Anchor: #i1019911

Section 6: Reinforcing Steel

Anchor: #i1019916

Table of Standard Reinforcing Steel Bars

On quantity tables, show the length to the nearest inch and the weight to the nearest pound.

Anchor: #i1012869Table 1-7: Standard Reinforcing Steel Specifications

English Designations

Nom Bar Dia

(Inches)

Weight

(Lbs per LF)

Area

(Sq Inches)

#3

0.375

3/8

0.376

0.110

#4

0.500

1/2

0.668

0.196

#5

0.625

5/8

1.043

0.307

#6

0.750

3/4

1.502

0.442

#7

0.875

7/8

2.044

0.601

#8

1.000

1

2.670

0.785

#9

1.128

1 1/8

3.400

1.000

#10

1.270

1 1/4

4.303

1.266

#11

1.410

1 3/8

5.313

1.563

#14

1.693

1 3/4

7.650

2.250

#18

2.257

2 1/4

13.600

4.000

1 1/4" Dia Smooth

1.250

1 1/4

4.172

1.227


Anchor: #i1019925

Bar Labels

For bar labels, use upper case letters according to the designations listed in Table 1-8 where possible. Letters not designated may be used as necessary.

Lowercase prefix letters may be used to identify bars in sub-components such as wings. Examples are wH, wV, wU, and wS or wP bars in wingwalls. Prefix letters should be used only where there is a definite improvement in clarity from flagging the steel in sub-components separately from other reinforcing steel.

See individual chapters for detail examples of the normal bar designations.

Anchor: #i1012951Table 1-8: Preferred Bar Labels

Label

Description

A

Main bars top and bottom or

Main bars top

B

Main bars bottom

(Slabs on stringers or caps)

C

 

D

Distribution bars or dowels

E

Cap pedestal bars

F

Footings

G

 

H

Horizontal bars

I

(do not use)

J

Shape

K

 

L

Shape

M

 

N

 

O

(do not use)

P

 

Q

(not preferred)

R

 

S

Stirrups

T

Temperature steel

U

Shape

V

Vertical bars

W

 

X

Slab dowels

Y

 

Z

Spiral bars


Anchor: #i1019944

English Development Length and Splices

Class B splice – 50 percent or less of the bars spliced at one location* (except conventional slab reinforcing) * Epoxy coated splice lengths by designing engineer (round up to even inch)

Anchor: #i1013036Table 1-9: Class B Splices

Size

A

Ld

B

1.3 Ld

C

1.3 (1.4) Ld

D

1.3 (1.4) 0.8 Ld

E

1.3 (0.8) Ld

Grade 40 fy=40,000 psi f 'c=3,600 psi (Class C Concrete)

#3

(6.00") 1' – 0"

1' – 0"

1' – 0"

1' – 0"

1' – 0"

#4

(8.00") 1' – 0"

1' – 0"

1' – 3"

1' – 0"

1' – 0"

#5

(10.00") 1' – 0"

1' – 1"

1' – 7"

1' – 3"

1' – 0"

#6

(12.00") 1' – 0"

1' – 4"

1' – 10"

1' – 6"

1' – 1"

#7

(16.03") 1' – 5"

1' – 9"

2' – 6"

2' – 0"

1' – 5"

#8

(20.93") 1' – 9"

2' – 4"

3' – 3"

2' – 7"

1' – 10"

#9

(26.67") 2' – 3"

2' –11"

4' – 1"

3' – 3"

2' – 4"

#10

(33.76") 2' – 10"

3' – 8"

5' – 2"

4' – 2"

3' – 0"

#11

(41.68") 3' – 6"

4' – 7"

6' – 4"

5' – 1"

3' – 8"

#14

(56.67") 4' – 9"

 

 

 

 

#18

(73.33") 6' – 2"

 

 

 

 

Grade 60 fy=60,000 psi f 'c=3,600 psi (Class C Concrete)

#3

(9.00") 1' – 0"

1' – 0"

1' – 5"

1' – 2"

1' – 0"

#4

(12.00") 1' – 0"

1' – 4"

1' – 10"

1' – 6"

1' – 1"

#5

(15.00") 1' – 3"

1' – 8"

2' – 4"

1' – 10"

1' – 4"

#6

(18.00") 1' – 6"

2' – 0"

2' – 9"

2' – 3"

1' – 7"

#7

(24.04") 2' – 1"

2' – 8"

3' – 8"

2' –11"

