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

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Plywood
Thickness, in.
¹ 5 ⁄32 1,385
(1,385)
½ 1,565
(1,565)
¹ 9 ⁄32 1,620
(1,620)
5
⁄8 1,770
(1,770)
23
⁄32 2,170
(2,170)
¾ 2,325
(2,325)
1 1 ⁄ 8 4,815
(4,815)
Support Spacing, in.
4 8 12 16 20 24
390
(390)
470
(470)
530
(530)
635
(635)
835
(835)
895
(895)
1,850
(1,850)
110
(150)
145
(195)
165
(225)
210
(280)
375
(400)
460
(490)
1,145
(1,145)
–
–
–
–
–
–
–
120
160
(215)
200
(270)
710
(725)
–
–
–
–
–
–
–
–
115
(125)
145
(155)
400
(400)
–
–
–
–
–
–
–
–
–
–
–
(100)
255
(255)
Notes:
1. Courtesy APA—The Engineered Wood Association, “Concrete Forming,” 2004.
2. Deflection limited to l/360th of the span, l/270th for values in parentheses.
3. Plywood continuous across two or more spans.
Recommended Maximum Pressure on Plyform Class I—Values in
Pounds per Square Foot with Face Grain Parallel to Supports
TABLE 4-14
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Plywood
Support Spacing, in.
Thickness, in. 4 8 12 16 20 24 32
¹ 5 ⁄32 3,560
(3,560)
890
(890)
360
(395)
155
(205)
115
115
–
–
–
–
½ 3,925
(3,925)
980
(980)
410
(435)
175
(235)
100
(135)
–
–
–
–
¹ 9 ⁄32 4,110
(4,110)
1,225
(1,225)
545
(545)
245
(305)
145
(190)
–
(100)
–
–
5
⁄8 4,305
(4,305)
1,310
(1,310)
580
(580)
270
(330)
160
(215)
–
100
–
–
23
⁄32 5,005
(5,005)
¾ 5,070
(5,070)
1 1 ⁄ 8 7,240
(7,240)
1,590
(1,590)
1,680
(1,680)
2,785
(2,785)
705
(705)
745
(745)
1,540
(1,540)
350
(400)
375
(420)
835
(865)
210
(275)
230
(290)
545
(600)
110
(150)
120
(160)
310
(385)
Notes:
1. Courtesy APA—The Engineered Wood Association, “Concrete Forming,” 2004.
2. Deflection limited to l/360th of the span, l/270th for values in parentheses.
3. Plywood continuous across two or more spans.
TABLE 4-15
–
–
–
–
145
(190)
Recommended Maximum Pressures on Structural I Plyform—Values
in Pounds per Square Foot with Face Grain Across Supports
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