The chemicals used to treat the wood are toxic when burned. You must properly apply an approved fire retardant to all wood surfaces. A list of approved fire retardant suppliers will be provided when you submit your plans for construction. D. Carriage bolts, nuts, lag screws and washers must be used to assemble the loft. No nails may be used.
Bolts are stronger than nails and can be removed easily.
Washers allow the bolts to be tightened without pulling them into the wood. It is highly recommended that you check and re-tighten all fasteners periodically after assembly. It is highly recommended that carriage bolts be inserted in the wood from the exposed side so the washers and nuts are on the hidden side of the loft frame. The top of the mattress must be no less than four feet from the ceiling or no higher than five and one-half feet from the floor, whichever is lowest. C. Do not block doors, windows or heaters with lofts.