*Revised November 2003

Transcription

1 LEGACY REPORT * Reissued April 1, 2002 ICC Evaluation Service, Inc. Business/Regional Office # 5360 Workman Mill Road, Whittier, California # (562) Regional Office # 900 Montclair Road, Suite A, Birmingham, Alabama # (205) Regional Office # 4051 West Flossmoor Road, Country Club Hills, Illinois # (708) Legacy report on the 1997 Uniform Building Code, the 2000 International Building Code, the 2000 International Residential Code, the BOCA National Building Code/1999 and the 1999 Standard Building Code DIVISION: 06 WOOD AND PLASTICS Section: Prefabricated Structural Wood STRUCTURAL COMPOSITE LUMBER [TIMBERSTRAND LAMINATED STRAND LUMBER (LSL), PARALLAM PARALLEL STRAND LUMBER (PSL), AND MICROLLAM LAMINATED VENEER LUMBER (LVL)]; MICROLLAM LVL RIM BOARD; TJ-STRAND RIM BOARD; e-rim BOARD; AND SPACEMAKER TRUSSES TRUS JOIST, A WEYERHAEUSER BUSINESS 200 EAST MALLARD DRIVE BOISE, IDAHO SUBJECT Structural Composite Lumber [TimberStrand Laminated Strand Lumber (LSL), Parallam Parallel Strand Lumber (PSL), and Microllam Laminated Veneer Lumber (LVL)]; Microllam LVL Rim Board; TJ-Strand Rim Board; e-rim Board; and SpaceMaker Trusses. 2.0 DESCRIPTION 2.1 General: The structural composite lumber (SCL) described in this report is an alternative material to that described in Chapter 23 of the 1997 Uniform Building Code (UBC) and Chapter 23 of the 1999 Standard Building Code (SBC), and complies with the requirements noted in Section of the 2000 International Building Code (IBC) for allowable stress design (Section ), and Section of the BOCA National Building Code/1999 (NBC). The Microllam LVL Rim Board, TJ-Strand Rim Board, e-rim Board and SpaceMaker trusses comply with the UBC, NBC and SBC as alternative materials and methods of construction. Chapters 5, 6 and 8 of the 2000 International Residential Code (IRC) are applicable to the SCL, Microllam LVL Rim Board, TJ-Strand Rim Board, e-rim Board and SpaceMaker trusses described in this report. 2.2 TimberStrand LSL: General: TimberStrand LSL is manufactured from strands of a single wood species or a combination of wood species blended with an isocyanate-based adhesive. The wood species, species combinations and adhesive used to manufacture TimberStrand LSL are specified in the approved TimberStrand LSL quality control manual and manufacturing standard prepared by Trus Joist. TimberStrand LSL is produced with the wood strands oriented in a parallel direction and has finished lengths up to 64 feet ( mm), thicknesses up to 5 1 / 2 inches (140 mm), and depths up to 48 inches (1219 mm). TimberStrand LSL treated with zinc borate (ZB) in accordance with the TimberStrand LSL quality control manual and manufacturing standard prepared by Trus Joist may be used within the building envelope, not in ground contact, such as sill plates supported by masonry or concrete foundations, footings or slabs (AWPA use category UC2) Design and Allowable Stresses: The design provisions for wood construction noted in the applicable code, Chapter 23 of the UBC, Section of the IBC (for allowable stress design) and Section R301 of the IRC, are applicable to TimberStrand LSL unless otherwise noted in this report. Allowable unit stresses for dry conditions of use, and details of edge loading (joist/beam) and face loading (plank) are noted in Table 1. Unless otherwise noted, adjustment to the design stresses for duration of load is permitted in accordance with the applicable code. Allowable lateral loads for nails installed perpendicular or parallel to the wide face of strand of TimberStrand LSL are the same as those provided in the applicable code for sawn lumber having a minimum specific gravity of 0.50, such as for Douglas fir-larch, as noted in Table 2 of this report. Allowable withdrawal loads for nails installed perpendicular or parallel to the wide face of strand of the TimberStrand LSL shall be as noted in Table 2 of this report. Nail spacing for nails installed parallel to the wide face of strands (installed in the edge of the TimberStrand LSL product) is limited as noted in Table 2. Nail spacing for nails installed perpendicular to the wide face of strands (installed in the face of the TimberStrand LSL product) is the same as that permitted in the applicable code for sawn lumber. Other nail spacings for specific applications, such as prefabricated steel components or hangers, may be used as detailed for TimberStrand LSL in a current ICC-ES evaluation report or ICC-ES Legacy Report. Allowable lateral loads for machine bolts and lag bolts installed perpendicular to the wide face of TimberStrand LSL, with loads applied parallel or perpendicular to the grain of the wood strands, are the same as those provided in the *Revised November 2003 ICC-ES legacy reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, Inc., express or implied, as to any finding or other matter in this report, or as to any product covered by the report. Copyright 2003 Page 1 of 13

