Live Load Deflection
Live Load Deflection
(OP)
Should I calculate the deflection based upon the full live load or the reduced live load when comparing it to L/360?
In this particular case, my reduced live load is 64% of the full specified live load. It is a hotel beam supporting the precast at the corridor.
In this particular case, my reduced live load is 64% of the full specified live load. It is a hotel beam supporting the precast at the corridor.






RE: Live Load Deflection
Regards
Dave
RE: Live Load Deflection
Be consistent with your design approach in sizing the beam. If you used the reduced live load to design the beam, use the reduced live load for serviceablity. The purpose of the reduction is to account for the fact that the structure may never actually see the full live load. In other words, compare apples to apples.
If you are comfortable from a design standpoint that the beam will not fail using the reduced live load, the same should apply for the deflection.
Good luck.
RE: Live Load Deflection
RE: Live Load Deflection
Lutfi
www.cdeco.com
RE: Live Load Deflection
RE: Live Load Deflection
I support the viewpoint to be consistent. You size members with both strength and serviceability considerations. If the tributary loading area of the beam is larger than, say, 80 sq.m, the reduction factor should be used. The 1/360 limit was setup for damages like cracks, etc.
RE: Live Load Deflection