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Lumber Testing 10 4 12
Lumber Testing 10 4 12
Post Capacities
HD3B Vertical Installation
HTT4 Vertical Installation
Typical CBSQ-SDS2 Installation
HDU Vertical Installation
Post Allowable Loads
Post Tension Loads for Douglas-Fir-Larch
See footnotes below.
Post Tension Loads for Southern Pine
Post Tension Loads for Spruce-Pine-Fir
See footnotes below.
Post Tension Loads for Hem-Fir
Post Allowable Compression Loads for Douglas-Fir-Larch
See footnotes below.
Post Allowable Compression Loads for Southern Pine
See footnotes below.
Post Allowable Compression Loads for Spruce-Pine-Fir
See footnotes below.
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Post Allowable Compression Loads for Hem-Fir
- The allowable (ASD) loads are based on the 2015 National Design Specification for Wood Construction (NDS).
- Post heights are based on standard precut stud heights and associated top plate heights. Wall height is nominal height plus 1 1/8″. Effective post lengths, le, are the actual wall height minus the thickness of (3) 2x plates (4 1/2″).
- Shaded values are limited by the perpendicular-to-grain bearing load, Pc⊥, when posts bear on wood sill plates. Where posts and sill plates are different species, Designer shall limit allowable load to the lower of the post or the perpendicular-to-grain load for each species used.
- Perpendicular-to-grain allowable loads do not include the NDS Bearing Area Factor, Cb. For posts whose bearing area is not closer than 3″ from the end of a sill plate, the Pc⊥ values may be multiplied by Cb.
T = Bearing Length (post thickness)
Cb = Bearing Area Factor per NDS 3.10.4 - Parallel-to-grain values listed. Assume strong axis buckling.
- Tension loads are based on net section assuming hole size equal to bolt diameter plus 1⁄16″. Tension loads have been increased for wind or seismic loading with no further increase allowed; reduce where other loads govern.
- Values do not consider combined axial and out-of-plane bending.
- Bolt diameter “None” indicates full cross-section.
How Far Can a 2X4 Span Without Support?
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