1) A long span open-web steel joist with a span of 70 feet is required to support a floor. The joists are spaced at 3.5 ft apart, the dead load is 15 lb/ft² (not including the self weight), the live load is 80 lb/ft² and the live load deflection is limited to L/360 (which is that used to determine the live load limit - in red/light - based on deflection in the SJI catalogue tables and those limits must be multiplied by 1.5 if L/240 is used). Using the LRFD table provided, select the most economical joist that can be used considering the self weight. The lighter values are the limiting unfactored live load. (Note: longer spans that can support the load can also be used.)

1) A long span open-web steel joist with a span of 70 feet is required to support a floor. The joists are spaced at 3.5 ft apart, the dead load is 15 lb/ft² (not including the self weight), the live load is 80 lb/ft² and the live load deflection is limited to L/360 (which is that used to determine the live load limit - in red/light - based on deflection in the SJI catalogue tables and those limits must be multiplied by 1.5 if L/240 is used). Using the LRFD table provided, select the most economical joist that can be used considering the self weight. The lighter values are the limiting unfactored live load. (Note: longer spans that can support the load can also be used.)

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter10: Statically Indeterminate Beams

Section: Chapter Questions

Problem 10.3.1P: A propped cantilever steel beam is constructed from a W12 × 35 section. The beam is loaded by its...

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