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The document provides guidelines for structural detailing of reinforced concrete including dimensions and calculations for standard bend shapes in different bar sizes at various bend angles. Tables show plan dimensions, radii, and deducts for common bar sizes bent at angles from 30 to 150 degrees. An example calculation for the length of a standard #7 bar stirrup with two 90 degree bends is also shown.

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0% found this document useful (0 votes)
30 views1 page

Page 2

The document provides guidelines for structural detailing of reinforced concrete including dimensions and calculations for standard bend shapes in different bar sizes at various bend angles. Tables show plan dimensions, radii, and deducts for common bar sizes bent at angles from 30 to 150 degrees. An example calculation for the length of a standard #7 bar stirrup with two 90 degree bends is also shown.

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© © All Rights Reserved
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751.

5 Structural Detailing Guidelines - Engineerlng_Policy_Guide

P Ian Dim. Plan Dim. PI an Oiniens ion


M R M
1 C = jnr
d d d
T l I
V
R ' cc� i
0
D

0.

30 ° - 45 ° - 60 ° goo 120 ° - 135 ° - 150 °


BendAngle V = 30° BendAngle V • 45° � BendAngle V= 60°
Bar Size d D r
M C Deduct M C Deduct M C Deduct
#4 0.500" 3.00" 1.150" 2.000· o.536" o.916" 0.155" o.828" 1.374" o.282" 1.155• 1.833" o.4n"

#6 0.625" 3.75" 2.188" 2.500" 0.670" 1.145" 0.194" 1.036" 1.718" 0.353" 1.443" 2.291" 0.596"

#6 0.750" 4.50" 2.625" 3.000" 0.804" 1.374" 0.233" 1.243" 2.062" 0.424" 1.732" 2.749" 0.715"
#7 0.875" 5.25" 3.063" 3.500" 0.938" 1.604" 0.272" 1.450• 2.405" 0.494" 2.021· 3.207" 0.834"

#7g• 0.875" 7.00" 3.938" 4.375" 1.172" 2.062" 0.283" 1.812" 3.093" 0.532" 2.526" 4.123" 0.928"

#8 1.000· 6.00" 3.500" 4.000" 1.072" 1.833" 0.311" 1.657" 2.749" 0.565" 2.309" 3.665" 0.954"

#8g 8 1.000" 8.00" 4.500" 5.000" 1.340" 2.356" 0.323" 2.071" 3.534" 0.608" 2.887" 4.712" 1.061"

#9 1.128" 9.50" 5.314" 5.878" 1.575" 2.782" 0.368" 2.435" 4.174" 0.696" 3.394" 5.565" 1.223"
#10 1.270" 10.75" 6.010" 6.645" 1.781" 3.147" 0.414" 2.752" 4.720" 0.785" 3.836" 6.294" 1.379"

#11 1.410" 12.00" 6.705" 7.410" 1.986" 3.511" 0.460" 3.069" 5.266" 0.873" 4.278" 7.021" 1.535"

#14 1.693" 18.25" 9.972" 10.818" 2.899" 5.221" 0.576" 4.481" 7.832" 1.130" 6246" 10.442" 2.049"
#18 2.257" 24.00" 13.129" 14.257" 3.820" 6.874" 0.766" 5.905" 10.311" 1.500" 8.231" 13.748" 2.714"

BendAn V=9o•,::::;, BendAngle V • 120° BendAngle V = 135° BendAngle V = 150°


Bar Size
___,,
M C Deduct M C Deduct M C Deduct M C Deduct

#4 2.000· 2_749•/ 1.251" /f 3.464" 3.665" 3.263" 4.828" 4.123" 5.534" 7.464" 4.581" 10.347"

#6 2.500" 3.436" 1.564" 4.330" 4.581" 4.079" 6.036" 5.154" 6.917" 9.330" 5.727" 12.933" I

#6 3.000" 4.123" 1.877" 5.196" 5.498" 4.895" 7.243" 6.185" 8.300" 11.196" 6.872" 15.520"
#7 3.500" 4.811" 2.189" 6.062" 6.414" 5.710" 8.450" 7.216" 9.684" 13.062" 8.018" 18.107"

#7ga
4.375" 6.185" 2.565" 7.578" 8.247" 6.909" 10.562" 9.278" 11.847" 16.328" 10.308" 22.347"

#8 4.000" 5.498" 2.502" 6.928" 7.330" 6.526" 9.657" 8.247" 11.067" 14.928" 9.163" 20.693"

#8g8 5.000" 7.069" 2.931" 8.660" 9.425" 7.896" 12.071" 10.603" 13.539" 18.660" 11.781" 25.540"

#9 5.878" 8.347" 3.409" 10.181" 11.130" 9.232" 14.191" 12.521" 15.861" 21.937" 13.912" 29.962"
#10 6.645" 9.440" 3.850" 11.509" 12.587" 10.432" 16.042" 14.161" 17.924" 24.799" 15.734" 33.865"

#11 7.410" 10.532" 4288" 12.834" 14.043" 11.626" 17.889" 15.798" 19.980" 27.654" 17.554" 37.755"

#14 10.818" 15.663" 5.973" 18.737" 20.884" 16.590" 26.117" 23.495" 28.739" 40.373" 26.105" 54.641"
#18 14.257" 20.622" 7.892" 24.694" 27.496" 21.891" 34.419" 30.933" 37.906" 53.208" 34.370" 72.045"

d= Bar djameter D = Finished bend diametw:


�{#4 thru #8 epoxv or uncoated bars) -
D = 8d, (#7 & #8 galvanized bars)
D = Values shown, (#9 thru #18)
.Deduct= 2M C I angles}
r' angles)
..!2fillvct= 2R {90" on()'.} c r--
.•M = R(Tan V/2} Ail M= R {90° only

• L.=,,.radius to centenme of bar= D/2 + d/2 R = radius to outer edge of ar = r + d/2

• #7g & #Bg represent galvanized bars.


#7 & #8 represent uncoated and epoxy bars.
All other sizes represent uncoated, epoxy and galvanized bars.

Example Length Calculations for a Standard Pin Bend Shape:

°
�olO' #7 standard shaJ!..e with two 90 bends:
st
180 Hook;;,
°
9¾" 1 table-.. #7 Bar
B= 2'-6" cc A
C= 2'-0"
D= -2.a:.. w
Nominal Length = 7'-2¾" = 7'-3" *
N
90 Bend Deducts = :..2�} 2nd table
°

Actual Length= 6'-10.372"= 6'-10" *


i2'-0"(C)
_._____
... ...,
* Rounded to nearest inch

751.5.9.2.7.2 Stirrup Pin Bend Shapes (All Grades)


✓I IV'\ f @-.,.. v"' . 5J
https://epg.modot.org/index.php/751.5_Structural_Detailing_Guidelines

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