Rim Board Rim Board 4,250 plf 4,000 plf Provides a solid surface for attachment of sheathing, siding, and deck ledgers When attaching deck ledgers, locate bolts 2" minimum from top and bottom edges of rim board and deck ledger. Required bolt frequency varies by application and is dictated by specific deck geometry/loading. Bolt spacing limits match NDS minimum recommendations. Lag Screw Capacities Allowable Load (1) (lbs) Fastener Size 1¼" Rim Board 1 1 8" Rim Board 3 8" lag bolt 400 N.A. 1 2" lag bolt (1) Allowable load determined in accordance with AC 124. Corrosion-resistant fasteners required for wet-service applications " nailing surface increases load capacity, reduces splits, and makes subflooring easier to fasten Nail Size On-Center Nail Spacing 1¼" Rim Board 1 1 8" Rim Board 8d (0.113" x 2 1 2") 4" 6" 8d (0.131" x 2 1 2") 4" 6" 10d (0.128" x 3"), 12d (0.128" x 3 1 4") 4" 6" 10d (0.148" x 3"), 12d (0.148" x 3 1 4") 4" 6" 16d (0.135" x 3 1 2") 4" 16" (1) 16d (0.148" x 3 1 4") sinker 4" 16" (1) 16d (0.162" x 3 1 2") 6" (2) 16" (1) (1) Can be reduced to 5" on-center with maximum nail penetration of 1 3 8" into the narrow edge (for example, nails that connect the sole plate above to the block or rim). (2) Can be reduced to 4" on-center with maximum nail penetration of 1 3 8" into the narrow edge (for example, nails that connect the sole plate above to the block or rim). 4

5 rim board Details and installation Rim Board Installation Wall Framing Specifications Rim Board Installation Detail A3.1 (1)(2) A3.2 (1)(2) A3.3 (1) A3.4 (1) Rim Board Thickness 1 1 8" 11 4" 11 4" 11 4" Plate Nail 16d (0.135" x 3 1 2") 16" o.c. 12" o.c. 8" o.c. 12" o.c. Floor Panel Nail 8d (0.131" x 2 1 2") 6" o.c. Rim Board to TJI Joist 10d (0.131" x 3") One into each flange Toe Nail 10d (0.131" x 3") 6" o.c. 6" o.c. 4" o.c. 6" o.c. TJI Joist to Plate 8d (0.113" x 2 1 2") Two nails driven at an angle into bottom flange, one each side of web at least 11/2" from end Sheathing 7 16" structural 1 sheathing (3) 3 8" structural 1 sheathing in all areas (4) Boundary Nailing 8d (0.131" x 21/2") at 6" o.c. 8d (0.131" x 21/2") at 4" o.c. Per code Per code Intermediate Nailing 8d (0.131" x 21/2") at 12" o.c. Max. Window Opening Height 5'-4" (5) % of Wall with Full Height Sheathing 70% Exterior Face Interior Face Holdowns Sheathing 1 2" gypsum Boundary Nailing Per code Per code 5d (0.086" x 1 5 8") at 7" o.c. Intermediate Nailing 5d (0.086" x 1 5 8") at 10" o.c. 90 mph Wind Zone None 120 mph Wind Zone 16" o.c. within 10' of corners (6) 16" o.c. within 6' of corners (6) 16" o.c. within 4' of corners (6) None (1) All sheathing shall be properly blocked and nailed. (2) Verify the lateral capacity of the wall. Not all types of code-allowed wall construction provide the same lateral resistance. Check with your local building officials or the design professional of record. (3) Detail A3.3 shall be a segmented wall, location of full-height structural sheathing per code. (4) Sheathing shall be continuous over all plate-to-plate and plate-to-rim board interfaces and may butt together at mid-depth of rim board as shown in A3.4. At foundation, fasten the bottom edge of the sheathing to the sill plate. (5) In addition, one 6'-8" standard door opening is allowed. (6) If required, holdowns shall be Simpson Strong-Tie CS20 (or equivalent) straps attached with four 8d (0.131" x 21 2") nails at each end. As an alternative to holdown straps, wall sheathing may be attached as shown in A3.4. See footnote 4. 2x4 or 2x6 stud wall at 16" on-center maximum Web stiffener required on both sides at A3._W ONLY Plate nail Floor panel nail Rim board to TJI joist 1 1 8" TJ Rim Board or 1 1 4" TimberStrand LSL (see nailing schedule above) Toe nail Rim board to TJI joist Sheathing may be attached as shown in A3.4 A3.1 A3.2 A3.3 A3.1 W A3.2 W A3.3 W TJI joist to plate When panel thickness exceeds 7 8", trim sheathing tongue at rim board TJI joist spanning in either direction 2x4 or 2x6 stud wall at 16" on-center maximum Web stiffener required on both sides at A3.4W ONLY A3.4 A3.4 W Plate nail Floor panel nail Rim board to TJI joist 11/4" TimberStrand LSL rim board Attach sheathing per nailing schedule (above) Toe nail Rim board to TJI joist 12" minimum Install proper blocking to support all panel edges TJI joist to plate When sheathing thickness exceeds 7 8", trim sheathing tongue at rim board TJI joist spanning in either direction Exterior Deck Attachment Structural exterior sheathing Flashing 1 1 8" TJ Rim Board or 1 1 4" TimberStrand LSL Treated 2x_ ledger Maintain 2" distance (minimum) from edge of ledger to fastener. See fastener table on page 4. LA Allowable load per Lag Screw Capacities table on page 4 5

