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What is the design live load for the roof with slope of 1(vertical):2(horizontal) and At of 500 square feet? (Group 2)

Architectural Drafting and Design (MindTap Course List)

7th Edition

ISBN:9781285165738

Author:Alan Jefferis, David A. Madsen, David P. Madsen

Publisher:Alan Jefferis, David A. Madsen, David P. Madsen

Chapter29: Design Criteria For Structural Loading

Section: Chapter Questions

Problem 29.2Q

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Concept explainers

Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.

Question

2) What is the design live load for the roof with
slope of 1(vertical):2(horizontal) and At of 500
square feet? (Group 2)

Expert Solution

Step 1

Solution

we have given

slope of the roof = 1 (vertical) : 2(horizontal)

tributary area of the roof = A_t = 500 ft²

For Calculating design live , we have

$L_{r} = L_{o} \times R_{1} \times R_{2} H e r e, L_{o} = m i n i m u m r o o f l o a d = 20 p s f R_{1} & R_{2} a r e r e d u c t i o n f a c t o r s$

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