Lateral Propping for Precast Slender Beams
Lateral Propping for Precast Slender Beams
(OP)
HI,
guys i have Precast beams of 1.8 meter deep and 400mm width so basically very slender beams, now do i need to prop them Laterally? like we do precast walls?
Regards,
guys i have Precast beams of 1.8 meter deep and 400mm width so basically very slender beams, now do i need to prop them Laterally? like we do precast walls?
Regards,






RE: Lateral Propping for Precast Slender Beams
ACI 318 requires lateral support for flexural members if the span (or spacing of lateral bracing) exceeds 50 times the width of the "the least width of compression flange or face". So I don't know what your span is......but you may not need it.
If it comes right down to it: you can calculate the LTB/Buckling value raw...... and (with a healthy safety factor) check it yourself.
RE: Lateral Propping for Precast Slender Beams
PCI recently published a guide for precast concrete stability -- formalizing the research by Mast years ago that has been used successfully for the past decades. I recommend it as a good introduction.
RE: Lateral Propping for Precast Slender Beams
Regards
RE: Lateral Propping for Precast Slender Beams
In some circumstances, you can get away without lateral propping. In some circumstances, you might need it, even with that relatively short span.
RE: Lateral Propping for Precast Slender Beams
I wouldn't think that would be an issue at all.