Activity List for a Reroofing ProjectActivity Description1 Mobilize2 Set up scaffolding3 Construct security barricades4 Strip off old roofing5 Repair damaged decking6 Repair damaged cant strip7 Replace sheet metal8 Install felt roofing9 Hot mop roof10 Inspect roofing11 Call for inspection12 Remove scaffolding13 Haul off roofing materials14 DemobilizeDuration DaysUsing the activity list provided above:Draw a precedence diagram12132111211221*Under Predecessors, the following notation is used:x/#: Activity x must finish # days before this activity can begin.xSS/#: The # of days after activity x starts that this activity can begin.xFF/#: This activity cannot finish until # days after x is completed.XSF/#: This activity must finish # days before x can start.Predecessors12 SS/12,34 SS/14,55 SS/16,78910 SF/3106,712 FF/1, 13 FF/1

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Activity List for a Reroofing Project Activity Description 1 Mobilize 2 Set up scaffolding 3 Construct security barricades 4 Strip off old roofing 5 Repair damaged decking 6 Repair damaged cant strip 7 Replace sheet metal 8 Install felt roofing Duration Days 1 2 1 3 2 1 1 1 Predecessors 1 2 SS/1 2,3 4 SS/1 4,5 5 SS/1 6,7

Activity List for a Reroofing Project Activity Description 1 Mobilize 2 Set up scaffolding 3 Construct security barricades 4 Strip off old roofing 5 Repair damaged decking 6 Repair damaged cant strip 7 Replace sheet metal 8 Install felt roofing Duration Days 1 2 1 3 2 1 1 1 Predecessors 1 2 SS/1 2,3 4 SS/1 4,5 5 SS/1 6,7

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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Concept explainers

Material Selection

A wide variety of engineering applications make use of different materials, depending upon their usage. The materials used in civil engineering vary in their properties such as strength, ductility, brittleness, and creep strength. Depending upon the application and external loading conditions, an engineer must make a wise decision for material selection. A wrong decision would fail in its functionality.

Question

Activity List for a Reroofing Project
Activity Description
1 Mobilize
2 Set up scaffolding
3 Construct security barricades
4 Strip off old roofing
5 Repair damaged decking
6 Repair damaged cant strip
7 Replace sheet metal
8 Install felt roofing
9 Hot mop roof
10 Inspect roofing
11 Call for inspection
12 Remove scaffolding
13 Haul off roofing materials
14 Demobilize
Duration Days
Using the activity list provided above:
Draw a precedence diagram
1
2
1
3
2
1
1
1
2
1
1
2
2
1
*Under Predecessors, the following notation is used:
x/#: Activity x must finish # days before this activity can begin.
xSS/#: The # of days after activity x starts that this activity can begin.
xFF/#: This activity cannot finish until # days after x is completed.
XSF/#: This activity must finish # days before x can start.
Predecessors
1
2 SS/1
2,3
4 SS/1
4,5
5 SS/1
6,7
8
9
10 SF/3
10
6,7
12 FF/1, 13 FF/1

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