Frame parts made from plumbing conduit. The elbows and tees for electrical were unsuitable. I believe these are plumbing elbows and tees.
Pipe and fitting size for 27mm OD pipe.
8 Tee pieces
8 Elbows
16 lengths pipe 40mm (joiners)
4 lengths pipe 970mm (part A)
2 lengths pipe 610mm (part B)
2 lengths pipe 560mm (part C)
2 lengths pipe 400mm (part D)
2 lengths pipe 210mm (part E)
To fit over a wider window just increase the lengths of parts A.
To fit over a higher window just increase the lengths of parts B and E by the same amount.
To make it deeper is more complicated as it effects multiple parts. In the above frame the angle of the slope is 45 degrees.
Example:
To increase the depth (D) by 50mm while maintain the angle at 45 degrees of the roof.
Add 50mm to parts D. Also add 50mm to parts B and E and cut parts C to 1.4 times the length of parts D. This also makes the frame higher by 50mm but simplifies calculating the new length of part C and maintains the slope to 45 degrees..
I glued the front and back rectangles to make them rigid, being careful to maintain the angles of the Tee pieces. The parts C and D were kept removable to allow flat packing of the frame. When assembled, tapped firmly together and the cover fixed on with Velcro, the whole enclosure is very rigid. The cover is made from good quality shade cloth and polypropylene tarp. The sail rope edge is part of the roof. It is sewn together with an industrial sewing machine.
A piece of sail track is fixed at an appropriate distance above the window to allow the hutch hang over the window. It is then self supporting. An extra hammock of tarp fits internally between the parts D – D (using Velcro) for extra strength.
Callie loves her hutch.
