Posted by Neil on 8/21/02:
To build a riser, use really thick plywood and large washers, otherwise the seats will exert leverage on the bolts and pull them out of the wood.
When building the riser, bolt the wood frame together and screw the decking down, don't nail it. Seat leverage over time can act as a twisting force on frame which will wiggle nails loose.
If you're not building a riser you can still use two pieces of plywood glued together. The bolt heads/washers on the underside can be recessed pretty easily.
<>< Neil
Posted by Jan FPC Napa on 8/21/02:
We have theater seats and have them bolted to a sturdy frame in sets of 3 which can be moved.
Our "regular" workshop leader there (my husband!) is always re-aligning the seats trying to get the best viewing capabilities for the kids! Because the seats are flat and not on risers, that is something you would really have to decide before bolting.
Posted by Barbara in Portland on 9/20/02:
We bolted ours in rows of 4 on a 12"X2" piece of lumber with 2 cross pieces so the row can't be knocked over. You can them move them when needed, although they are quite heavy.
