Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

Downloaded From : www.EasyEngineering.net
x
Contents
Wood Post Shores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Patented Shores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Ellis Shores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Symons Shores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Site Preparation for Shoring . . . . . . . . . . . . . . . . . . . . 170
Selecting the Size and Spacing of Shores . . . . . . . . . 170
Tubular Steel Scaffolding Frames . . . . . . . . . . . . . . . . 174
Accessory Items for Tubular Scaffolding . . . . . . . . . 177
Steel Tower Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Safety Practices Using Tubular Scaffolding . . . . . . . 179
Horizontal Shores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Shoring Formwork for Multistory Structures . . . . . 182
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
ww.EasyEngineering.n
7 Failures of Formwork . . . . . . . . . . . . . . . . . . . . . . . . . 185
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Causes of Failures of Formwork . . . . . . . . . . . . . . . . 185
Forces Acting on Vertical Shores . . . . . . . . . . . . . . . . 186
Force Produced by Concrete Falling on a Deck . . . . 187
Example 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Motor-Driven Concrete Buggies . . . . . . . . . . . . . . . . 190
Impact Produced by Motor-Driven Concrete
Buggies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Design of Formwork to Withstand Dynamic
Forces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Examples of Failure of Formwork and Falsework . . . . 193
Prevention of Formwork Failures . . . . . . . . . . . . . . . 194
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
8 Forms for Footings . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Forms for Foundation Walls . . . . . . . . . . . . . . . . . . . . 197
Example 8-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Procedure for Erection of Forms for Footings . . . . . 202
Forms for Grade Beams . . . . . . . . . . . . . . . . . . . . . . . . 204
Forms for Concrete Footings . . . . . . . . . . . . . . . . . . . . 204
Additional Forms for Concrete Footings . . . . . . . . . 205
Forms for Stepped Footings . . . . . . . . . . . . . . . . . . . . 207
Forms for Sloped Footings . . . . . . . . . . . . . . . . . . . . . 208
Forms for Round Footings . . . . . . . . . . . . . . . . . . . . . 208
Placing Anchor Bolts in Concrete Foundations . . . . 210
9 Forms for Walls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Definition of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Designing Forms for Concrete Walls . . . . . . . . . . . . . 213
Downloaded From : www.EasyEngineering.net