2 Page 2 of 13 applicable code for sawn lumber having a specific gravity specified in Table TimberStrand LSL Rim Board Applications: The 1.3E TimberStrand LSL product is permitted to be used in rim board applications. For the purpose of this evaluation report, rim boards are defined as continuously supported structural members, located at the joist elevation in an end bearing wall or located parallel to the joist framing, that are full depth of the joist space and that are used for any of the following purposes: 1. Transfer, from above to below, of all vertical loads at the rim board location. Allowable vertical loads are noted in Table Provide diaphragm attachment (sheathing to top edge of rim board). 3. Transferring in-plane lateral loads from the diaphragm to the wall plate below. 4. Provide lateral support to the joist or rafter (resistance against rotation) through attachment to the joist or rafter. 5. Provide closure for ends of joists or rafters. 6. Provide attachment base for siding or exterior deck ledger. Toenailed connections are not limited by the 150 plf lateral load capacity noted for seismic zones 3 and 4 in Section of the UBC, or seismic design categories D, E and F in Section of the IBC. The ability of TimberStrand LSL rim board to transfer shear is described in Footnote 1 to Table 3 of this report Fire Resistance: The fire resistance of TimberStrand LSL is equivalent to that of similar sizes of sawn lumber when used in fire-resistive assemblies as specified in Tables 7-B and 7-C of the UBC and Tables 719.1(2) and 719.1(3) of the IBC. TimberStrand LSL is permitted to be substituted for sawn lumber in code recognized fire-resistive floor-ceiling, roofceiling, and wall assemblies Fire Blocking: TimberStrand LSL is permitted to be used as fire blocking as noted in Section of the UBC, Section of the IBC and Section of the IRC. 2.3 Parallam PSL: General: Parallam PSL is manufactured from strands of a single wood species, or species combinations, that are oriented parallel to the length of the member and coated with a phenol-formaldehyde adhesive. The wood species or species combinations and adhesive used to manufacture Parallam PSL are specified in the approved quality control manual and manufacturing standard prepared by Trus Joist. Parallam PSL is available in rectangular cross sections having a maximum width of 11 inches (279 mm), a maximum depth of 19 inches (483 mm), and lengths up to 66 feet ( mm). Cross sections up to 7 inches by 54 inches (178 mm by 1372 mm) are available through secondary lamination Design and Allowable Stresses: Design provisions for wood construction noted in the applicable code, Chapter 23 of the UBC, Section of the IBC (for allowable stress design) and Section R301 of the IRC, are applicable to Parallam PSL unless otherwise noted in this report. Allowable unit stresses for dry conditions of use and details of edge loading (joist/beam) and face loading (plank), are noted in Table 4. Unless otherwise noted, adjustment to the design stresses for duration of load is permitted in accordance with the applicable code. Allowable withdrawal and lateral loads for nails installed perpendicular or parallel to the wide face of strands of the Parallam PSL product are the same as those provided in the applicable code for sawn lumber having a minimum specific gravity of 0.50, such as for Douglas fir-larch. Nails installed parallel to the wide face of strands (installed in the edge of the Parallam PSL product) must be spaced a minimum of 3 inches (76 mm) on center for 8d common nails, a minimum of 4 inches (102 mm) on center for 10d and 12d common nails, and a minimum of 6 inches (152 mm) on center for 16d common nails. Spacing of nails installed perpendicular to the wide face strands (installed in the face of the Parallam PSL product) is the same as that permitted in the applicable code for sawn lumber. Other nail spacings for specific applications, such as prefabricated steel components or hangers, may be used as detailed for Parallam PSL in a current ICC-ES evaluation report or ICC-ES Legacy Report. Allowable lateral loads for machine bolts installed perpendicular to the wide face of strands of the Parallam PSL product, with loads applied parallel or perpendicular to the grain of the wood strands, are the same as those provided in the applicable code for sawn lumber having a minimum specific gravity of 0.50, such as for Douglas fir-larch. For nail and bolt connections other than those described in this report, specific approval is required Fire Resistance: The fire resistance of Parallam PSL is equivalent to that of sawn lumber of equal depth and width when used in Type IV heavy-timber-construction. 2.4 Microllam LVL: General: Microllam LVL is manufactured from veneers of a single wood species, or species combinations and adhesives meeting the requirements specified in the approved quality control manual and manufacturing standard prepared by Trus Joist. During manufacture, the veneers are placed in a continuous-feed press, with all grain oriented parallel to the length of the member, and the veneers are bonded together with the approved adhesives, complying with the durability requirements of ASTM D Microllam LVL is available in thicknesses from 3 / 4 inch (19.1 mm) to 3 1 / 2 inches (89 mm), depths from 2 1 / 2 inches (63.5 mm) to 48 inches (1219 mm), and lengths up to 80 feet ( mm) Design and Allowable Stresses: The design provisions for wood construction noted in the applicable code, Chapter 23 of the UBC, Section of the IBC (for allowable stress design) and Section R301 of the IRC, are applicable to Microllam LVL, unless otherwise noted in this report. Allowable unit stresses, sizes and