4.4 KiB
4.4 KiB
Wood Framing Specifications
General
- Wood framing sizes, firestops, anchorage, furring, and connectors not shown on the construction documents shall, at a minimum, adhere to prescriptive design requirements per the building code.
Structural Lumber – Permanently Conditioned Spaces
Structural lumber in permanently conditioned spaces shall meet or exceed the following grades, species, and product lines:
Studs
- Stud grade Southern Yellow Pine
- Stud grade Douglas Fir-Larch
- Vertical studs may use certified finger-jointed Hem-Fir, Southern Pine, or Douglas Fir
- HRA (Heat Resistant Adhesive) required for studs in fire-resistance rated assemblies.
Joists
- No.2 grade Southern Yellow Pine
- No.2 grade Douglas Fir-Larch
Laminated Veneer Lumber (LVL) – Beam/Header/Girder
- Weyerhaeuser 2.0E Microlam LVL
- Boise Cascade Versa-Lam 2.0E, 3100Fb
Glued Laminated (Glulam) – Beam/Header/Girder
- 3½" & 5½" wide: Anthony Power Beam 3000Fb – 2.1E – 300Fv
- 7" wide: Anthony Power Beam 2800Fb – 2.1E – 300Fv
Rafters
- No.2 grade Southern Yellow Pine
- No.2 grade Douglas Fir-Larch
- No.2 grade Structural Finger-Jointed Hem-Fir, Southern Pine, or Douglas Fir
- HRA designation required in fire-rated assemblies.
Posts
- Dimensional lumber/timbers: No.2 grade Southern Yellow Pine or Douglas Fir-Larch
- Parallel Strand Lumber (PSL): TrusJoist 1.8E Parallam PSL posts
Plates
- No.3 grade Southern Yellow Pine
- No.3 grade Douglas Fir-Larch
Blocking
- No.3 grade Southern Yellow Pine
- No.3 grade Douglas Fir-Larch
Structural Lumber – Non-Permanently Conditioned Spaces
Dimensional Lumber
- Same species and grades as above, pressure-treated.
Glued Laminated (Glulam) Beams/Headers/Girders
- Power Preserved Glulam Beam (24F-V5M1/SP) treated with:
- CopperGuard at 0.04 pcf, or
- Clear-Guard at 0.055 pcf
Wood Structural Panels
General
- Used for siding, roof/wall sheathing, subflooring, diaphragms, and built-up members.
- Shall be APA performance-rated per DOC PS 1, DOC PS 2, or ANSI/APA PRP 210.
- Panels must display grade, bond classification, and performance category by an approved grading agency.
- Performance category value shall be used as nominal panel thickness.
Panel Types
- Subfloor: 23/32" APA-rated Sturd-I-Floor, 24" o.c., Exposure 1
- Sheathing/Decking: 7/16" APA-rated sheathing, 32/16, Exposure 1 (unless noted otherwise, see shear wall schedule)
Exterior Exposure
- Panels permanently exposed outdoors must be exterior type, except roof sheathing exposed on underside may be Exposure 1 type.
Moisture and Drying
- All lumber shall be kiln-dried to a maximum moisture content of 19%.
Glued Laminated (Glulam) Members
- Shall comply with ANSI A190.1 and ASTM D3737.
- Typical manufacturer: Anthony Power Beam, 3000Fb – 2.1E.
Lumber Identification
- All lumber shall bear the grade mark from a grading or inspection agency accredited per DOC PS 20.
Preservative Treatment and Fasteners
- All wood in contact with concrete or exposed to weather must be preservative-treated.
- All fasteners (anchor bolts, power-actuated fasteners, nails, clips, hangers) attached to treated wood must be approved for the environment.
Nails and Staples
- Shall conform to ASTM F1667.
- Minimum average bending yield strengths:
| Shank Diameter | Minimum Bending Yield Strength |
|---|---|
| 0.177 – 0.254" (4.50 – 6.45 mm) | 80 ksi (551 MPa) |
| 0.142 – 0.177" (3.61 – 4.50 mm) | 90 ksi (620 MPa) |
| 0.099 – 0.142" (2.51 – 3.61 mm) | 100 ksi (689 MPa) |
Fasteners for Fire-Retardant Treated Wood
- Must be hot-dipped galvanized steel or stainless steel.