[TheWire]

Hi Jerry - Good your experienced with the epoxy. I chose 1/8" as this doubled the stiffness of the beam with the calculated stiffness. I wouldn't go thicker, prefer to make the timber bigger and stay with 1/8". But if you use 2x LVL I suppose 1/4" gets you more stiffness.

Some of the laminated ply with aluminium: the Al is a very soft grade which won't take bolt loads very well.

Here's some scrap for you? Peter

Its been an interesting learning experience with the gantry beam. A couple weeks ago I would have thought steel from a building frame would have been stiff enough for a gantry. Then I thought 1 LVL would be fine. Then 2 LVLs. Then I likely will have to laminate aluminum on to it.......