Page 306 - 2018_IRC

WALL CONSTRUCTION

SURFACE OF CONCRETE OR SECTION FROM WHICH DEVELOPMENT LENGTH IS MEASURED DEVELOPMENT LENGTH PER TABLE R608.5.4(1)

A

SIDE COVER
FOR 90° AND
180° HOOK

COVER ON BAR A SECTION A-A
EXTENSION FOR 90° HOOK

For SI: 1 degree = 0.0175 rad.

FIGURE R608.5.4(2)
DEVELOPMENT LENGTH AND COVER FOR HOOKS AND BAR EXTENSION

90 DEG HOOK 90 DEG HOOK

d b
d b
EXTENSION
12 d b
b
DIAMETER
6 d BEND d b 4 d BEND EXTENSION
b
DIAMETER 12
135 DEG HOOK

180 DEG HOOK d b
4 d BEND
d b b
6 d BEND DIAMETER
b
EXTENSION
DIAMETER
6d b
1
2 / IN., BUT NOT
2
LESS THAN 4 d EXTENSION HOOKS FOR STIRRUPS IN LINTELS
b
HOOKS FOR REINFORCEMENT IN
WALLS AND FOUNDATIONS
For SI: 1 inch = 25.4 mm, 1 degree = 0.0175 rad.

FIGURE R608.5.4(3)
STANDARD HOOKS

2018 INTERNATIONAL RESIDENTIAL CODE ® 281
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