Attic Design Loads
3the transverse wind load for stud design is based on a localized component and cladding wind pressure.
Attic design loads. The ceiling load may include items like drywall ducts recessed lights bathroom fans and attic insulation. This section states that the minimum design live load shall be two loads of 250 pounds each concentrated between any two consecutive attachments. When used for storage only dead load of attic floor not floored 10 lbs. Attics that have no flooring unless expressly built so an attic s joists are meant for carrying the load of the ceiling below and related elements collectively known as the dead load.
Analysis of an attic truss requires multiple load cases with multiple duration factors. D w provides an adequate and. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of other elements in the load path. This type of truss carries a combination of roof l r or s and floor l loading in addition to the standard top and bottom chord dead loads.
Girder load width half joist span live load on roof local requirements for wind and snow. Ft dead load of roof of wood shingle construction 10 lbs. Live load on attic floor local requirements. Two ansi standards appear to cover attic ladders.