veneer species for Microllam LVL for dry conditions of use are specified in Table 5 of this report. Unless otherwise noted, adjustment of the design stresses noted in Table 5 for duration of load is permitted in accordance with the applicable code. Allowable withdrawal and lateral loads for nails installed perpendicular or parallel to the wide face of Microllam LVL are the same as those provided in the applicable code for sawn lumber having a minimum specific gravity of 0.50, such as for Douglas fir-larch. Spacings of nails installed perpendicular to the glue lines on the wide face of the Microllam LVL products are the same as those provided in Section of the UBC and Part 12 of the ANSI/AF&PA NDS-91 Revised and NDS National Design Specification for Wood Construction (NDS), for sawn lumber. Spacing of nails and staples installed parallel to the glue lines on the narrow face of the material is limited as shown in Table 13 of this report. Other nail spacings for specific applications, such as prefabricated steel components or hangers, may be used as detailed for Microllam LVL in a current ICC-ES evaluation report or ICC- ES Legacy Report. Allowable loads for machine bolts installed perpendicular to the wide face of Microllam LVL (perpendicular to the glue

3 Page 3 of 13 lines), with loads applied parallel or perpendicular to the grain of the wood veneers, are the same as those provided in the applicable code for sawn lumber having a minimum specific gravity of 0.50, such as for Douglas fir-larch Microllam LVL Rim Board Applications: The Microllam LVL Rim Board product is permitted to be used in rim board applications as described in Section of this report. Toenailed connections are not limited by the 150 plf lateral load capacity noted for seismic zones 3 and 4 in Section of the UBC, or seismic design categories D, E and F in Section of the IBC. The ability of Microllam LVL rim board to transfer shear is described in Footnote 1 to Table 9 of this report Fire Resistance: The fire resistance of Microllam LVL is equivalent to that of sawn lumber of equal depth and width when used in Type IV heavy-timber-construction. 2.5 TJ-Strand Rim Board and e-rim Board: TJ-Strand Rim Board and e-rim Board are oriented strand board (OSB) materials manufactured by either the Weyerhaeuser Company or J. M. Huber Corporation, and are permitted to be used in rim board applications defined in Section of this report. The OSB material is an alternative material qualified under Section of the UBC, Section of the IBC, Section R of the IRC, Section of the NBC and Section of the SBC. TJ-Strand Rim Board is available in a thickness of 1 1 / 4 inches (31.7 mm), depths up to 16 inches (406 mm), and lengths up to 24 feet (7315 mm). e-rim Board is available in thicknesses of 1 inch or 1 1 / 8 inches (25.4 or 28.6 mm), depths up to 11 7 / 8 inches (302 mm), and lengths up to 24 feet (7315 mm). Allowable stress design stresses and vertical load capacities for TJ- Strand Rim Board and e-rim Board are shown in Table 6; allowable fastener details are shown in Table 7; and minimum nail spacing is shown in Table 8. Toenailed connections are not limited by the 150 plf lateral load capacity noted for seismic zones 3 and 4 in Section of the UBC, or seismic design categories D, E and F in Section of the IBC. The ability of TJ-Strand Rim Board to transfer shear is described in Footnote 1 to Table 7 of this report. The ability of e-rim Board to transfer shear is described in Footnote 2 to Table 7 of this report Fire Resistance: TJ-Strand Rim Board and e-rim Board are permitted to be used in lieu of conventional wood, for fire blocking. 2.6 SpaceMaker Truss: General: The SpaceMaker Truss is a proprietary, fieldassembled truss for use in residential construction. The truss configuration is a simple truss with top and bottom chords, a collar tie, and vertical web members that permit the construction of additional living space that would normally be attic space. See Figure 1 for details of the SpaceMaker Truss configuration and truss member dimensions. The truss configuration and truss member sizes are based on selected spans, roof slopes, and design loads. The following four spans are recognized: , 26 and 28 feet (6706, 7315, 7925 and 8534 mm). Span is defined as the distance from face to face of supports, plus one half the required length of bearing at each end. Maximum cantilever of the heel joist beyond face of support is 30 inches (762 mm). Roof slopes are limited to 10:12 (83.33% slope) and 12:12 (100% slope) (vertical:horizontal) Design Assumptions: Design of the SpaceMaker truss complies with Chapters 16 and 23 of the UBC and IBC, respectively for allowable stress design, and with Section R301 of the IRC. Truss member configuration and sizes are based on the following design assumptions: 1. Floor live load = 40 psf (1.9 kn/m 2 ). 2. Floor dead load = 13 psf (0.6 kn/m 2 ). 3. Roof snow load = 30 psf (1.4 kn/m 2 ). In accordance with Formula 14-1 of Section 1614 of the UBC, Section of the IBC and Table R301.2a of the IRC, snow exposure factor (C e ) = 1.0, snow load importance factor (I) = 1.0, thermal factor (C t ) = 1.0, snow load reduction is used in the design of the 10:12 (83.33% slope) and 12:12 (100% slope) pitched trusses. 4. Roof dead load = 15 psf (0.7 kn/m 2 ). 