Eng Tips Attic Lateral Design

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.

Eng tips attic lateral design.

Lateral stability aspect ratio d b b d d b 2 no lateral support required b d 2 4 ends held in position b d 5 6 laterally restrain ends and at intervals along length of less than 8ft. If these requirements. 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. They are legally backed by the engineering profession.

Loads govern the lateral design of the building. Mapped spectral response accelerations s s and s 1. Spectral response coefficients s ds and s d1. And compression edge held in position with sheathing b d 6 7 laterally restrain ends both compression and tension sides.

K 1 probability factor risk co efficient k 2 terrain height and structure height factor. Several of the tooling and casting requirements of a part can be addressed at the design stage. Either way i think you should investigate the lateral load paths in this house. Where v z design wind speed at any height z in m s.

Design codes in general design codes are issued by a professional organization interested in insuring safety and standards. Different design methods are used but they typically defined the load cases or combination stress or strength limits and deflection limits. Design wind speed up to 10 m height from mean ground level shall be considered constant. K 3 topography factor.

Seismic importance factor i e and seismic use group. The design wind speed v z is given by v z v b k 1 k 2 k 3. Structural engineering general discussion.