Truss Support Detail
Truss Support Detail
(OP)
When you have a long span structural steel truss, how does your end support detail usually look if you are supporting it with a wide flange column?
Also, when you design a structural steel truss, do you design the end conditions as pin-roller, even though that is difficult to achieve the field?
Also, when you design a structural steel truss, do you design the end conditions as pin-roller, even though that is difficult to achieve the field?






RE: Truss Support Detail
If a roof, I suggest that the truss bear on top of the column similar to manufacturered joist girders if possible. Details should be used to make erection as safe and to achieve overall stability as quickly as possible.
RE: Truss Support Detail
You could be conservative (for the truss's sake) and design the bottom chord as though it is pinned-pinned, and not pinned-roller....... then design the top chord as though it's a pin-roller support. I would also look at the pin-roller condition to determine the maximum horizontal movement you need to detail for. You know it will be less than that.
RE: Truss Support Detail
RE: Truss Support Detail
If the truss is a parallel chord floor truss you could connect the top chord and end diagonal to the flange of the column with an end plate and bolts. If you want continuity, you could connect the bottom chord the same way.
If you don't require continuity, you could terminate the bottom chord at the first panel point or, as is sometimes done, continue it to the column to provide erection stability but use a slotted connection such that the truss can develop full simple span rotation at each end.
BA