5. Wind loading = Mean roof height = 17 feet (5182 mm); Exposure C; basic wind speed = 80 mph (129 km/h); importance factor = Top chord deflection: Limit for live load < L/240. Limit for total load < L/ Bottom chord deflection: Limit for roof total load plus floor total load < L/240. Limit for roof live load plus floor live load < L/180. Limit for floor live load < L/ Bottom chord stiffness is based on composite action of the chord member and a single layer of code-approved, span-rated, wood-based sheathing that is glued and nailed to the truss bottom chord. 9. Truss design includes a code-allowable increase for repetitive-use members. 10. The top plate support member must have a minimum allowable compression perpendicular to grain value of 470 psi (3.24 MPa) and must have a minimum width of 3 1 / 2 inches (89 mm). The allowable compression perpendicular to grain is not permitted to be increased for duration of load. 11. Seismic design category is determined by analysis Installation: Trusses are field-assembled in accordance with the details shown in Figure 2. Maximum truss spacing is 24 inches (610 mm) on center. Where truss spacing must be greater than 24 inches (610 mm) on center, such as around stairways and dormer openings, two trusses are connected together, to form a double truss, and used at those locations. Maximum distance between double trusses is 69 inches (1753 mm). The bottom chord of the truss must be sheathed in both the habitable space and storage space with minimum 40/20 span-rated, tongue and groove sheathing (Exposure 1) for trusses spaced up to 19.2 inches (488 mm) on center or less, and minimum 48/24 span-rated, tongue and groove sheathing (Exposure 1) for trusses spaced at 24 inches (610 mm) on center. The floor sheathing must be attached to the bottom chord members with AFG-01 construction adhesive and nails. Size and spacing of nails must be in accordance with the applicable code. Minimum nail spacing is shown in Table 9. The SpaceMaker Truss product specifications and design loads are given in Tables 11 and 12. The SpaceMaker Truss bottom chord and vertical web members are permitted to have holes as shown in Figure Identification: TimberStrand LSL, Parallam PSL, and Microllam LVL are identified with a stamp noting the name of the manufacturer (Trus Joist) and the plant number; the product trade name; the production date; the grade; the evaluation report number (ICBO ES ); and the name or logo of the quality control agency (PFS Corporation). Microllam LVL and

4 Page 4 of 13 Parallam PSL are also identified with the species, or species group designation. Additionally TimberStrand LSL treated with zinc borate as described in Section of this report is identified with the designations StrandGuard and AWPA UC2. TimberStrand LSL rim board is identified by the designation 1.3E TimberStrand LSL Rim Board, in addition to the required identification for TimberStrand LSL. Microllam LVL produced at the Trus Joist plants identified in Section 4.9 of this report is also identified with the marking AGS following the grade designation, if the advanced grading system specified in the approved quality control manual was used in the manufacturing process. Microllam LVL Rim Board is identified by a stamp that includes the Trus Joist logo; the production date; the plant number; the evaluation report number (ICBO ES ); the thickness; the designation Microllam LVL Rim Board ; and the name or logo of the quality control agency (PFS Corporation). TJ-Strand Rim Board material is identified by a stamp having the Trus Joist logo; the production date and shift; the plant number; the evaluation report number (ICBO ES ER- 4979); the designations; TJ-Strand and E Rim Board ; and the name or logo of the quality control agency (PFS Corporation). e-rim Board is identified by a stamp containing the Trus Joist logo; the production date and shift; the plant number; the evaluation report number (ICBO ES ); the thickness and the designations e-rim and Rim Board ; and the name or logo of the quality control agency (PFS Corporation). The SpaceMaker Truss is identified by a label on the bottom chord indicating the product name (SpaceMaker ); the manufacturer s name (Trus Joist); the product series number; the evaluation report number (ICBO ES ): the allowable span; the roof pitch; and the logo or name of the quality control agency (PFS Corporation). 3.0 EVIDENCE SUBMITTED Data in compliance with the ICBO ES Acceptance Criteria for Structural Composite Lumber (AC47), dated January 1996; data in compliance with ICBO ES Acceptance Criteria for Wood-Based Rim Board Products (AC124), dated January 1997: reports of fire tests; installation details; and manufacturing standards and quality control manuals. Data in accordance with ICBO ES Acceptance Criteria for Zinc Borate Preservative Treatment of Structural Composite Lumber by Non-pressure Process (AC203), dated July FINDINGS That the Structural Composite Lumber [TimberStrand Laminated Strand Lumber (LSL), Parallam Parallel Strand Lumber (PSL), and Microllam Laminated Veneer Lumber (LVL)]; Microllam LVL Rim Board; TJ-Strand Rim Board; e-rim Board; and SpaceMaker Truss products described in this report comply with the 1997 Uniform Building Code, the 2000 International Building Code, the 2000 International Residential Code (IRC), the BOCA National Building Code/1999 and the 1999 Standard Building Code, subject to the following conditions: 4.1 Design Stresses comply with the values noted in this report. 