4.5 Since the 1960's, thin-shell concrete roof structures have seldom been utilized in the UnitedStates and Canada primarily because:a. building codes often make it difficult to obtain approval for their useb. design fees are substantially greater than for more conventional structuresc. formwork can be prohibitively expensived. materials (concrete and steel) are too costly4.6 A one-way slab is used typically in which of the following types of buildings?a. Museumb. Parkingc. Libraryd. Warehouse4.7 The cross section of a conventionally reinforced concrete one-way slab is shown below. Using ACI Table 9.5(a), answerthe following questions:TI5-0CANTILEVER23-0END-BAYSPAN L3INTERIOR-BAYa. What is the minimum slab thickness at end bays (T2)?BM WIDTH20 (197)MemberSolid one-way slabsTABLE 9.5(a)- MINIMUM THICKNESS OFNONPRESTRESSED BEAMS OR ONE-WAY SLABSUNLESS DEFLECTIONS ARE CALCULATED23-0END-BAYMinimum thickness, hOne end Both endsSimplysupported continuous continuous CantileverMembers not supporting or attached to partitions or otherconstruction likely to be damaged by large deflectionsU/20(241/28//10Beams orribbed one-way slabsNotes:Values given shall be used directly for members with normalweight concreteand Grade 60 reinforcement. For other conditions, the values shall be modifiedas follows:a) For lightweight concrete having equilibrium density, we in the range of 90to 115 let, the values shall be multiplied by (1.65-0.005we) but not lessthan 1.09.b) Forf, other than 60,000 psi, the values shall be multiplied by (0.4+ f/100,000)U/16U/18.5U/21(18

As per the guidelines, I am answering the first question.4.5The use of thin-shell concrete roof…

4.5 Since the 1960's, thin-shell concrete roof structures have seldom been utilized in the United States and Canada primarily because: a. building codes often make it difficult to obtain approval for their use b. design fees are substantially greater than for more conventional structures c. formwork can be prohibitively expensive d. materials (concrete and steel) are too costly

4.5 Since the 1960's, thin-shell concrete roof structures have seldom been utilized in the United States and Canada primarily because: a. building codes often make it difficult to obtain approval for their use b. design fees are substantially greater than for more conventional structures c. formwork can be prohibitively expensive d. materials (concrete and steel) are too costly

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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