2' – 1"

#8

(31.40") 2' – 8"

3' – 5"

4' – 10"

3' – 10"

2' – 9"

#9

(40.00") 3' – 4"

4' – 4"

6' – 1"

4' – 11"

3' – 6"

#10

(50.64") 4' – 3"

5' – 6"

7' – 9"

6' – 2"

4' – 5"

#11

(62.52") 5' – 3"

6' – 10"

9' – 6"

7' – 8"

5' – 6"

#14

(85.00") 7' – 1"

 

 

 

 

#18

(110.00") 9' – 2"

 

 

 

 


Class B splice – 50 percent or less of the bars spliced at one location* (except conventional slab reinforcing) * Epoxy coated splice lengths by designing engineer (round up to even inch)

Anchor: #i1013215Table 1-10: Class B Information

Description

Code

Ld ~ basic development length

A

Bent cap and deep slab main reinforcing splices (deeper than 12")

  • 1.3 (1.4) Ld ~ top bars spaced less than 6" C-C
  • 1.3 (1.4) (0.8) Ld ~ top bars spaced 6" C-C or more
  • 1.3 Ld ~ bottom bars spaced less than 6" C-C
  • 1.3 (0.8) Ld ~ bottom bars spaced 6" C-C or more

 

C

D

B

E

Column vertical reinforcing splices

  • 1.3 Ld ~ bars spaced less than 6" C-C
  • 1.3 (0.8) Ld ~ bars spaced 6" C-C or more

 

B

E

Temperature reinforcing splices

  • Ld ~ regardless of spacing

 

A

Column to drill shaft or footing reinforcing lapped splices (See Class C Splices)

Conventional slab reinforcing splices (See concrete slab reinforcing splices)



Class C splice – more than 50 percent of the bars spliced at one location* (except conventional slab reinforcing) * Epoxy coated splice lengths by designing engineer (round up to even inch)

Anchor: #i1013243Table 1-11: Class C Splices

Size

A

Ld

B

1.7 Ld

C

1.7 (1.4) Ld

D

1.7 (1.4) 0.8 Ld

E

1.7 (0.8) Ld

Grade 40 fy=40,000 psi f 'c=3,600 psi (Class C Concrete)

#3

(6.00") 1' – 0"

1' – 0"

1' – 3"

1' – 0"

1' – 0"

#4

(8.00") 1' – 0"

1' – 2"

1' – 8"

1' – 4"

1' – 0"

#5

(10.00") 1' – 0"

1' – 5"

2' – 0"

1' – 8"

1' – 2"

#6

(12.00") 1' – 0"

1' – 9"

2' – 5"

1' – 11"

1' – 5"

#7

(16.03") 1' – 5"

2' – 4"

3' – 3"

2' – 7"

1' – 10"

#8

(20.93") 1' – 9"

3' – 0"

4' – 2"

3' – 4"

2' – 5"

#9

(26.67") 2' – 3"

3' –10"

5' – 4"

4' – 3"

3' – 1"

#10

(33.76") 2' – 10"

4' – 10"

6' – 9"

5' – 5"

3' – 10"

#11

(41.68") 3' – 6"

5' – 11"

8' – 4"

6' – 8"

4' – 9"

#14

(56.67") 4' – 9"

 

 

 

 

#18

(73.33") 6' – 2"

 

 

 

 

Grade 60 fy=60,000 psi f 'c=3,600 psi (Class C Concrete)

#3

(9.00") 1' – 0"

1' – 4"

1' – 10"

1' – 6"

1' – 1"

#4

(12.00") 1' – 0"

1' – 9"

2' – 5"

1' – 11"

1' – 5"

#5

(15.00") 1' – 3"

2' – 2"

3' – 0"

2' – 5"

1' – 9"

#6

(18.00") 1' – 6"

2' – 7"

3' – 7"

2' – 11"

2' – 1"

#7

(24.04") 2' – 1"

3' – 5"

4' – 10"

3' –10"

2' – 9"

#8

(31.40") 2' – 8"

4' – 6"

6' – 3"

5' – 0"

3' – 7"

#9

(40.00") 3' – 4"

5' – 8"

8' – 0"

6' – 5"

4' – 7"

#10

(50.64") 4' – 3"

7' – 3"

10' – 1"

8' – 1"

5' – 9"

#11

(62.52") 5' – 3"

8' – 11"

12' – 5"

10' – 0"

7' – 2"

