509.01 Description
509.02 Materials
509.03 Care of Material
509.04 Method of Placing
509.05 Bending
509.06 Approval of Placing
509.07 Splicing
509.08 Supports
509.09 Epoxy Coated Reinforcing Steel
509.10 Method of Measurement
509.11 Basis of Payment
509.01 Description. This work consists of furnishing and placing supports, mechanical connectors, tie wires, and reinforcing steel of the quality, type, size, and quantity designated, including steel dowels.
509.02 Materials. Furnish materials conforming to:
Epoxy coated reinforcing steel................................ 709.00
Reinforcing steel,
.... deformed bars........................... 709.01, 709.03, 709.05
Spiral reinforcing steel............................. 709.01 or 709.08
Bar mats and wire fabric................ 709.09, 709.10, 709.12
Plastic supports...................................................... 709.15
For metal bar supports used at or near the surface of the concrete, furnish either galvanized steel, stainless steel, epoxy coated steel or plastic coated steel.
Provide sufficient additional reinforcing steel to replace reinforcing steel removed by the Department for sampling. Replace random samples in the structures with additional steel, spliced according to 509.07.
When providing reinforcing steel for spiral cages, galvanized steel conforming to ASTM A767, Class 1, may be provided only for the spiral reinforcing steel in lieu of epoxy coated reinforcing steel. The galvanized coated reinforcing steel will meet all other requirements of 509. Where a sample splice is needed use the lap length requirements for epoxy coated. The Galvanized coating will be applied after the reinforcing has been fabricated. If the galvanized surface becomes damaged during handling in the field, repairs will conform to ASTM A780. Use bar supports and tie wires which are plastic coated or epoxy coated. Only suppliers certified under S1068 may provide this reinforcing.
509.03 Care of Material. Upon delivery to the project and before use, stack reinforcing steel off the ground and keep it free from dirt, oil, grease, or avoidable rust. Before placing in the concrete, ensure the reinforcing steel is clean and free of loose rust.
509.04 Method of Placing. Place reinforcing steel in the positions shown on the plans, and firmly secure the steel during the placing and setting of concrete. Tie bars in the superstructure at all intersections, except tie bars at alternate intersections where bar spacing is less than 1 foot (0.3 m) in any direction. The Contractor may place up to 25 percent of the upper longitudinal bars in a bridge deck slab beneath the upper transverse bars to support the top mat. Do not drive or force reinforcing steel into concrete after its initially set.
Welding on reinforcing is prohibited, except as permitted by 709.10 and 709.12. The Engineer will allow the Contractor to fabricate reinforcing bar cages for prestressed beams if fabrication is done in a manner satisfactory to the Director.
Install reinforcing steel with at least the following clearances from the concrete surface:
A. 2 1/2 inches (65 mm) to the top of sidewalks.
B. 3 inches (75 mm) at the faces of footings placed against rock or earth.
C. 1 1/2 inches (38 mm) to the bottom of a cast-in-place deck slab.
D. 2 inches (50 mm) at all other surfaces.
E. 2 1/4 to 2 1/2 inches (60 to 65 mm) between the reinforcing steel and the top surfaces of cast-in-place concrete deck slabs.
509.05 Bending. Bend reinforcing steel to the dimensions shown on the plans and in Table 509.05-1 (509.05-1M). Reject reinforcing steel showing transverse cracks.
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Bar |
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Nominal Dimensions |
180° |
90° |
135° |
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|
Bar |
Diameter |
Area |
Weight |
D |
A |
D |
A |
D |
A |
|
Size |
in |
in2 |
lb/ft |
in |
in |
in |
in |
in |
in |
|
3 |
0.375 |
0.11 |
0.376 |
2 1/4 |
5 |
2 1/4 |
5 |
1 1/2 |
4 |
|
4 |
0.500 |
0.20 |
0.668 |
3 |
6 |
3 |
7 |
2 |
4 1/2 |
|
5 |
0.625 |
0.31 |
1.043 |
3 3/4 |
7 |
3 3/4 |
8 1/2 |
2 1/2 |
5 1/2 |
|
6 |
0.750 |
0.44 |
1.502 |
41/2 |
8 |
4 1/2 |
10 |
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|
7 |
0.875 |
0.60 |
2.044 |
5 1/4 |
10 |
5 1/4 |
12 |
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|
8 |
1.000 |
0.79 |
2.670 |
6 |
11 |
6 |
131/2 |
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9 |
1.128 |
1.00 |
3.400 |
9 1/2 |
15 |
9 1/2 |
15 1/2 |
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10 |
1.270 |
1.27 |
4.303 |
10 3/4 |
17 |
10 3/4 |
18 |
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11 |
1.410 |
1.56 |
5.313 |
12 |
19 |
12 |
20 |
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14 |
1.693 |
2.25 |
7.65 |
18 1/4 |
27 |
18 1/4 |
25 |
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18 |
2.257 |
4.00 |
13.60 |
24 |
36 |
24 |
33 |
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Tolerances: For diameter of bends, “D”, the tolerance may be plus or minus the diameter of the bar. Standard fabricating tolerances shall be in accordance with the CRSI Manual of Standard Practice. No weight allowances will be made for tolerances. |
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TAble 509.05-1M STANDARD BENDS
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Bar |
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Nominal Dimensions |
180° |
90° |
135° |
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|
Bar |
Diameter |
Area |
Weight |
D |
A |
D |
A |
D |
A |
|
Size |
mm |
mm2 |
kg/m |
mm |
mm |
mm |
mm |
mm |
mm |
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#10M |
9.5 |
71 |
0.560 |
60 |
130 |
60 |
130 |
40 |
105 |
|
#13M |
12.7 |
129 |
0.994 |
75 |
155 |
75 |
180 |
50 |
115 |
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#16M |
15.9 |
199 |
1.552 |
95 |
180 |
95 |
215 |
65 |
140 |
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#19M |
19.1 |
284 |
2.235 |
115 |
205 |
115 |
255 |
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#22M |
22.2 |
387 |
3.042 |
135 |
255 |
135 |
305 |
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#25M |
25.4 |
510 |
3.973 |
150 |
280 |
150 |
345 |
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#29M |
28.7 |
645 |
5.060 |
240 |
380 |
240 |
395 |
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#32M |
32.3 |
819 |
6.404 |
275 |
430 |
275 |
455 |
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#36M |
35.8 |
1006 |
7.907 |
305 |
485 |
305 |
510 |
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#43M |
43.0 |
1452 |
11.38 |
465 |
685 |
465 |
635 |
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Tolerances: For diameter of bends, “D”, the tolerance may be plus or minus the diameter of the bar. Standard fabricating tolerances shall be in accordance with the CRSI Manual of Standard Practice. No weight allowances will be made for tolerances. |
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509.06 Approval of Placing. Before placing concrete, obtain the Engineer’s approval of reinforcing steel in place.