4.2 Calculations must be furnished to the building official, verifying that the material is used in accordance with this report. 4.3 TimberStrand LSL, Parallam PSL and Microllam LVL are limited to end-use locations at which the average equilibrium moisture content of the structural composite lumber is equal to or less than 16 percent. 4.4 Increases for duration of load, as provided for wood members and their connections, are permitted in accordance with the limitations specified in the applicable code and as set forth in this report. 4.5 Where members qualify as repetitive members, as defined in Part of the NDS-1991 Revised or NDS-1997, an increase of four percent is permitted in allowable bending stresses. 4.6 TimberStrand LSL, Parallam PSL and Microllam LVL beams may not be cut or notched and may be bored only as follows; when supporting uniform loads only, maximum 1.0 inch diameter (25.4 mm) holes may be drilled in minimum 4 3 / 8 -inch-deep (112 mm) beams, maximum 1 3 / 4 -inch-diameter (44.5 mm) holes may be drilled in minimum 5 1 / 2 -inch-deep (140 mm) beams and maximum 2.0 inch diameter (51 mm) holes may be drilled in minimum 7 1 / 4 -inch-deep (184 mm) beams. All holes must be located in the center third of the beam span and the center third of the beam depth. The minimum clear distance between holes must be two times the diameter of the largest hole. Rectangular holes are not permitted. Holes in cantilevers are beyond the scope of this report. 4.7 TimberStrand LSL is produced at the Trus Joist manufacturing plants located in Deerwood, Minnesota; Chavies, Kentucky (East Kentucky Plant); and Kenora, Ontario, Canada, with quality control inspections by PFS Corporation (AA-652). 4.8 Parallam PSL is produced at the Trus Joist manufacturing plants located in Annacis Island, British Columbia, Canada; Buckhannon, West Virginia; and Colbert, Georgia; with quality control inspections by PFS Corporation (AA-652). 4.9 Microllam LVL is produced at the Trus Joist manufacturing plants located in Albany, Oregon; Buckhannon, West Virginia; Eugene, Oregon; Junction City, Oregon; Natchitoches, Louisiana; Stayton, Oregon; Valdosta, Georgia (Lowndes County Plant); Castleberry, Alabama (Evergreen Plant); and Simsboro, Louisiana: with quality control inspections by PFS Corporation (AA-652) TJ-Strand Rim Boards are produced by the Weyerhaeuser Company at their manufacturing plants located in Elkin, North Carolina, and Drayton Valley, Alberta, Canada; and are produced by the J. M. Huber Corporation at their manufacturing plants located in Commerce, Georgia, and Whites Creek, Tennessee; with quality control inspections by PFS Corporation (AA-652) e-rim Board is produced by the Weyerhaeuser plants located in Elkin, North Carolina, and Drayton Valley, Alberta, Canada; with quality control inspections by PFS Corporation (AA-652) SpaceMaker Truss components are produced at the Trus Joist manufacturing plant located in Boise, Idaho, with quality control inspections by PFS Corporation (AA-652). This report is subject to re-examination in two years.

5 Page 5 of 13 Grade MOE (x 10 6 ) TABLE 1 - TimberStrand 1, 2, 3 LSL STRUCTURAL FRAMING LUMBER DESIGN STRESSES (pounds per square inch) Axial Joist/Beam Plank Ft 5 Fc Fb 6, 7 Fv Fc 8 Fb 4 Fv Fc For SI: 1 psi = MPa 1. See figure below for description of strand orientation. 2. Allowable stresses are based on covered, dry conditions of use, defined as those environmental conditions represented by sawn lumber with an equilibrium moisture content less than 16%. 3. For uniformly loaded simple span beams, deflection is calculated as follows: 4 270WL 28. 8WL = + 3 Ebd Ebd 2 Where: = Deflection, inches W = Uniform load, plf L = Span, feet b = Beam width, inches d = Beam depth, inches E = Modulus of Elasticity, psi 4. Values shown are for thicknesses up to 3.5 inches. 5. The Ft values in the table are reduced to reflect the volume effects of length, width and thickness for a range of common application conditions. The Ft values for TimberStrand LSL may be higher when approved by Trus Joist for use as a component of engineered products, which are manufactured under a recognized quality control program. 6. For depths other than 12 inches regardless of thickness, table values must be multiplied by (12/d) Adjustments for common depths are shown below. For depths less than 3.5 inches, the factor for the 3.5 inch depth must be used. Depth (inches) Multiplier When structural members qualify as repetitive members in accordance with the building code, a four percent increase is permitted for Fb, in addition to the increases permitted in Footnote 6, above. 8. Compression perpendicular to grain values (Fc ) may not be increased for duration of load. 9. When 1.7E grade TimberStrand LSL is used as truss chords and webs of engineered wood trusses the design axial tension is 2050 psi. This value includes an adjustment for length effect. The TimberStrand LSL material must be marked as Truss Chord Grade, and the engineered wood trusses must be manufactured under a recognized quality control program. The plate tooth-holding values for TimberStrand LSL web and chord members are as recognized in other evaluation reports.

