Special hinge...............To allow roof hatch to pivot open for head height and ventilation.
Our trailer had to have a loose pin hinging or be separable for when hatch is removed. Why remove the hatch? Well, so when the trailer goes into the garage the extra 5 inches in height is critical. Also, I want to build a clip on full height lantern top later, which will also utilise the hinges. Also in summer I want topless camping. yes?
OMG its just a locking door deadbolt and the strap of a gate hinge....all non corrosive metal.
