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

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516 Index
Flying deck forms:
advantages of, 451–454
description of, 451
patented flying forms, 460–463
versatility of, 456–460
Footings:
design of, 197–202
placing anchor bolts, 210
procedure for erection, 202–203
round footings, 208–210
sloped footings, 208
stepped footings, 207–208
Forces acting on vertical shores,
186
Form ties:
architectural concrete, 400–401
coil ties, 247–249
coil-loop anchors, 250–251
snap ties, 246–247
taper ties, 249–250
Formwork:
care of, 3
dimensional tolerances, 465–469
removal of, 15, 159–160
safety factors, 160–162
Formwork materials:
properties of lumber, 41–44
properties of Plyform, 60–62
Foundation footings:
anchor bolts, 210
design of form panels, 198–202
foundation walls, 197–202
grade beam forms, 204
procedure for erection, 202–204
round forms, 208–210
sloped footings, 208
stepped footings, 207–208
G
Grade beam forms, 204
H
Hardboard:
for architectural concrete,
399–400
minimum bending radii, 77
physical properties, 71
High-density overlaid Plyform, 60
Horizontal shear stress in beams,
98–100
Horizontal shores, 180–181,
375–376
I
Impact of structural design on
costs, 7–8
Insulating concrete forms, 281–282
L
Lag screws:
lateral resistance of, 79
withdrawal resistance of, 78
Lateral pressure of concrete:
on column forms, 31–34
on formwork, 22–23
on wall forms, 23–30
Lateral resistance:
of lag screws, 77–79
of nails, 75–77
Load-duration adjustment factor
for lumber, 46–49
Loads on structural members, 89
Lumber:
allowable stresses, 44–46
bending stability factor, 50–51
column stability factor, 51–52
dimension lumber, 41–42
flat-use factor, 52
load-duration factors, 46
moisture content factors, 46
moment of inertia, 42
neutral axis, 43
section modulus, 42
size adjustment factors, 49
symbols for cross section, 43
Lumber vs. timber members, 88–89
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M
Maximum spans for lumber, 64,
67–79
Metal molds, 408
Minimum formwork accessories
safety factors, 160
Minimum lateral force on slabs, 159
Minimum time for forms to
remain in place, 159–160
Modified method for shear stress
in beams, 100–104
Moisture adjustment factor for
lumber, 46–49
Molds for forms:
metal, 408
plastic, 408
wood, 405
Motor-driven concrete buggies,
190–193
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