Attic Design Loads
Analysis of an attic truss requires multiple load cases with multiple duration factors.
Attic design loads. Attic truss analysis the truss shown below is known as an attic truss or a room in attic truss. 3the transverse wind load for stud design is based on a localized component and cladding wind pressure. When used for storage only dead load of attic floor not floored 10 lbs. 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.
Live load on attic floor local requirements. Two ansi standards appear to cover attic ladders. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes. The ceiling load may include items like drywall ducts recessed lights bathroom fans and attic insulation.
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. Ft dead load of roof of wood shingle construction 10 lbs. Girder load width half joist span live load on roof local requirements for wind and snow. This section states that the minimum design live load shall be two loads of 250 pounds each concentrated between any two consecutive attachments.