Self Rising Hinges

Firblog

Hi, I'm looking for a set of rising hinges for a heavy gate, appreciate if anyone could post a link to where I can get them.

Found these, but they're not right, need to be more like the Tee hinges here

The Continental Op

Do they exist? The only ones for gates would be for field gates like these Rising Self Closing Gate Hinge Set

There is another way to do it by having an offset Tee hinge on the bottom so the gate is thrown out as you open it. I'll see if I can find one.

Edit> nah, can't find them but I've seen them on stable doors they are like this https://www.gatesplus.com.au/Rising_hinges.html with the bottom hinge offset so the bottom of the door rises as you open it.

Gen.Zhukov

Firblog wrote: »

Hi, I'm looking for a set of rising hinges for a heavy gate, appreciate if anyone could post a link to where I can get them.

Found these, but they're not right, need to be more like the Tee hinges here

Would getting the ones in the first link and adding a triangular piece to make them look/work like the Tee hinge be an option?

policarp

If you want to use Tee hinges you could set the hinges off plumb.
Same as rising hinges.

chooseusername

Firblog wrote: »

Hi, I'm looking for a set of rising hinges for a heavy gate, appreciate if anyone could post a link to where I can get them.

If you can fabricate or adapt a bottom hinge so it is offset it should be easy .
The gate would need to be hung at the rear ,ie the uphill side of the pier .
You could use this calculator ;

http://www.eversholt.org.uk/gates/

It's not easy to follow but it would mean your gate would be upright, but tilted up when opened and so clear the higher ground.
Or you could use the formula ;
O/S = R(H/W).
where O/S is the offset
R = rise required
H = distance between upper and lower hinge on gate.
W= length of gate to include top hinge
From a point directly below the top hinge (where a normal bottom hinge would be)
your new bottom hinge on the pier is offset an angle (45degs if you want it upright when opened to 90degs)and the gate part of the hinge is extended
such that the gate is upright when closed and will be upright when opened.
I can help you with the measurements if you wish.

chooseusername

OK, as a follow up to above,
I've had a bit of spare time and tried out above using an old free version of Sketch up.
Now I haven't seen rising gate hinges in the real world, so maybe the devil's advocates here on boards would prove or disprove my workings.
The example I'm going to use is;
A gate 2 mtrs wide with a 1 mtr. pitch between the hinges and requiring a 300mm rise to clear the rising ground.
Using the formula or the Eversholt calculator above the bottom of the gate would need to be moved 150mm out of plumb when opened 90°.
So rather than moving the bottom rotation point 150mm at 90° resulting in the gate leaning when opened, if it was moved 106mm at 45° diagonally and the gate and pier part of the hinge extended accordingly, the gate would be upright when opened to 90°.
The 106mm is the hypotenuse of a right angle triangle with two 75mm sides (see 'triangle' jpg. below)
In the example I've placed the top hinge on the 'closed gate' face of the pier and the bottom hinge on the rear or uphill face of the pier.
But both hinges could be placed on the rear face of the pier with spacers on the gate and pier to allow the hinges to align with the rotation points.
What do ye think, would it work?
Edited to add a 3d image might make it a bit easier to visualise