Hinges for centre pivot greenhouse window from scrap

To improve the summer cooling of our green house/ chook house there is a part of the wall has a centre pivot opening so it can be opened when it is hot and closed during the colder times.  It acts with the sun facing window so a flow of air is created.  After 20 years, the wood wore so the hinge was loose and the window would not open without some effort.  The hinges needed a slight redesign.  To create wearing parts, a length of poly (black agricultural) pipe was placed over some copper pipe of the same length.  The poly is softer than the copper and the wood so is the sacrificial element instead of the wood wearing.  It was also necessary to make the hole bigger to accommodate the bigger pipe.  Few scrap bits and the job is done.  Never throw anything out because as soon as you do, you will need it.  A manufactured hinge to do the same job may be north of $20.00 for a good quality product that will carry the load and stand up to the wind force.  I used a saw to cut the poly once it was on the copper to make it easier to allow the poly to move with the wood and minimise friction.  We use the same system for vertical openings such as doors also with the keep plates on the door and washers as spacers.  In high usage areas, a small glass marble sits under the bottom keep plate

I cannot make out the completed window, is there another image please?

John C Daley wrote:I cannot make out the completed window, is there another image please?

Hi John,
The photos under show the complete window.  I cannot get an inside shot because the light makes the picture too dark and there is not enough room to get it in.  The construction is 38 X 75 mm treated pine.  The top of the window closes onto a steel strip so it cannot close past vertical.  The hinges are just above half way to make opening and closing easy when we get old.  Happy to try for a better view if needed, just PM me
Cheers

I understand the drift of your design now.
Clever, how many different materials have you on the outside walls?

John C Daley wrote:I understand the drift of your design now.
Clever, how many different materials have you on the outside walls?

The back (South) and West side are fibro.  The East side where the door is is alsynite ( fibreglass roofing sheets)to let the early light in and the north wall is 2 sliding glass doors on their side with the bottom one able to open at the top.  The wall slopes at 73Deg so it catches the winter sun straight on and the summer sun is blocked by the overhang.

The reason the back looks different is that I got hold of a number of fibro sheets that were the worst for wear and cut them into strips.  The straight sheets are an add on where I increased the size of the green house and gave the chooks a full height roost.  The girls have an automated door opening just after sunrise and closing 1/2 hour after sunset.  This achieved by a solid state relay (SSR) with a timer function controlled by the solar panel turning on in the morning and off at night (sorry could not find the details).

Sounds like a palace.