L-girder support

[harrym]

One of my benches [the longest one] will be eleven feet long by twenty-two inches wide.  I plan to put ten-foot-long L-girders under it.  If I put the legs in one foot from each end, will I need a center set for support?  This will be under a ten track staging yard with not much scenery, just the weight of a lot of trains.

[wm3798]

My frames are 8' long L girders, and I have one end tied into the wall, and a set of legs at the other end... the equivalent span... so far no problems, although I'm noticing that one of the sidings in the paper mill has a bit of grade now, causing coal hoppers to roll out of place on their own.  But I don't think it's sagged more than a couple of mm, if at all...

If you're building your L girders out of 3/4 plywood, you shouldn't have a trouble at all.

Lee

[Frank Amato]

A 10' span is no problem, provided you're using 1x4 for the girder and 1x2 for the "web".  I have a 12' span, with the legs set in 2' from each end.

  Frank

[DKS]

One of my benches [the longest one] will be eleven feet long by twenty-two inches wide.  I plan to put ten-foot-long L-girders under it.  If I put the legs in one foot from each end, will I need a center set for support?  This will be under a ten track staging yard with not much scenery, just the weight of a lot of trains.

You should be fine with no center support. However, I would place the legs 2 to 2-1/2 feet in from each end.