METAL BUILDING DESIGN CONSIDERATIONS & REQUIREMENTS

This article is about Metal Building Design Considerations & Technical Requirements.

Metal Building design shall be according to the MBMA Metal Building Systems Manual.
Rigid frames shall consist of tapered or uniform-depth solid web rafters rigidly connected to tapered or uniform-depth solid web columns. The basis for frame analysis shall be hinged at the column base. The frame shall provide a clear span capable of supporting bridge cranes and/or monorails with hoists as indicated on the drawings.
End wall framing members shall consist of post and beam end frames and/or fully or partially loaded rigid frames. Buildings shall not be designed for future expansion unless indicated on the drawings.
The roof purlin system shall provide continuity over the interior rigid frame rafters.
Roof slope for all buildings shall be a 1 inch in 12 inches (“) unless specified otherwise on the contract drawings.
The wall girt system shall be either flush or recess-mounted and shall be framed into the rigid frame and/or columns. The type of girt system is indicated on the Company drawings.
Bracing of the structure shall be by means of diagonal bracing and/or portal columns and/or portal frames. Permissible braced bays are indicated on the Company drawings.
Door, window, and other framed openings shall be designed to replace, structurally, the sidewall panels and/or the framing they displace.
Buildings shall be designed for bearing directly on foundations without the use of grout beds.
Foundation out-of-level tolerances as provided by Company will be 1/8 inch in 20 ft overall. Structural steel, such as building frames and bracing steel, shall be designed according to the AISC Manual of Steel Construction.
Cold-formed sections, such as roof purlins and girt framing steel, shall be designed according to the AISI Cold Formed Steel Manual.
Welding design shall be according to the AWS Code for Welding in Building Construction.