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Standard Hook Details: in Accordance With ACI 318 Building Code

The document provides details on standard hook dimensions and recommendations for 180 and 90 degree hooks according to ACI 318 building code. It also includes information on nominal bar dimensions, recommended stirrup and tie hook dimensions, and steel grade properties.

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Eric Gardner
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19K views2 pages

Standard Hook Details: in Accordance With ACI 318 Building Code

The document provides details on standard hook dimensions and recommendations for 180 and 90 degree hooks according to ACI 318 building code. It also includes information on nominal bar dimensions, recommended stirrup and tie hook dimensions, and steel grade properties.

Uploaded by

Eric Gardner
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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STANDARD HOOK DETAILS

in accordance with ACI 318 Building Code


All grades of steel (minimum yield strengths)
D = Finished inside bend diameter ACI 318 min. bend diameter:
(includes springback) 6d for #3 through #8
d = Bar diameter 8d for #9, #10 and #11
10d for #14 and #18
Detailing Hook Detailing
Dimension A or G Dimension

J D D

A or G
d d
4d, 12d
2½" min.

RECOMMENDED END HOOK DIMENSIONS


180° HOOKS 90° HOOKS
BAR SIZE D
A or G J A or G
#3 2¼˝ 0´- 5˝ 0´- 3˝ 0´- 6˝
#4 3˝ 0´- 6˝ 0´- 4˝ 0´- 8˝
#5 3¾˝ 0´- 7˝ 0´- 5˝ 0´- 10˝
#6 4½˝ 0´- 8˝ 0´- 6˝ 1´- 0˝
#7 5¼˝ 0´- 10˝ 0´- 7˝ 1´- 2˝
#8 6˝ 0´- 11˝ 0´- 8˝ 1´- 4˝
#9 9½˝ 1´- 3˝ 0´- 11¾˝ 1´- 7˝
#10 10¾˝ 1´- 5˝ 1´- 1¼˝ 1´- 10˝
#11 12˝ 1´- 7˝ 1´- 2¾˝ 2´- 0˝
#14 18¼˝ 2´- 3˝ 1´- 9¾˝ 2´- 7˝
#18 24˝ 3´- 0˝ 2´- 4½˝ 3´- 5˝

BAR SIZE MINIMUM MINIMUM


STEEL TYPE GRADE
RANGE YIELD (ksi) TENSILE (ksi)
#3 - #6 40 40 60
#3 - #20 60 60 90
Carbon #3 - #20 75 75 100
A615
#3 - #20 80 80 105
#3 - #20 100 100 115
Low-Alloy #3 - #18 60 60 80
A706 #3 - #18 80 80 100
#3 - #18 60 60 90
Stainless
#3 - #18 75 75 100
#3 - #8 40 40 70
Rail & Axle #3 - #8 50 50 80
A996
#3 - #11 60 60 90
#3 - #18 100 100 150
Low-Carbon
#3 - #11 120 120 150

© 2015 Concrete Reinforcing Steel Institute Made in U.S.A. 30BCARDSTD–15


ASTM STANDARD
REINFORCING BARS
NOMINAL DIMENSIONS
BAR SIZE AREA WEIGHT DIAMETER
DESIGNATION (in.2 ) (lb/ft) (in.)
#3 0.11 0.376 0.375
#4 0.20 0.668 0.500
#5 0.31 1.043 0.625
#6 0.44 1.502 0.750
#7 0.60 2.044 0.875
#8 0.79 2.670 1.000
#9 1.00 3.400 1.128
#10 1.27 4.303 1.270
#11 1.56 5.313 1.410
#14 2.25 7.65 1.693
#18 4.00 13.60 2.257
#20 4.91 16.69 2.50

D = Finished inside bend diameter ACI 318 min. bend diameter:


(includes springback) 6d for #3 through #8
d = Bar diameter 8d for #9, #10 and #11
10d for #14 and #18
6d for #3, #4, #5
Hook
12d for #6, #7, #8 A or G 6d,
3"
Dimension A or G
Detailing Hook

D H min.
Dimension

Dimension
Detailing

Detailing

A or G
D H
d 6d
d
D D D
d

RECOMMENDED RECOMMENDED
STIRRUP/TIE HOOK SEISMIC STIRRUP/
DIMENSIONS TIE HOOK DIMENSIONS
BAR 90° 135° BAR 135° SEISMIC HOOK
D
SIZE A or G A or G H* SIZE D A or G H*
#3 1½˝ 0´- 4˝ 4˝ 2½˝ #3 1½˝ 4¼˝ 3˝
#4 2˝ 0´- 4½˝ 4½˝ 3˝ #4 2˝ 4½˝ 3˝
#5 2½˝ 0´- 6˝ 5½˝ 3¾˝ #5 2½˝ 5½˝ 3¾˝
#6 4½˝ 1´- 0˝ 8˝ 4½˝ #6 4½˝ 8˝ 4½˝
#7 5¼˝ 1´- 2˝ 9˝ 5¼˝ #7 5¼˝ 9˝ 5¼˝
#8 6˝ 1´- 4˝ 10½˝ 6˝ #8 6˝ 10½˝ 6˝
* H dimension is approximate

933 N. Plum Grove Road, Schaumburg, IL 60173 (847) 517-1200 www.crsi.org

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