WELDED HOT-ROLLED HIGH-STRENGTH STEEL STRUCTURAL MEMBERS AND METHODS

摘要

Hot-rolled high-strength steel elongated structural members and method of making same are disclosed by hot-rolling high-strength steel having a specific chemical composition to provide structural units. The units are then welded together to provide structural members of desired geometrical configuration including a thin web with opposed thicker flanges extending therefrom to increase the load bearing capacity of the members.

主权项

1. A method of making a welded high-strength steel elongated structural member comprising
providing high-strength steel having a tensile strength of at least about 120,000 psi and a yield strength of at least about 90,000 psi, hot-rolling the high-strength steel to provide a first structural unit having a set cross-sectional configuration over at least a portion of the member length, said set cross-sectional configuration including a first flange precursor portion and a first web precursor portion extending from the first flange portion, hot-rolling the high-strength steel to provide a second structural unit having a set cross-sectional configuration over at least a portion of the member length, the set cross-sectional configuration including a second flange precursor portion and a second web precursor portion extending from the second flange portion, welding the first web precursor portion of said first structural unit to the second web precursor portion of the second structural unit to form a welded web portion of an elongated structural member having a set cross-sectional configuration with said first and second flange portions extending from the welded web portion, said web portion having an average thickness less than the average thickness of the lesser thickness of said upper and lower flange portions.