Answered: The City of Forty-Five (population…

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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Question

The City of Forty-Five (population 465,565) has requested your assistance in evaluating its solid waste collection system. Determine the mean time per collection stop plus the mean time to reach the next stop, the number of pickup locations per load, and the minimum number of trucks the city must own. The City of Forty-Five collection data are as follows:

Average truck capacity = 12.5 m³; Average observed compaction ratio = 2.87

Crew size = 2; Number of pickups = 1 /wk (no rear-of-house service)

Average number of cans per stop = 2.63/wk at 0.1136 m³/can

Average number of residents per stop = 5

Average uncompacted density = 105.76 kg/m³

Average transport time to disposal site including delays and dumping = 1.78 h/trip

Average number of trips to disposal site = 2/d; Rest breaks = 2 at 28.0 min

Average maintenance downtime = 37.0 min/d; Average workday = 8.00 h

Average percent of trucks out of service for major repairs = 15.0%

Number of workday per week = 5

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