6 Page 6 of 13 TABLE 2 - TimberStrand LSL FASTENER DETAILS Fastener Description Comments Lateral Nail and Wood Screw Capacity Nail Withdrawal Capacity Edge: Parallel and Perpendicular to grain Face: Parallel and Perpendicular to grain Edge Face For all grades 1.3E and higher use specific gravity, SG = 0.50 (Douglas-fir-larch). For all grades 1.3E and higher use specific gravity, SG = 0.42 (S-P-F). For all grades 1.3E and higher of Yellow Poplar 6 TimberStrand LSL use specific gravity, SG = 0.55 (Southern Pine). For all grades 1.3E and higher use specific gravity, SG = 0.50 (Douglas-fir-larch). For all grades 1.3E and higher of Yellow Poplar 6 TimberStrand LSL use specific gravity, SG = 0.55 (Southern Pine). Bolt Capacity - Bolt parallel to WFS: Not evaluated Bolt capacity - Bolt perpendicular to WFS 1 Load parallel to grain For all grades 1.3E and higher use specific gravity, SG = 0.50 (Douglas-fir-larch). Load perpendicular to grain For all grades 1.3E and higher use a specific gravity, SG = 0.58 (Red Maple). Lag bolt capacity-½ inch diameter-bolt perpendicular to WFS Load: Parallel and Perpendicular to grain 400 lbs. 2 Note: Nail and bolt design values are developed using the specific gravity shown, in accordance with the applicable code. 3, 4, 5 Closest On Center Nail Spacing Parallel To WFS Orientation Member Thickness (inches) Common Nail Size 1 1/4 1 1/2 and 1 3/4 2 1/2 3 1/2 1 row 1 row 2 rows 1 row 2 rows 1 row 2 rows 3 rows 8d / d / d /2 3 1/2 3 1/2 3 1/2 -- For SI: 1 inch = 25.4 mm 1 lbf. = N 1. When loading at an angle to grain, the lateral capacity is calculated using the Hankinson formula using an equivalent SG = 0.50 for load parallel to grain and equivalent SG = 0.55 for load perpendicular to grain pounds is the lateral load permitted for 1/2 inch diameter lag bolt in 1 1/2 inch thick main and side members with full penetration into the main member. Lateral load capacities for other lag bolt sizes and conditions to be evaluated in accordance with the 1997 Uniform Building Code, using an equivalent SG = 0.50 for load parallel to grain and equivalent SG = 0.55 for load perpendicular to grain. For capacities at an angle to grain refer to Footnote 1, above. Capacities in withdrawal have not been evaluated. 3. The closest on center spacing for nails perpendicular to WFS is the same as permitted by the code for sawn lumber. 4. Multiple rows to be staggered and the minimum spacing between rows must be 1/2 inch. 5. Multiple rows to be equally spaced from the centerline of the narrow face axis. 6. TimberStrand LSL identified with a circled 45 (plant number) as part of the product label. TABLE 3-1.3E TimberStrand 1, 2, 3 LSL RIM BOARD Thickness (inches) Allowable Vertical Load (PLF) 4 Depth Range (inches) and less over 16 up to up to 24 For SI: 1 inch = 25.4 mm 1 plf = N/m 1. The allowable shear values in pounds per foot for horizontal wood structural panel diaphragms with framing of nominal 2 inch thick Douglas fir-larch or southern pine are applicable to: (1) 1.25 inch thick TimberStrand LSL Rim Board, unblocked diaphragms only, and (2) 1.50 inch thick TimberStrand LSL Rim Board, unblocked and blocked diaphragms. 2. TimberStrand LSL Rim Board must be laterally supported at the top and continuously supported at the bottom, and the gravity loads must be uniformly applied along the top, in lieu of design by a design professional for other conditions. 3. Fastener capacities for TimberStrand LSL Rim Board are as given in Table 2, except as provided in Footnote 5, below. 4. Compression perpendicular-to-grain capacities of the sill plate and floor sheathing must be checked. 5. Decrease 1/2 inch diameter lag screw allowable to 325 lbs.

7 Page 7 of 13 TABLE 4 - Parallam PSL ALLOWABLE FRAMING LUMBER DESIGN STRESSES 1, 2, 3 (pounds per square inch) Species / Grade Axial Load ll To WFS (Joist) Load To WFS (Plank) MOE (x10 6 ) Ft 4 Fc Fb 5, 6 Fv F c 7 Fb 5, 6 Fv F c 7 DF 1.8E E E E SP 1.8E E E E WH 1.8E E E E YP 1.8E or 1.9E YP/RM 2.0E E For SI: 1 psi = MPa 1. WFS - Wide face of strand. See figure below for details on strand orientation. DF = Douglas fir-larch, SP = southern pine, WH = western hemlock, YP = yellow poplar, RM = red maple. DF and WH are permitted to be combined as Western Species (WS). SP, YP and YP/RM are permitted to be combined as Eastern Species (ES). When using the species group designations WS or ES, the allowable stresses must be the lower values for the species in the group. 2. Allowable stresses are based on covered, dry conditions of use. Dry conditions of use are those environmental conditions represented by sawn lumber at which the moisture content is less than 16%. 3. For uniformly loaded simple span beams, the deflection is calculated as follows: 4 270WL 28. 8WL = + 3 Ebd Ebd Where, = Deflection, inches W = Uniform load, plf L = Span, feet b = Beam width, inches h = Beam depth, inches E = Modulus of Elasticity, psi 2 4. The Ft values in the table are reduced to reflect the volume effects of length, width and thickness for a range of common application conditions. 5. For 12 inch depth; for other depths, table value must be multiplied by (12/d) Adjustments for common depths are shown below. For depths less than 3.5 inches, the factor for the 3.5 inch depth must be used. Depth (inches) Multiplier When members qualify as repetitive members in accordance with the building code, a 4 percent increase is permitted, for Fb, in addition to the increases permitted in Footnote 4, above. 7. Compression perpendicular to grain values (Fc ) may not be increased for duration of load. 8. When used in cross-sections with depths of 20 inches or greater, through approved secondary lamination, the MOE is 2.20 x 10 6 psi.

