Deflection Limits for Bridges
Deflection Limits for Bridges
(OP)
Hello bridge engineers,
I've been asked to design a bridge for a client who makes temporary bridges. The client had another engineer making drawings for him, and I've been provided with a sample drawing. These bridges are very basic and are composed of longitudinal beams with a lumber deck. The abutments are out of scope.
I've read through CSA S6-00 and I can't seem to find a deflection limit for the girders. The beam sized by the other engineer appears to undergo excessive deflection under live loads (something in excess of the L/300 range). Although I'm wondering if the deflection limit is less stringent for temporary structures. Any guidance on where to find deflection limits in S6 would be appreciated. Also, I'm wondering if S6 would define what is temporary. I'm thinking the client may be using this on a more permanent basis, but I'd like to know what the threshold is.
Thank you in advance.
I've been asked to design a bridge for a client who makes temporary bridges. The client had another engineer making drawings for him, and I've been provided with a sample drawing. These bridges are very basic and are composed of longitudinal beams with a lumber deck. The abutments are out of scope.
I've read through CSA S6-00 and I can't seem to find a deflection limit for the girders. The beam sized by the other engineer appears to undergo excessive deflection under live loads (something in excess of the L/300 range). Although I'm wondering if the deflection limit is less stringent for temporary structures. Any guidance on where to find deflection limits in S6 would be appreciated. Also, I'm wondering if S6 would define what is temporary. I'm thinking the client may be using this on a more permanent basis, but I'd like to know what the threshold is.
Thank you in advance.






RE: Deflection Limits for Bridges
"Temporary" is subjective. At times, we take chances when something is short term. Maybe a day or a week or two, what will go wrong? As Dirty Harry would say " you feeling lucky?"
RE: Deflection Limits for Bridges
Any S6 folks care to weigh in?
RE: Deflection Limits for Bridges
RE: Deflection Limits for Bridges