6 Lateral Detail Selection Tables 90 mph or less One Story Two Story Roof Pitch Ridge Aspect Ratio (L1/L2) Height (ft) : : : : to : : : : :12 to 12: Legend 1 = Detail A3.1 2 = Detail A3.2 3 = Detail A3.3 4 = Detail A3.4 See page 5 for details. How to Use These Tables Step 1. Check the General Assumptions and Limitations to ensure applicability of these tables. Step 2. Draw a box around the foundation of the structure as shown on page 7. Carports, single story slab-on-grade garages, porches, decks, overhangs, or other such elements shall be excluded from the main structure. Step 3. Calculate the Aspect Ratio = L 1 /L 2 Step 4. Determine the Roof Pitch and Ridge Height. Step 5. Using the appropriate wind speed table, find the section corresponding to your rim board application. Find the row where the Roof Pitch and Ridge Height meet or exceed those of the structure. Step 6. To choose an appropriate detail, follow the row to the right until it intersects with an Aspect Ratio that meets or exceeds the ratio calculated in step 3. Step 7. See page 5 for details and specifications. General Assumptions and Limitations Maximum building dimensions (L1 is the longest side and L2 is the shortest side): L 1 = 80', L 2 = 60'. See Example on page 7. Structures are regular-shaped with continuous load paths to the foundation, as defined in ASCE/SEI Tables are applicable for one- and two-story residential structures with bottom-level wall heights of 9' or less and second-level wall heights of 8' or less. Wind pressures are based on: ASCE/SEI and 120 mph winds (3-second gust) Exposure category A or B No special wind regions or topographical effects have been considered. User should verify that vertical load capacity of rim board is not exceeded. See page 4. Tables assume wall construction per the details and specifications on page 5. Wall framing assumes a stud spacing of 16" on-center and a specific gravity of A higher-numbered detail may be used in place of the detail number shown. For other application conditions, contact your Weyerhaeuser representative. Shaded cells indicate that conventional construction using 11 8" TJ Rim Board is acceptable. 6

7 Lateral Detail Selection Tables 120 mph or less One Story Two Story Roof Pitch Ridge Aspect Ratio (L1/L2) Height (ft) : : : : to : : : : :12 to 12: See How to Use These Tables and General Assumptions and Limitations on page 6. Legend 1 = Detail A3.1 2 = Detail A3.2 3 = Detail A3.3 4 = Detail A3.4 See page 5 for details. Example Step 1. Assume the house below is two stories with a Roof Pitch of 8:12 and a Ridge Height of 30'. Step 2. Draw a box around the structure. Step 3. L 1 /L 2 = 48'/40' = 1.2 Step 4. Roof Pitch = 8:12 Ridge Height = 30' Step mph wind zone: lateral detail = A mph wind zone: lateral detail = A Ridge Height = 30' 48' 40' L2 L1 7

8 We Can Help You Build Smarter You want to build solid and durable structures we want to help. Weyerhaeuser provides high-quality building products and unparalleled technical and field assistance to support you and your project from start to finish. Floors and Roofs: Start with the best framing components in the industry: our Trus Joist TJI joists; TimberStrand LSL rim board; and TimberStrand LSL, Microllam LVL, and Parallam PSL headers and beams. Pull them all together with our self-gapping and self-draining Weyerhaeuser Edge Gold TM floor panels and durable Weyerhaeuser roof sheathing. Walls: Get the best value out of your framing package use TimberStrand LSL studs for tall walls, kitchens, and bathrooms, and our traditional, solid-sawn lumber everywhere else. Cut down installation time by using TimberStrand LSL headers for doors and windows, and Weyerhaeuser wall sheathing with its handy two-way nail lines. Use our TJ Shear Brace for extra support in walls with large openings or in high wind or seismic areas. Software Solutions: Whether you are a design professional or lumber dealer, Weyerhaeuser offers an array of software packages to help you specify individual framing members, create cut lists, manage inventories even help you design a complete structural frame. Contact your Weyerhaeuser representative to find out how to get the software you need. Technical Support: Need technical help? Weyerhaeuser has one of the largest networks of engineers and sales representatives in the business. Call us for help, and a skilled member from our team of experts will answer your questions and work with you to develop solutions that meet all your structural framing needs. CONTACT US woodbywy.com/contact Contact your local representative or dealer at: Visit woodbywy.com/warranty for copies of this and other Trus Joist Engineered Wood Product warranties. February 2013 Reorder TJ-8000 This document supersedes all previous versions. If this is more than one year old, contact your dealer or Weyerhaeuser rep., Weyerhaeuser, Microllam, Parallam, TimberStrand, TJ, TJI, and Trus Joist are registered trademarks and Edge Gold is a trademark of Weyerhaeuser NR Weyerhaeuser NR Company. All rights reserved. Printed in the USA.