...R H EVANS; A D WHITE; J FORD; S D LASH; R J NICHOLAS; A LIPSKI; K W LEUNG; A S G BRUGGELING; R J BLAKE; B A HASELTINE; SAFFERY; R G TYLER; RRL © Thomas Telford and ICE 1966 ROAD RESEARCH LABORATORY RRL CHARACTERISTICS PREFLEXED PRESTRESSED CONCRETE BEAMS LOADS TESTS CRACKS...

... preflexed and two unpreflexed, show that there is a definite advantage to be gained by preflexing the steel joists. The results also show that the design procedure put forward by the originators1 overestimates the working load. NOTATION Equivalent area of joist and precast concrete in steel units Total area...