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Kingston,Mi | Is this design engineered or just S.W.A.G.G.ED? 52 years ago I worked as the assistant to a master carpenter building 126 beams for an portable school consisting of 63 units. Some beams were 60 feet between supports, others had interior walls, because of this the shape of the beam changed. The longer spans had more camber on the bottom chord (and of course the top chord). When these beams were installed on the end walls and the rest of the roof installed, the finished ceiling settled to flat. This school was going to be assembled and used in part of Michigan's snow belt at Maple City/Glen Lake near Traverse City Mi.
These beams were built of standard building grade lumber and plywood with exterior glue. The lumber was precut in the saw shop, assembled at our work station with exterior glue and a power nailer. Then the exterior grade plywood was glued and nailed down to the framework. Flipped the beam and attached the second skin. Lift the beam and move over the freshly arrived trailer chassis. Repeat 4 times a day. | |
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box beam project-trying to span 44 feet
