A cantilevered one-way slab spans 10 ft. In addition to its own weight, it supports an uniformly distributed service live load of 75 psf. A masonry wall, which has a service dead load of 1200 lb/ft, is also supported by the slab along with a service live load of 500 lb/ft loaded on the tip of the cantilevered slab. (a) (b) Select the depth of the slab using ACI Code's minimum thickness requirements where deflections are not computed. Design the primary steel and temperature steel and show your results in a sketch. The concrete is light-weight concrete and has a unit weight of 110 lb/ft'. Assume 3/4 inch cover on the reinforcement aand that f' = 3 ksi and f, = 60 ksi. Assume interior exposure and use ACI 318-19. Repeat part (a) NOT using the ACI Code's minimum thickness requirements for cases where deflections are not computed. Use p=0.18 f'/f,.

A cantilevered one-way slab spans 10 ft. In addition to its own weight, it supports an uniformly distributed service live load of 75 psf. A masonry wall, which has a service dead load of 1200 lb/ft, is also supported by the slab along with a service live load of 500 lb/ft loaded on the tip of the cantilevered slab. (a) (b) Select the depth of the slab using ACI Code's minimum thickness requirements where deflections are not computed. Design the primary steel and temperature steel and show your results in a sketch. The concrete is light-weight concrete and has a unit weight of 110 lb/ft'. Assume 3/4 inch cover on the reinforcement aand that f' = 3 ksi and f, = 60 ksi. Assume interior exposure and use ACI 318-19. Repeat part (a) NOT using the ACI Code's minimum thickness requirements for cases where deflections are not computed. Use p=0.18 f'/f,.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

A cantilevered one-way slab spans 10 ft. In addition to its own weight, it supports an
uniformly distributed service live load of 75 psf. A masonry wall, which has a service
dead load of 1200 lb/ft, is also supported by the slab along with a service live load of 500
lb/ft loaded on the tip of the cantilevered slab.
(a) Select the depth of the slab using ACI Code's minimum thickness requirements
where deflections are not computed. Design the primary steel and temperature
steel and show your results in a sketch. The concrete is light-weight concrete and
has a unit weight of 110 lb/ft³. Assume 3/4 inch cover on the reinforcement aand
that f' = 3 ksi and f. = 60 ksi. Assume interior exposure and use ACI 318-19.
(b)
Repeat part (a) NOT using the ACI Code's minimum thickness requirements for
cases where deflections are not computed. Use p = 0.18 f'/f, .
6 ft
Ww=1200 lb ft
4 ft
ft
WLL-500 lb ft

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Step 1: Introducing given data

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Step 2: Calculate depth

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Step 3: Calculate ultimate moment

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Step 4: Calculate reinforcement ratio

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Step 5: Reinforcement area table

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Step 6: Calculate area for main steel & temperature steel

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Step 7: Part b

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Step 8: Calculate area for main steel & temperature steel for part b

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