Answered: 12 ft. 16 ft. 20 ft.

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

Chapter6: Sketching Applications

Section: Chapter Questions

Problem 6.18Q

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Question

Design the deep beam in a wall for a warehouse, as shown in the drawing below using the strength design method of TMS 402-22. The wall is to be constructed of fully grouted hollow concrete masonry units in running bond. Determine the width of the masonry units, and the flexural and shear reinforcement required. Use mf ′ = 2,000 psi and Grade 60 (60 ksi) steel, and Type S Portland cement mortar. In addition to its own weight, it carries a dead load of 1.5 kip/ft. and a live load of 0.2 kip/ft. from the roof. The walls on both sides of the opening are very long. Therefore, you may assume that the beam is fixed from rotation at both ends. Design using the following two methods. (a) Design it as a deep beam with the moment arm z given by the code. Show the layout of the flexural and shear reinforcements with diagrams. (b) Design a masonry lintel beam (not a deep beam) that will carry the weight of the masonry of above, and the dead and live loads from the roof. Determine whether you can count on the arch action assuming there is sufficient wall on each side. You first need to select the depth of the lintel beam. Show the layout of the flexural and shear reinforcements in the lintel beam with diagrams. (c) Compare the designs from part (a) and part (b), and comment on the differences.