2400 33RD ST 2018-01-02 MF Import

SECTION 01400 QUALITY CONTROL 3. Welding Requirements: Special inspection shall be provided by the testing agency for all welding in accordance with the Building Code. a. Nondestructive testing shall be performed as required by the Building Code and AWS D1.1 as specified herein for all shop and field welds. b. All welds shall be visually inspected. Welds considered suspect shall be further checked by other means deemed necessary by the welding inspector. c. Ultrasonically test 100 percent of all complete penetration welds and 100 percent of all partial -penetration column splice welds. d. Ultrasonically test all joints where the base metal is thicker than 1 '/2 inches, when subjected to through -thickness weld shrinkage strains. The joint shall be ultrasonically inspected for discontinuities directly behind such welds after joint completion. e. When ultrasonic indications arising from the weld root cannot be interpreted as either a weld defect or the backing strip itself, the backing strip shall be removed at the expense of the Contractor, and if no root defect is visible, the weld shall be re -tested. If no defect is indicated on this re -test, and no significant amount of weld metal has been removed, no ''urther repair is necessary. If a defect is indicated, it shall be repaired at no expense to the owner. I. Perform magnetic Particle (MP) tests of fillet welds larger than 5/16 inch. g. The inspector shall perform magnetic particle testing in accordance with ASTM E709 for any questionable welds. h. See Specification Section 05120 "Structural Steel", for additional testing/quality control requirements. i. Exceptions: 1) When approved by the Resident Engineer, the rate of testing for ultrasonic testing of complete -penetration welds may be reduced in accordance with the following: a) The non-destructive testing rate for an individual welder or welding operator may be reduced to 25 percent, provided the reject rate is demonstrated to be 5 percent or less of the welds tested for the welder or welding operator. A sampling of at least 40 completed welds for a job shall be made for such reduction evaluation. Reject rate is defined as the number of welds containing rejectable defects divided by the number of welds completed. b) For complete penetration groove welds on materials less than 5/16 inch thick, nondestructive testing is not required provided continuous inspection is provided. c) When approved by the building official, nondestructive ultrasonic testing may be performed in the shop of an AISC approved fabricator utilizing qualified test techniques in the employment of the fabricator. 2) Other ultrasonic or magnetic particle testing may be reduced by approval of the Resident Engineer upon presentation of satisfactory documentation submitted by the Contractor. 3) There shall be no exceptions to the testing requirements for the SFRS. 4. Bolling Requirements: All inspection shall conform to the requirements of the current edition of the "Specification for Structural Joints Using ASTM Capital Projects Commuter Rail 01400-7 IFB No. RTA/CP 21-06 Everett Station Phase 2 QUALITY CONTROL