Construction Materials, Methods and Techniques (MindTap Course List)
4th Edition
ISBN: 9781305086272
Author: William P. Spence, Eva Kultermann
Publisher: Cengage Learning
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Chapter 4, Problem 2RQ
To determine
The activities required to prepare a construction site
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Commercial trucks begin to arrive at a seaport entry plaza at 7:50 A.M., at the rate of λ(t) = 6.3 – 0.25t[λ(t) is in veh/min and t is in minutes]. The plaza opens at 8:00 A.M. For the first 10 minutes, one processing booth is open. After the first 10 minutes until the queue clears, two processing booths are open. Each booth processes trucks at a uniform rate of two per minute. What is the average delay per vehicle, the maximum queue length, and the average queue length?
The floor system of a gymnasium consists of a 130-mm-thick concrete slab resting on
four steel beams (A = 9100 mm²) that, in turn, are supported by two steel girders (A =
25600 mm²), as shown in Fig. 2.3. Determine the dead loads acting on beam BF and
girder AD.
2.3 Beam BF
Uniformly distributed load
ㅋㅋ
=28.6 (5) (180) + 77 (100) = 16.04 kN/m
16.04 kN/m
B
80.2 kN
F
80.2 kN.
Trucks begin to arrive at a truck weigh station (with a single scale) at 6:00 A.M. at a deterministic but time-varying rate of λ(t) = 4.3 − 0.22t [λ(t) is in veh/min and t is in minutes]. The departure rate is a constant 2 veh/min (time to weigh a truck is 30 seconds). When will the queue that forms be cleared, what will be the total delay, and what will be the maximum queue length?
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Construction Materials, Methods and Techniques (MindTap Course List)
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