#14

(85.00") 7' – 1"

 

 

 

 

#18

(110.00") 9' – 2"

 

 

 

 


Class C splice – more than 50 percent of the bars spliced at one location* (except conventional slab reinforcing) * Epoxy coated splice lengths by designing engineer (round up to even inch)

Anchor: #i1013422Table 1-12: Class C Information

Description

Code

Ld ~ basic development length

A

Bent cap and deep slab main reinforcing splices (deeper than 12")

  • 1.7 (1.4) Ld ~ top bars spaced less than 6" C-C
  • 1.7 (1.4) (0.8) Ld ~ top bars spaced 6" C-C or more
  • 1.7 Ld ~ bottom bars spaced less than 6" C-C
  • 1.7 (0.8) Ld ~ bottom bars spaced 6" C-C or more

 

C

D

B

E

Column vertical reinforcing splices

  • 1.7 Ld ~ bars spaced less than 6" C-C
  • 1.7 (0.8) Ld ~ bars spaced 6" C-C or more

 

B

E

Temperature reinforcing splices

  • Ld ~ regardless of spacing

 

A

Column to drill shaft or footing reinforcing lapped splices

  • 1.7 Ld ~ all bars regardless of spacing

 

B

Conventional slab reinforcing splices (See concrete slab reinforcing splices)



Anchor: #i1019965

Concrete Slab Reinforcing Lapped Splices

Class C Splice – more than 50 percent of the bars spliced at one location

Anchor: #i1013447Table 1-13: Slab Reinforcing Splices

Size

A

1.7 (0.8) Ld

B

1.7 (0.8) 1.5 Ld

C

1.7 Ld

D

1.7 (1.5) Ld

Grade 60 fy=60,000 psi f 'c=4,000 psi (Class S Concrete)

#4

1' – 5"

2' – 1"

1' – 9"

2' – 7"

#5

1' – 9"

2' – 7"

2' – 2"

3' – 3"

#6

2' – 1"

3' – 1"

2' – 7"

3' – 10"

Note that values in splice table are rounded up to next inch



Anchor: #i1013487Table 1-14: Slab Splice Information

Description

Code

Slab reinforcing for designs based on bars spaced at 6" or more *

  • 1.7 (0.8) Ld ~ slab splices for reinforcing spaced at 6" C-C or more
  • 1.7 (0.8) 1.5 Ld ~ slab splices for reinforcing spaced 6" C-C or more (epoxy coated)

 

A

B

Slab reinforcing for designs based on bars spaced at less that 6" C-C

  • 1.7 Ld ~ slab splices for reinforcing spaced less than 6" C-C
  • 1.7 (1.5) Ld ~ slab splices for reinforcing spaced less than 6" C-C (epoxy coated)

 

C

D

* Conventional 8" slab used by the Bridge Division



Anchor: #i1019974

English Standard Bends – 90º Anchorage Hook

Main bars or secondary bars without another bar enclosed (Grades 40 and 60)

Standard Bends – 90º Anchorage Hook. . (click in image to see full-size image) Anchor: #i1004767

Figure 1-12. Standard Bends – 90º Anchorage Hook. .

Online users can click 1-12 to view this illustration in PDF

Anchor: #i1013503Table 1-15: 90º Anchorage Hook Information

Size

d

Bar Diameter

D

Pin Diameter

R

(D + d) / 2

rounded up

to next 0.25 inch

J

12d + R

rounded up

to next inch

#3

0.375"

2.250"

1 1/2"

6"

#4

0.500"

3.000"

1 3/4"

8"

#5

0.625"

3.750"

2 1/4"

10"

#6

0.750"

4.500"

2 3/4"

1' – 0"

#7

0.875"

5.250"

3 1/4"

1' – 2"

#8

1.000"

6.000"

3 1/2"

1' – 4"

#9

1.128"

9.024"

5 1/4"

1' – 7"

#10

1.270"

10.160"

5 3/4"

1' – 9"

#11

1.410"

11.280"

6 1/2"

2' – 0"

#14

1.693"

16.930"

9 1/2"

2' – 6"

#18

2.257"

22.570"

1' – 0 1/2"

3' – 4"


Anchor: #i1019988

English Standard Bends – 180º Anchorage Hook

Main bars or secondary bars without another bar enclosed (Grades 40 and 60)

Standard Bends – 180º Anchorage Hook. (click in image to see full-size image) Anchor: #i1005172

Figure 1-13. Standard Bends – 180º Anchorage Hook.