8 Page 8 of 13 MOE TABLE 5 - Microllam LVL ALLOWABLE FRAMING LUMBER DESIGN STRESSES 1, 2, 3 (pounds per square inch) BILLET GRADE AXIAL JOIST/BEAM PLANK (1) MATERIAL SPECIES 1 THICKNESS Ft 4 Fc Fb 5,6 Fv 7 (x10^6) Fc 8 Fb 9 Fv Fc 8 3/4 inch 1.6 DF/LP/WH to 1.8 DF/LP/WH /4 inch 1.9 DF/LP/WH DF/LP/WH DF/LP/WH DF/LP/WH DF/LP/WH /8 inch 1.6 DF/LP/WH to 1.8 DF/LP/WH /2 inch 1.9 DF/LP/WH DF/LP/WH DF/LP/WH DF/LP/WH DF/LP/WH /4 inch 1.8 SP to 1.9 SP /2 inch 2.0 SP SP SP SP /4 inch 1.6 YP to 1.8 YP /2 inch 1.9 YP YP YP /4 inch to 1-3/4 inch 2.0E-2925Fb SP For SI: 1 psi = MPa 1. Allowable stresses are based on covered, dry conditions of use. Dry conditions of use are those environmental conditions represented by sawn lumber at which the moisture content is less than 16%. 2. For uniformly loaded simple span beams, deflection is calculated as follows: WL 28. 8WL = + 3 Ebd Ebd where: W = Uniform load, plf b = Beam width, inches = Deflection, inches d = Beam depth, inches L = Span, feet E = Modulus of Elasticity, psi 3. DF = Douglas fir-larch; LP = lodgepole pine; WH = western hemlock; SP = southern pine: YP = yellow poplar. DF, LP and WH are permitted to be combined as Western Species (WS). SP and YP are permitted to be combined as Eastern Species (ES). When using the species group designations WS or ES, the allowable stresses must be the lower values for the species in the group. 4. The F t values in the table are reduced to reflect the volume effects of length, width and thickness for a range of common application conditions. Therefore the F t values in the Table do not apply to Microllam LVL when used as a component of engineered products manufactured by Trus Joist which are listed in other evaluation reports. 5. Fb includes allowances for variations in span to depth ratio and method of loading and must be used without further adjustment except as noted below. For depths other than 12 inches, regardless of thickness, table values must be multiplied by (12/d) Adjustments for common depths are shown below. For depths less than 3.5 inches, the factor for the 3.5 inch depth must be used. Depth Multiplier When structural members qualify as repetitive members in accordance with the building code, a four percent increase is permitted, in addition to the increases permitted in Footnote 5, above. This increase does not apply to field assembled multimember beams. 7. For simplicity, use 285 psi for depths up to 24 inches and 260 psi for depths greater than 24 inches. When a more accurate analysis is desired, the allowable horizontal shear for all depths greater than 12 inches is Fv = 285 (12/d) Compression perpendicular to grain values (Fc ) may not be increased for duration of load. 9. Values shown are for thicknesses up to 3.5 inches.

9 Page 9 of 13 TABLE 6. TJ-Strand RIM BOARD 1 and e-rim Board CAPACITIES Design Stresses (pounds per square inch) Allowable Rim Board Material Thickness (inches) MOE x 10 6 Fb 1 Fv Fc 2 Vertical Load (plf) 3, 4 Depth Range (inches) TJ-Strand and less e-rim /8 and less /8 and less For SI: 1 inch = 25.4 mm 1 psi = MPa 1 plf = N/m 1. No depth modification applies for depths of 16 inches and less. 2. Compression perpendicular to grain value may not be increased for duration of load. 3. TJ-Strand Rim Board must be laterally supported at the top and continuously supported at the bottom, and the gravity loads must be uniformly applied along the top, in lieu of design by a design professional for other conditions. 4. Compression perpendicular-to-grain capacities of the sill plate and floor sheathing must be checked. TABLE 7. TJ-Strand RIM BOARD 1 and e-rim BOARD 2 FASTENER DETAILS Fastener Description Comments Lateral nail and screw capacity Edge: Parallel and perpendicular SG = 0.50 (Douglas fir-larch) for TJ-Strand Rim Board SG = 0.42 (S-P-F) for e-rim Board Face: Parallel and perpendicular SG = 0.50 (Douglas fir-larch) Bolt Capacity perpendicular to WFS 3 Load perpendicular to grain SG = 0.50 (Douglas fir-larch) Lag Bolt Capacity - 1/2 diameter bolt Load perpendicular to grain 325 lbs. 4 perpendicular to WFS SG = 0.50 (Douglas fir-larch) Note: Nail bolt design values are developed using the specific gravity shown, in accordance with the applicable code. For SI: 1 lbf. = N 1. The allowable shear values in pounds per foot for unblocked horizontal wood structural panel diaphragms with framing of nominal 2 inch thick Douglas fir-larch or southern pine noted in Table 23-II-H of the UBC; Table of the NBC; Table A of the SBC; and Table of the IBC are applicable to TJ-Strand Rim