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This spreadsheet is used for the design of cold formed sections (girt, purlin) following AISI -S100-07 Specification.The scope of calculation is for restrained profile by sheet (girt, purlin).

The calculation is used design provisions for Load and Resistance Factor Design (LRFD) and summarize of design process as follows:

– Select profile and properties

– Check condition of design method

– Check bending and buckling

– Check shear capacity (include maximum shear and local shear)

– Check combination force

– Check deflection

Please see detail calculation as link below:

Purlin_American