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Residential Loading. The house acts as a structural system resisting dead loads (weight of materials), live loads (weights imposed by use and occupancy), like snow loads and wind loads. Beams, studs, joists and rafters act as a structural skeleton and must be strong enough and stiff enough to resist these loads.
25 Οκτ 2024 · Use this wood beam span calculator to check a wood beam of a particular size and length to see if it can support a given uniform linear load by comparing its allowable and required bending and shear stress.
Calculate the size needed for a beam, girder, or header made from No. 2 pine or LVL. Covers any span and every load with pin point accuracy. Double check yourself with these span charts. Works with evenly distributed loads only.
Knowing how to cut roof rafters gives Pros an edge when framing a roof, from small sheds to large homes. (See the roof framing diagram above for the parts of a rafter frame.) Begin gable roof framing by making the following calculations for sizing the rafters. The roof span is the width between the exterior walls.
Use the span tables in the links below to determine the maximum allowable lengths of joists and rafters. These tables provide maximum spans for the #2 grades of four common species of lumber (Southern Pine, Douglas Fir, Hem-fir, and Spruce-pine-fir (SPF).
Wood framing is the material of choice for residen-tial construction and is increasing its market share in non-residential construction. Wood frame construction design relies on the lumber design values and allow-able span tables published in building codes and stan-dards, and industry technical publications.
Rafter spans are tabulated for the most common roof loads. The loads are based on adjusted roof snow loads from the governing building code. For roof live loads less than 20 pounds per square foot (psf), rafter spans and required E values tabulated for 20 psf shall be permitted to be adjusted in accordance with the fol-lowing table:
