Beside the mechanical splicing with bolts and nuts , the longitudinal connection for structural steel members may be by means of butt welding . Butt welded joints deployed on main structural members such as for pipe pulling , should be examined by radiographic tests to inspect the quality of the finished welds . This tests must be conducted by the Independent Welding Inspector and test reports should be endorsed and submit to the Engineer for record purpose . The site supervisor should record during the welding process the type of welding consumables used , ampere of electric current , preheating condition , numbering of structural members , etc and furnish to the Independent Welding Inspector for information to prepare the test reports .
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