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

34 Chapter Three
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Rate of Lateral Pressure, lb per sq ft for the Temperature Indicated
Filling Forms,
ft per hr 40çF 50çF 60çF 70çF 80çF 90çF 100çF
1 600 600 600 600 600 600 600
2 600 600 600 600 600 600 600
3 825 690 600 600 600 600 600
4 1,050 870 750 664 600 600 600
5 1,275 1,050 900 793 713 650 600
6 1,500 1,230 1,050 921 825 750 690
7 1,725 1,410 1,200 1,050 938 850 780
8 1,950 1,590 1,350 1,179 1,050 950 870
9 2,175 1,770 1,500 1,308 1,163 1,050 960
10 2,400 1,950 1,650 1,436 1,275 1,150 1,050
11 2,625 2,130 1,800 1,565 1,388 1,250 1,140
12 2,850 2,310 1,950 1,693 1,500 1,350 1,230
13 3,075 2,490 2,100 1,822 1,613 1,450 1,320
14 3,300 2,670 2,250 1,950 1,725 1,550 1,410
15 3,525 2,850 2,400 2,079 1,838 1,650 1,500
16 3,750 3,030 2,550 2,207 1,950 1,750 1,590
17 3,975 3,210 2,700 2,336 2,062 1,850 1,680
18 4,200 3,390 2,850 2,464 2,175 1,950 1,770
19 4,425 3,570 3,000 2,592 2,288 2,050 1,860
20 4,650 3,750 3,150 2,721 2,400 2,150 1,950
21 4,875 3,930 3,300 2,850 2,513 2,250 2,040
22 5,100 4,110 3,450 2,979 2,730 2,350 2,130
23 5,325 4,290 3,600 3,107 3,525 2,450 2,220
24 5,550 4,470 3,750 3,236 2,850 2,550 2,310
25 5,775 4,650 3,900 3,364 2,963 2,650 2,400
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Notes:
1. Note, do not use a design pressure greater than wh.
2. Concrete placement with normal internal vibration to a depth of 4 ft or less.
3. Values based on concrete with C w
= 1 and C c
= 1.
4. Concrete without additives with a maximum slump of 7 in.
5. Minimum pressure is 600C w
lb per sq ft, but in no case greater than wh.
6. Reference ACI Committee 347 for additional information on concrete form pressures [1].
TABLE 3-5 Relation between Rate of Filling Column Forms, Lateral Pressure, and
Temperature, P m
= C w
C c
[150 + 9,000R/T ]
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