509.07 Splicing. Splice reinforcement only as specified or determined by the Engineer. Splice spiral reinforcement by lapping 1 1/2 turns. Do not replace spiral reinforcement removed for a material sample if the sample is from the end of the spiral and less than or equal to 30 inches (0.8 m) long.
Splice Nos. 14 and 18 (Nos. 45M and 55M) bars with mechanical connectors that are capable of developing 125 percent of the yield strength of the connected bars.
Splice additional steel used to replace random samples as follows:
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Bar Size |
Lap Length (inches) |
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Uncoated |
Epoxy Coated |
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4 |
22 |
27 |
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5 |
29 |
35 |
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6 |
34 |
41 |
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7 |
43 |
52 |
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8 |
57 |
69 |
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9 |
72 |
87 |
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10 |
92 |
111 |
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11 |
113 |
137 |
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Bar Size |
Lap Length (mm) |
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|
Uncoated |
Epoxy Coated |
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|
13M |
560 |
690 |
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16M |
740 |
890 |
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19M |
870 |
1040 |
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22M |
1090 |
1320 |
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25M |
1450 |
1750 |
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29M |
1830 |
2210 |
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32M |
2340 |
2820 |
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36M |
2870 |
3480 |
509.08 Supports. Use precast mortar blocks, metal supports, or plastic supports of adequate strength, of the proper depth, and in sufficient number to support reinforcing steel. Space supports for reinforcing steel no more than 4 feet (1.2 m) apart transversely and longitudinally. Metal supports shall have a shape that is easily enveloped by the concrete.
Mortar blocks may only be used to support the lower matt of reinforcing steel in concrete that is cast directly against bedrock or soil.
509.09 Epoxy Coated Reinforcing Steel. Use plastic coated or epoxy coated bar supports and tie wires to protect the epoxy coating from physical damage, as specified in 709.00, during placement and to prevent electrical coupling between mats. Carefully handle and install bars to perform minimal patching at the job site. Repair physical damage to the epoxy coating with a patching material all damaged coating areas greater than 1/4-inch (6 mm) square or 1/4-inch (6 mm) diameter; approximately 1/8-inch (3 mm) square or 1/8-inch (3 mm) diameter if the opening is within 1/4-inch (6 mm) of an equal or larger opening; or, a length of 6 inches (150 mm) regardless of area. Coating damage in cases where the damaged area is less than specified above, need not be repaired. Use patching material of the same composition and quality as the original coating. Prepare the surface to a near white metal.
If repair is required, clean and repair the
damaged areas and allow adequate cure time before placing concrete. The Engineer will approve the installation once patching
has been done as outlined above.
509.10 Method of
Measurement. The Department will measure Epoxy Coated
Reinforcing Steel by the number of pounds (kilograms) shown on
the plans. Additional measurements or
calculations are not required.
If the Contractor believes the pay weight, as shown on the plans, is in error, the Contractor is responsible to prove this discrepancy by recalculating the total weight for the reference number involved. The Contractor shall submit its figures to the Engineer for review and approval. The number of pounds (kilograms) of reinforcing steel shall be the actual number of pounds (kilograms) of the various sizes incorporated in the concrete as shown on the plans, completed and accepted.
If the weight of the reinforcing steel is
recalculated, determine the number of pounds (kilograms) from the number,
length, and weight of the bars as shown on the steel list of the plans, based
on the weight per foot (meter) shown in the Table 509.05-1 (509.05-1M) with deductions
for bars not used, and addition for extra bars used as directed by the Engineer.
509.11 Basis of Payment. The Department will not include the supports, mechanical connectors, and tie wires in the calculated weights but will consider them incidental to the price bid.
The Department will pay for accepted quantities at the contract price as follows:
Item unit Description
509 Pounds (Kilograms) Epoxy Coated Reinforcing