Woodworker's Journal 2008-32-3, страница 51

Attach the polyethylene sheeting to the panels with staples. Work from the panel middles to the corners to avoid wrinkles. Then cut wood trim pieces, shown above, to fit over all edges and over the cross braces. Nail them in place with brads or with a power nailer.

Once the trim pieces are in place, carefully cut off any excess sheeting with a utility knife. Use the trim pieces to guide the knife.

Making the Platform

Cut decking boards and sleepers (pieces 18 and 19) to 55" lengths and assemble them using galvanized screws. Evenly space the boards, allowing gaps for water to drain through to the ground. Use pressure-treated wood for all decking boards as they will be subject to moist conditions and would otherwise rot.

Erecting the Greenhouse

You are now ready to erect the greenhouse. With the assistance of a helper or the use of clamps, join the front wall to a sidewall with three hinges and secure it to the platform with a fourth hinge. Use bolts and wingnuts with all platform connections to make disassembly quick and easy. Assemble the back wall and the remaining sidewall in the same manner and attach it to the platform.

Then bore holes for joining the walls at the non-hinged corners and fasten these with bolts and wing nuts. Carefully attach the roof panels with bolts and wing nuts as well. Although the structure is quite stable at this point, I recommend the added precaution of staking the platform to the ground. Simply bore holes in the platform corners and drive landscape spikes through them.

jgg^SjfSJI At the non-hinged corners, drill holes in the framing for 3/16"-diameter bolts. A good way to keep the holes plumb is with a simple homemade jig, as shown. Pre-bore holes in the jig to guide the drill bit.

Once the wall panels are completed, you can clamp them together (check for square as you go) and fasten the remaining hinge leaves to the frame with screws. Clamp the hinges in place as you proceed around the corners.

Brace the two roof panels together at the proper angle. A helper or workstation with a clamp will come in very handy for this operation. The author recommends joining the roof panels along the ridge with three hinges.

Woodworker's Journal June 2008

51