TESTS TO CHECK THE INCREASE IN PERMITTED LOADING OF STRUCTURAL STEEL SUPPORTS WITH A PULL-OUT DEVICE

VERSUCHE ZUM NACHWEIS ERHOEHTER ZULAESSIGER BELASTBARKEIT VON BAUSTUETZEN AUS STAHL MIT AUSZIEHVORRICHTUNG

TESTS WITH SIZE 3 ACROW-WOLFF SUPPORTS SHOWED THAT UNDER CERTAIN CONSTRUCTION PRACTICE CONDITIONS WHICH ARE EASY TO ESTABLISH (FLAT STORAGE ON SQUARE TIMBER, REDUCTION OF FORCE ECCENTRICITY DUE TO GIRDER FORK) FOR SUPPORTS UP TO 3.50 M IN LENGTH, AN INCREASE OF ADMISSIBLE LOADING BY AT LEAST 50% IS ACCEPTABLE COMPARED WITH THE REGULATIONS IN FORCE.