Module 3 – Gerber Roof Girders
Design Module 3 covers the design of roof girders in Gerber construction. Design tables are provided to assist designers in selecting the cantilever girder and drop-in segment sizes for typical building applications with evenly spaced columns and joists. The tables are applicable to flat roofs subject to dead, live, snow and vertical wind loads. Various girder and joist span combinations, lateral bracing configurations and load conditions are included. Solved examples are presented to illustrate practical applications.
CISC Design Modules – DM3
Description
Design Module 3 (DM3) covers the design of roof girders in cantilever-suspended-span construction, the dominant form of Gerber girder application. Design tables are provided to assist designers in selecting the cantilever girder and drop-in segment sizes for typical building applications with evenly spaced columns and joists.
The tables are applicable to flat roofs subject to dead, live, snow and vertical wind loads, and are based on climatic parameters representing many Canadian locations. Various girder and joist span combinations, lateral bracing configurations and load conditions are included. Solved examples are presented to illustrate practical applications.
DM3 is intended to be used in conjunction with the National Building Code of Canada (2015) and CSA Standard S16-14, Design of Steel Structures. It applies to wide-flange (W-shape) beams produced to ASTM A992/A992M and A572/A572M Grade 50[345].
