291 322
291
MASONS SUPPLY COMPANY
Oregon (800) 537-3407 ♦ Washington (800) 537-6216
Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Wilsonville | Ridgefield | Seattle | Tacoma | Woodinville
M A S C O . N E T
GENERAL & TECH INFO
CHARTS
Rate of
placement
R, ft per hr
Concrete temperature during placement, degrees F
90
o
F
80
o
F
70
o
F
60
o
F
50
o
F
40
o
F
1
250
263
279
300
330
375
2
350
375
407
450
510
600
3
450
488
536
600
690
825
4
550
600
664
750
870
1050
5
650
713
793
900
1050
1275
6
750
825
921
1050
1230
1500
7
850
938
1050
1200
1410
1725
8
950
1050
1179
1350
1590
1950
9
1050
1163
1307
1500
1770
2175
10
1150
1275
1436
1650
1950
2400
11
1250
1388
1564
1800
2130
2625
12
1350
1500
1693
1950
2310
2850
13
1450
1613
1821
2100
2490
14
1550
1725
1950
2250
2670
16
1750
1950
2207
2550
18
1950
2175
2464
2850
20
2150
2400
2721
22
2350
2625
2979
24
2550
2850
26
2750
28
2950
Base values of lateral pressure on column forms, * psf, for various pour rates and
concrete temperatures.
Multiply value from this table by unit weight and chemistry coefficients to obtain pressure
for design of column forms.
* Base value of lateral pressure equals 150 + 9000 R/T
NOTE: Depending on coefficient values, the minimum pressure of 600 C
w
may govern. Do not use
pressures in excess of
wh.
BASE VALUES OF LATERAL PRESSURE ON WALL FORMS
Multiply value by unit weight & chemistry coefficients to obtain pressure on wall form
Table based on: Cc= 1.0 Cw= 1.0
RATE OF PLACEMENT
p, maximum lateral pressure, psf, for temperature indicated
90 F
80 F
70 F
60 F
50 F
40 F
1
663
250 728 263 810 279 920 300 1074 330 1305 375
2
694
350 763 375 850 407 967 450 1130 510 1375 600
3
726
450 798 488 890 536 1013 600 1186 690 1445 825
4
757
550 833 600 930 664 1060 750 1242 870 1515 1050
5
788
650 868 713 970 793 1107 900 1298 1050 1585 1275
6
819
750 903 825 1010 921 1153 1050 1354 1230 1655 1500
7
850
938
1050
1200
1410
1725
8
881
973
1090
1247
1466
1795
9
912
1008
1130
1293
1522
1865
10
943
1043
1170
1340
1578
1935
11
974
1078
1210
1387
1634
2005
12
1006
1113
1250
1433
1690
2075
13
1037
1148
1290
1480
1746
2145
14
1068
1183
1330
1527
1802
2215
15
1099
1218
1370
1573
1858
2285
16
1130
1253
1410
1620
1914
2355
17
1161
1288
1450
1667
1970
2425
P=CwCc[150+43, 400/T+2800 R/T] applies where placement height is greater than 14'.
P=CwCc [150+9000R/T] (shaded) applies for R less than 7 FT/HR.
ACI 347-04 (Walls)
ACI 347-04 (Columns)
ACI 347-04
Unit weight coefficient: C
w
Less than 140 pcf:
C
w
=0.5[1+(w/145 pcf)]
(but not less than 0.80)
140 to 150 pcf:
C
w
=1.0
More than 150 pcf:
C
w
=w/145 pcf
Chemistry coefficient C
c
Type I, II and III, w/o
retarders:
C
c
=1.0
Type I, II and III w/ retarders:
C
c
=1.2
Other types containing less
than 70% slag or 40% fly ash,
w/o retarders:
C
c
=1.2
Other types containing less
than 70% slag or 40% fly ash
w/ retarders:
C
c
=1.4
Blends containing more than
70% slag or 40% fly
ash:
C
c
=1.4