SECTION 908 – BOLTS AND BOLTING MATERIAL
908.01 Steel Bolting Materials
Before using, submit a sample of each size of bolt, anchor, washer, and nut to the ME for testing and approval. Provide a mill certification for each heat.
908.01.01 Bolts
Use steel bolts conforming to ASTM A 307. If galvanizing is specified, use the hot -dipped method according to ASTM A 153.
908.01.02 Nuts and Washers
Use nuts and washers according to ASTM A 194 or ASTM A 563. Ensure that plain nuts are Grade 2H, DH, DH3, 2, C, D, or C3. Ensure that galvanized nuts are Grade 2H, DH, or DH3. Use washers with high-strength steel bolts conforming to ASTM F 436. If galvanizing is specified, use the hot-dipped method according to ASTM A 153.
908.01.03 Anchor Bolts
For anchor bolts intended for anchoring structural supports to concrete foundations, including piers, columns, column supports for sign support structures, lighting fixtures, traffic signals, steel bearing plates, and similar applications, use ASTM A 307, Grade C, or ASTM F 1554, Grade 36, 55, or 105, anchor bolts, as shown on the Plans. If galvanizing is specified, use the hot-dipped method according to ASTM A 153.
908.01.04 Adhesive Anchor Bolt Systems
Use anchor bolts conforming to ASTM A 307, Grade C. If galvanizing is specified, use the hot-dipped method according to ASTM A 153. Ensure that the adhesive anchor bolt system conforms to the following proof loading requirements: After concrete has achieved a minimum compressive strength of 3,000 pounds per square inch, perform proof loading on 10 percent of the installed adhesive anchors at each location where the anchors have been placed. Provide calibration certificates for the test equipment before testing. Perform all testing in the presence of the RE. Tension test the anchor bolt system according to ASTM E 488 to 90 percent of the yield strength of the anchor bolts. If the location of the anchor bolts precludes the proof loading of anchor bolts according to ASTM E 488, propose an alternate testing method to the RE for approval. Repair all spalls or cracks caused by the testing. Based on satisfactory performance in proof loading, the RE will approve the adhesive anchor bolt installation. The RE will reject the anchor bolt installation for failure to conform to the proof loading requirements. With the approval of the RE, replace the adhesive anchor bolt installation by using larger size anchors, increasing the embedment depth, or using another anchor bolt system.
908.02 High-Strength Steel Bolting Materials
908.02.01 Material Requirements
For structural steel erection and for steel to steel chord splices of sign structures, using high-strength steel bolts, including nuts and plain hardened washers according to ASTM F 3125, Grade A 325 or Grade A 490. When galvanizing is specified, use the hot -dipped method according to ASTM A 153. Treat galvanized bolts, washers, and nuts as an assembly. Store and ship the assembly in plastic bags placed inside wood or metal containers. Use ASTM F 3125, Grade A 325, Type 3 high-strength steel bolts for bolting unpainted corrosion resistant (weathering) steel.
908.02.02 Sampling and Testing Requirements for Bolt Assemblies
A.Sampling and Certification. Before use, submit a sample for each manufacturer’s lot, size of bolt, anchor, washer, and nut to the ME for testing and approval. Provide a mill certification for each heat.
B.Tensile, Proof Load, Hardness, and Coating Thickness Tests. For each lot, the manufacturer shall perform tensile, proof load, and hardness tests and shall measure galvanized coating according to ASTM F 3125, Grade A 325. Proof load test bolts according to ASTM F 606, Method 1. Perform wedge tension testing of full size bolts according to ASTM F 606. If bolts are to be galvanized, test after galvanizing. Proof load test nuts according to ASTM F 606; if galvanized, test after galvanizing, overtapping, and lubricating. If galvanized washers are supplied, perform hardness testing after galvanizing; however, remove galvanized coating before taking hardness measurements. Report the results of all tests and submit with certifications. Also report the location and date of testing.
C.Rotational-Capacity Test. Perform the rotational-capacity test on each lot of bolt, nut, and wa sher assemblies by the manufacturer or distributor before shipping and by the Contractor within the Project Limits before installation. Test high-strength steel bolt assemblies for the rotational capacity requirements according to NJDOT S -1 or NJDOT S-2 and the following:
1.Test a minimum of 2 assemblies per rotational-capacity lot.
2.Test each combination of bolt production lot, nut l ot, and washer lot as an assembly. Where washers are not required by the installation procedures, they need not be included in the lot identification.
3.Assign a rotational-capacity lot number to each combination of lots tested.
4.Assemble the bolt, nut , and washer assembly in a Skidmore -Wilhelm calibrator or an acceptable equivalent device for testing as specified in NJDOT S-1.
5.For bolts that are too short to be assembled in the Skidmore -Wilhelm calibrator, use a steel joint and test according to NJDOT S-2. After testing according to NJDOT S-1 or NJDOT S-2, loosen and remove the nut and examine the threads on the nut and bolt. If, for either assembly tested, there are any signs in the nut or bolt of thread shear failure, stripping, or torsional failure, the lot fails and is to be replaced.
908.02.03 Test Reports and Certification
Record the results of all tests. Also report the date and location of testing.
1.Mill Certifications. Provide mill certifications for each heat of steel used in the manufacture of the bolts, nuts, or washers. Indicate the place where the material was melted and manufactured.
2.Manufacturer Certified Test Reports. Provide manufacturer certified test reports from the manufacturer of the bolts, nuts, and washers. Include the following:
1.The lot number of each of the items tested.
2.The rotational -capacity lot number and t est results, as specified in 908.02.02.C, if performed by the manufacturer.
3.The results of all tests required in 908.02.02.B.
4.The date and location of testing.
5.The location where the bolt assembly components were manufactured.
3.Distributor Certified Test Reports. If the rotational-capacity test is performed by a distributor instead of a manufacturer, provide the test results on the distributor certified test reports. Report the rotational capacity lot number and test results as specified in 908.02.02.C and attach the manufacturer certified test reports.
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Source: Standard Specifications for Road and Bridge Construction, 2019 (rev. 2022-12-21) Edition. Pages 507–508 of 651. View official source ↗