Online users can click 1-13 to view this illustration in PDF.

Anchor: #i1013579Table 1-16: 180º Anchorage Hook Information

Size

d

Bar Diameter

D

Pin Diameter

J 2 R rounded up to next 0.25 inch

H

E + R

rounded up

to next inch

G

(p R) + H – J

rounded up

to next 0.25 inch

#3

0.375"

2.250"

2 3/4"

4"

5 3/4"

#4

0.500"

3.000"

3 1/2"

5"

7"

#5

0.625"

3.750"

4 1/2"

5"

7 3/4"

#6

0.750"

4.500"

5 1/4"

6"

9"

#7

0.875"

5.250"

6 1/4"

7"

10 3/4"

#8

1.000"

6.000"

7"

8"

1' – 0"

#9

1.128"

9.024"

10 1/4"

10"

1' – 4"

#10

1.270"

10.160"

11 1/2"

11"

1' – 5 1/2"

#11

1.410"

11.280"

1' – 0 3/4"

1' – 1"

1' – 8 1/2"

#14

1.693"

16.930"

1' – 6 3/4"

1' – 5"

2' – 3 3/4"

#18

2.257"

22.570"

2' – 1"

1' – 10"

3' – 0 1/2"


Anchor: #i1020002

English Standard Bends – Stirrup and Tie Bars

Enclosing another bar within the bend (Grades 40 and 60)

Standard Bends – Stirrup and Tie Bars. . (click in image to see full-size image) Anchor: #i1005627

Figure 1-14. Standard Bends – Stirrup and Tie Bars. .

Online users can click 1-14 to view this illustration in PDF

Anchor: #i1013667Table 1-17: Stirrup and Tie Bar Information

Size

D

Bar Diameter

D

Pin Diameter

J1

E1 + R

rounded up

to next inch

J2

2R

rounded up

to next 0.25 inch

H

E2 + R

rounded up to next inch

G

(p R) + H – J2

rounded up

to next inch

#3

0.375"

1.500"

4"

2"

4"

5 1/4"

#4

0.500"

2.000"

5"

2 1/2"

4"

5 1/2"

#5

0.625"

2.500"

6"

3 1/4"

5"

7"

#6

0.750"

4.500"

1' – 0"

5 1/4"

6"

9"

#7

0.875"

5.250"

1' – 2"

6 1/4"

7"

10 3/4"

#8

1.000"

6.000"

1' – 4"

7"

8"

1' – 0"


Anchor: #i1020016

Cover Requirements

The minimum clear cover from the face of concrete to the face of the bar shall be as shown in Table 1-18. The usual centerline cover as given may require adjustment if a bar larger than normal is used. Exposure to sea water, sea spray, or road salt may also be cause for increasing these values. See individual chapters for normal or recommended bar sizes for each type of structure.

Anchor: #i1013727Table 1-18: Cover Requirements

 

Cover

Location in Structure

Min Clear

Usual Centerline *

End Clear

Slabs

  • Longitudinal bars
  • Transverse bars
  • Top bars
  • Bottom bars

 

 

 

2

1 1/4"

 

 

 

 

 

 

2"

1 1/2"

 

 

Beams (except prestressed)

  • Main steel
  • Ties and stirrups

 

 

2"

 

 

2 1/4"

 

2

 

Abutment

  • Main steel
  • Stirrups top and sides
  • Stirrups bottom

 

 

2"

3"

 

 

2 1/4"

3 1/4"

 

6"

 

 

Interior bents

  • Main steel
  • Stirrups

 

 

2

 

 

2 1/4"

 

2

 

Walls

  • Unformed face (cast against earth)
  • Formed face (including backfilled)

 

3

2

 

3 1/2"

2 1/4"

 

3

2

Columns and drilled shafts

  • Stirrups and spirals

 

2 3/4"

 

3"

 

 

Footings

  • Top
  • Sides
  • Bottom

 

2"

3"

3"

 

2 1/4"

4"

3 3/4"

 

2"

2"

2"

Delicate castings (rails, etc.)

1 1/2"

1 3/4"

1 1/2"

Bearing seat pedestals

2"

2 1/4"

1 1/2"

* Reference TxDOT Standards Specification Manual, Item 440.8:

2 1/4" and 3 1/4" centerline dimensions for #4 and #5 bars.

2 1/2" and 3 1/2" centerline dimensions for #6 and #7 bars.


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