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REINFORCING BAR SPACING





Clear Spacing for flexure members - one bar diameter but not less than 1"

Spirally reinforced and tied compression members - 1 1/2 bar diameters but not less than 1 1/2"

Pretensioning Steel - 4 diameters

For Bundled bars, the diameter of a single bar of equivalent diameter shall be used

Clear distance for all configurations shall also be greater than 4/3 of the maximum aggregate size

Maximum Average Tensile Reinforcing Spacing in Slabs Note: Spacing for slabs shall not exceed 18" or 3 X Slab thickness

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Outside
2"
#4
4 1/2"
60
Outside
2"
#5
4 1/4"
60
Outside
2"
#6
4"
60
Outside
2"
#7
3 3/4"
60
Outside
2"
#8
3 1/2"
60
Outside
2"
#9
3 1/2"
60
Outside
2"
#10
3 1/4"
60
Outside
2"
#11
3"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Outside
1 1/2"
#4
7 1/2"
60
Outside
1 1/2"
#5
6 3/4"
60
Outside
1 1/2"
#6
6 1/2"
60
Outside
1 1/2"
#7
6"
60
Outside
1 1/2"
#8
5 3/4"
60
Outside
1 1/2"
#9
5 1/4"
60
Outside
1 1/2"
#10
5"
60
Outside
1 1/2"
#11
4 3/4"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Outside
1"
#4
14 1/2"
60
Outside
1"
#5
13 1/4"
60
Outside
1"
#6
12"
60
Outside
1"
#7
11"
60
Outside
1"
#8
10"
60
Outside
1"
#9
9 1/4"
60
Outside
1"
#10
8 1/2"
60
Outside
1"
#11
8"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Outside
3/4"
#4
NA"
60
Outside
3/4"
#5
NA"
60
Outside
3/4"
#6
NA"
60
Outside
3/4"
#7
16 1/4"
60
Outside
3/4"
#8
14 1/2"
60
Outside
3/4"
#9
13 1/4"
60
Outside
3/4"
#10
12"
60
Outside
3/4"
#11
11"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Inside
2"
#4
8"
60
Inside
2"
#5
7 1/2"
60
Inside
2"
#6
7"
60
Inside
2"
#7
6 3/4"
60
Inside
2"
#8
6 1/2"
60
Inside
2"
#9
6"
60
Inside
2"
#10
5 3/4"
60
Inside
2"
#11
5 1/2"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Inside
1 1/2"
#4
13 1/4"
60
Inside
1 1/2"
#5
12 1/4"
60
Inside
1 1/2"
#6
11 1/2"
60
Inside
1 1/2"
#7
10 3/4"
60
Inside
1 1/2"
#8
10"
60
Inside
1 1/2"
#9
9 1/2"
60
Inside
1 1/2"
#10
9"
60
Inside
1 1/2"
#11
8 1/2"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Inside
1"
#4
14 1/2"
60
Inside
1"
#5
13 1/4"
60
Inside
1"
#6
12"
60
Inside
1"
#7
11"
60
Inside
1"
#8
10"
60
Inside
1"
#9
9 1/4"
60
Inside
1"
#10
8 1/2"
60
Inside
1"
#11
8"

Maximum Average Tensile Reinforcing Spacing in Beams

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Outside
3"
#4
3"
60
Outside
3"
#5
3 1/4"
60
Outside
3"
#6
2 1/4"
60
Outside
3"
#7
2 3/4"
60
Outside
3"
#8
2 1/2"
60
Outside
3"
#9
2 1/2"
60
Outside
3"
#10
2 1/4"
60
Outside
3"
#11
NA

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Outside
2"
#4
6 1/4"
60
Outside
2"
#5
6"
60
Outside
2"
#6
5 3/4"
60
Outside
2"
#7
5 1/4"
60
Outside
2"
#8
5"
60
Outside
2"
#9
4 3/4"
60
Outside
2"
#10
4 1/2"
60
Outside
2"
#11
4 1/2"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Outside
1 1/2"
#4
10 1/2"
60
Outside
1 1/2"
#5
9 3/4"
60
Outside
1 1/2"
#6
9 1/4"
60
Outside
1 1/2"
#7
8 1/2"
60
Outside
1 1/2"
#8
8"
60
Outside
1 1/2"
#9
7 1/2"
60
Outside
1 1/2"
#10
7"
60
Outside
1 1/2"
#11
6 3/4"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Inside
3"
#4
5 1/4"
60
Inside
3"
#5
5"
60
Inside
3"
#6
5"
60
Inside
3"
#7
4 3/4"
60
Inside
3"
#8
4 1/2"
60
Inside
3"
#9
4 1/2"
60
Inside
3"
#10
4 1/4"
60
Inside
3"
#11
4"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Inside
2"
#4
11 1/4"
60
Inside
2"
#5
10 1/2"
60
Inside
2"
#6
10"
60
Inside
2"
#7
9 1/2"
60
Inside
2"
#8
9"
60
Inside
2"
#9
8 1/2"
60
Inside
2"
#10
8 1/4"
60
Inside
2"
#11
7 3/4"

Yield Strength
Exposure
Cover
Bar Size
Average Spacing
60
Inside
1 1/2"
#4
18 3/4"
60
Inside
1 1/2"
#5
17 142"
60
Inside
1 1/2"
#6
16"
60
Inside
1 1/2"
#7
15"
60
Inside
1 1/2"
#8
14 1/4"
60
Inside
1 1/2"
#9
13 1/2"
60
Inside
1 1/2"
#10
12 1/2"
60
Inside
1 1/2"
#11
12"



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