Board only. 2. e-rim Board is permitted for use as rim board material in structures complying with the conventional construction requirements as defined in Section 2320 of the UBC, Section 2308 of the IBC and Section R502 of the IRC. 3. When loading at an angle to grain, the lateral capacity is calculated using the Hankinson formula and an equivalent SG = 0.50 for load parallel to grain and equivalent SG = 0.55 for load perpendicular to grain lbs. Is the lateral load permitted for 1/2 inch diameter lag bolt in 1 1/4 inch thick main and 1 1/2 inch thick side members with full penetration into the main member. Lateral load capacities for other lag bolt sizes and conditions to be evaluated in accordance with the 1997 Uniform Building Code, using an equivalent SG = 0.50 for load parallel to grain and equivalent SG = 0.55 for load perpendicular to grain. For capacities at an angle to grain refer to Footnote 3, above. Capacities in withdrawal have not been evaluated. TABLE 8. TJ-Strand RIM BOARD and e-rim BOARD CLOSEST ON CENTER NAIL SPACING PARALLEL TO WFS ORIENTATION 1 (inches) Box Common Nail Size TJ-Strand Rim Board e-rim Board TJ-Strand Rim Board e-rim Board 8d (2 1/2 ) d (3 ) d 2 (3 1/4 ) d sinker (3 1/4 ) d (3 1/2 ) For SI: 1 inch = 25.4 mm 1. The closest on center spacing for nails perpendicular to WFS is the same as permitted by the code for sawn lumber. 2. When nailing through the wall sill plate and floor sheathing, the closest on center nail spacing is 4 inches (1 3/8 inch maximum penetration). 3. When nailing through the wall sill plate and floor sheathing, the closest on center nail spacing is 5 inches (1 3/8 inch maximum penetration). TABLE 9 Microllam 1, 2, 3 LVL RIM BOARD Thickness (inches) Allowable Vertical Load (PLF) 4 Depth Range (inches) /8 and less For SI: 1 inch = 25.4 mm 1 plf = N/m 1. The allowable shear values in pounds per foot for horizontal wood structural panel diaphragms with framing of nominal 2 inch thick Douglas fir-larch or southern pine noted in Table 23-II-H of the UBC; Table of the NBC; Table A of the SBC; and Table of the IBC are applicable to 1.25 inch thick Microllam LVL Rim Board, unblocked diaphragms only. 2. Microllam LVL Rim Board must be laterally supported at the top and continuously supported at the bottom, and the gravity loads must be uniformly applied along the top, in lieu of design by a design professional for other conditions. 3. Fastener capacities for Microllam LVL Rim Board are as recognized in Section of this report, except as provided in footnote 5 below. 4. Compression perpendicular-to-grain capacities of the sill plate and floor sheathing must be checked. 5. The allowable lateral load capacity of a 1/2 diameter lag screw installed perpendicular to the veneers and loaded perpendicular to grain is 325 lbs

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13 Page 13 of 13 TABLE 11. SpaceMaker Truss PRODUCT SPECIFICATION TABLE 10:12 PITCH Rated Span Minimum Span (with 2 cantilevers) Room Width, feet Storage Area Width / /8 Ceiling Height / /2 Knee Wall Height 3-5 1/ / / /4 Heel Height 8 1/4 8 1/4 9 1/16 9 1/16 Minimum Overhang 4 3/16 4 3/16 3 3/4 3 3/4 Truss Weight (lbs.) :12 PITCH Rated Span Minimum Span (with 2 cantilevers) Room Width, feet Storage Area Width / /8 Ceiling Height / / /2 Knee Wall Height 4-9 1/ / / /8 Heel Height 9 1/8 9 1/ Minimum Overhang 4 3/8 4 3/8 4 1/16 4 1/16 Truss Weight (lbs.) For SI: 1 inch = 25.4 mm 1 foot = mm 1 lbf. = N 1. Room widths, ceiling heights and kneewall heights shown in this Table refer to rough inside framed dimensions. Habitable space must have a ceiling height of not less than 7.5 feet (2286 mm) except where permitted by section of the UBC, Section of the IBC or Section R304.4 of the IRC. TABLE SpaceMaker Truss DESIGN LOAD TABLE DESIGN LOADS, psf Live Load Dead Load 1 Floor full length of bottom chord Roof (125%) 24 o.c Roof (115%) 24 o.c Roof (115%) 19.2 o.c Roof (115%) 16 o.c For SI: 1 psf = kpa 1. Includes 3 psf truss weight. 2. A reduction of the basic roof snow load (30, 37 and 45 psf) has been taken for truss design due to roof slope, in accordance with Section of this report. TABLE 13 SPACING OF NAILS AND STAPLES IN Microllam LVL Microllam LVL DIMENSIONS Minimum 3/4 inch thick and 3 1/2 inches deep Minimum 1 1/2 inches thick and 3 1/2 inches deep For SI: 1 inch = 25.4 mm. FASTENER (Installed parallel to glue lines on the narrow face of the material) MINIMUM SPACING (inches) 8d nail 3 10d nail 4 12d nail 4 No. 14 gage staple 4 10d nail 4 12d nail 4 16d nail 8 No. 14 gage staple 4