Page 255 - ICC IEBC 2018

RESOURCE A

FIGURE 2.1.7
REINFORCED CONCRETE COLUMNS
MINIMUM DIMENSION 20″ TO LESS THAN 22″
NUMBER OF
ASSEMBLIES

10

The number in each box is
keyed to the last number in the
Item Code column in the Table.
For example:
C-20-RC-6
5

2 11 6

1 3 10 9 7 8 5 4
0
0 1 2 3 4 5 6 7 8 9 10 11 12
FIRE RESISTANCE RATING (HOURS)

TABLE 2.1.7
REINFORCED CONCRETE COLUMNS
MINIMUM DIMENSION 20″ TO LESS THAN 22″
ITEM MINIMUM PERFORMANCE REFERENCE NUMBER REC.
CODE DIMENSION CONSTRUCTION DETAILS LOAD TIME PRE-BMS-92 BMS-92 POST-BMS-92 NOTES HOURS
20″ square columns; gravel aggregate con-
C-20-RC-1 20″ crete (6690 psi); Reinforcement: vertical, four 367 2 hrs. 7 1, 2, 3 2
1 / ″ rebars; horizontal, tons
3
4
3 3
/ ″ wire at 6″ pitch; Cover 1 / ″.
4
8
20″ square columns; gravel aggregate con-
C-20-RC-2 20″ crete (4330 psi); Reinforcement: vertical, four 327 2 hrs. 7 1, 2, 4 2
1 / ″ rebars; horizontal, tons
3
4
3 3
/ ″ ties at 6″ pitch; Cover 1 / ″.
4
8
20″ square columns; gravel aggregate con-
2 hrs.
199
3
1
C-20-RC-3 20 / ″ crete (4230 psi); Reinforcement: vertical, four tons 56 min. 7 5 2 / 4
1 / ″ rebars; horizontal,
4
1
3 8 1
/ ″ wire at 5″ pitch; Cover 1 / ″.
8 8
1
Reinforced concrete columns with 1 / ″ con-
2
crete outside of reinforcing steel; Gross
C-20-RC-4 20″ — 12 hrs. 1 6, 7 12
diameter or side of column: 20″ ; Group I,
Column A.
Description as per C-20-RC-4;
C-20-RC-5 20″ — 9 hrs. 1 6, 7 9
Group I, Column B.
(continued)
236 2018 INTERNATIONAL EXISTING BUILDING CODE ®
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