Gate hanging allowances

Gate hanging allowances

Gate hanging allowances

The adjustments you need to make to allow for different hanging styles and types of ironwork can be confusing, ive tried to explain the most common below but please ring if in any doubt and i will gladly work out the gate size for you.

Ironwork

The most common ironwork used for hanging the heavier 3inch (75mm) gates, its a double strap style to give extra support across the morticed and tennoned joint. There are 2 main ways of using this ironwork, between or off the back of your posts.

Hanging your gate between the posts allows it to swing 90degrees both ways, in and out, to do this you need to allow 4.5inches between the post and the gate upright (figure 1 below). To make sure that the gate doesnt fit tight to the swinging end post then please allow an extra 1/2 inch (12mm), making a total of 5 inches (125mm) off the total gap between your posts.

i.e. if the total gap between your posts is 12 foot - 144inches, then the size of gate you need is 139inches. (144 minus 5)

 If you are hanging 2 gates as a pair between your posts then you need to allow 9.5inches (240mm) off your gap. ( 2x4.5inches ironwork allowance = 9inches + 1/2inch allowance where the gate meet in the middle = 9.5inches)

hanging1  FIGURE 1

Hanging you gate off the back of the posts is the most common and easy way to hang your gates, you dont have to be so precise as the gate hits the back of the swinging post so it doesnt really matter if it hits a bit further along. Idealy you want your post hooks to sit in the middle of the post (figure 2) and your gate to hit about 1.5inches up the swinging post.

hanging2

To calculate your gate size for this hanging style and to get your gate pins in the centre of the post depends on post sizes.

  Hanging on a 6x6inch post you need to ADD 2.5 inches (63mm) to your gap between posts for your gate size. (3inches to the centre of post, minus 2inches to allow for ironwork = 1inch, plus 1.5inches for the swinging end overlap = a total of 2.5inches) - If hanging 2 gates as a pair please add 1.5inches (38mm) to the gap between your posts, then divide the final gap into the 2 gate sizes that you preffer.

  Hanging on a 7x7inch post you need to ADD 3 inches (75mm) to your gap between posts for your gate size. (3.5inches to the centre of post, minus 2inches to allow for ironwork = 1.5inches, plus 1.5inches for the swinging end overlap = a total of 3inches) - If hanging 2 gates as a pair please add 2.5inches (63mm) to the gap between your posts, then divide the final gap into the 2 gate sizes that you preffer.

  Hanging on a 8x8inch post you need to ADD 3.5 inches (87mm) to your gap between posts for your gate size. (4inches to the centre of post, minus 2inches to allow for ironwork = 2inches, plus 1.5inches for the swinging end overlap = a total of 3.5inches) - If hanging 2 gates as a pair please add 3.5inches (87mm) to the gap between your posts, then divide the final gap into the 2 gate sizes that you preffer.

i.e. If you have an 11foot, 132inch gap between your posts and you are hanging off an 8x8inch post then your a single gate needs to be  135.5inches (132 + 3.5inches for an 8x8) or for a pair divide this gap into 2 sizes that you like i.e. 100 and a 35.5inch gate.

hanging3