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

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Contents
xi
Physical Properties and Allowable Stresses for
Lumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Physical Properties and Allowable Stresses for
Plyform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Table of Equations for Calculating Allowable
Span Lengths for Wood Beams and
Plywood Sheathing . . . . . . . . . . . . . . . . . . . . . . . . . 215
Design of Forms for a Concrete Wall . . . . . . . . . . . . . 220
Lateral Pressure of Concrete on Forms . . . . . 222
Plyform Sheathing to Resist Pressure
from Concrete . . . . . . . . . . . . . . . . . . . . . . . . 222
Summary of Allowable Span Lengths for the
Sheathing . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Studs for Support of Plyform . . . . . . . . . . . . . 225
Bearing Strength between Studs and Wale . . . . 226
Size of Wale Based on Selected 24 in.
Spacing of Studs . . . . . . . . . . . . . . . . . . . . . . 227
Strength Required of Ties . . . . . . . . . . . . . . . . 229
Results of the Design of the Forms for the
Concrete Wall . . . . . . . . . . . . . . . . . . . . . . . . 229
Tables to Design Wall Forms . . . . . . . . . . . . . . . . . . . . 230
Calculating the Allowable Concrete Pressure on
Plyform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Allowable Pressure Based on Fiber Stress in
Bending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Allowable Pressure Based on Bending Deflection . . . . 234
Allowable Pressure Based on Shear Stress . . . . . . . . 235
Allowable Pressure Based on Shear Deflection . . . . 235
Maximum Spans for Lumber Framing Used to
Support Plywood . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Using Tables to Design Forms . . . . . . . . . . . . . . . . . . 240
Forms for Walls with Batters . . . . . . . . . . . . . . . . . . . . 240
Forms for Walls with Offsets . . . . . . . . . . . . . . . . . . . 241
Forms for Walls with Corbels . . . . . . . . . . . . . . . . . . . 242
Forms for Walls with Pilasters and Wall Corners . . . . 243
Forms for Walls with Counterforts . . . . . . . . . . . . . . 243
Forms for Walls of Circular Tanks . . . . . . . . . . . . . . . 244
Form Ties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Snap Ties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Coil Ties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Taper Ties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Coil Loop Inserts for Bolt Anchors . . . . . . . . . . . . . . 250
Prefabricated Wood Form Panels . . . . . . . . . . . . . . . . 251
Commercial, or Proprietary, Form Panels . . . . . . . . . 253
Gates Single-Waler Cam-Lock System . . . . . . . . . . . 253
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