digga Posted December 4, 2016 Report Share Posted December 4, 2016 hi ive got a job hanging some field gates and got to hang them as close to the ground as possible as got to rabbit proof them . so will be adding weldmesh to them and putting bottom adjustable hinges on them as normal. will offset the bottom hinge as some will need to rise up as they open but want to keep the offset to a minimum . my question is does anyone know the formula or calculation to work out how much lift you will get to how much offset on the hinge to the length of the gate? know you wont get the full effect of the lift till the gate is opened to 90 degrees many thanks Link to comment Share on other sites More sharing options...
MikeW Posted December 4, 2016 Report Share Posted December 4, 2016 What you need to do is open the gate up to the highest point, then you extend the bottom ride to the required length to make sure it keeps the gate off the ground (taking into consideration the length of your hook to drive out of the post) Then shut the gate back to the post and where your eye is in comparison to the post is where you put your hook to drive. It may be that the distance is too much in which case you need to move your top ride over or knock in the top ride more than the bottom which jacks the gate even more but looks odd, also consider driving the gate post so it is leaning with the slope and then when the gate opens back the lean on the post will amplify the lift. Sometimes doing this is necessary with large gates in sloping gateways. Hope this makes sense Link to comment Share on other sites More sharing options...
Goaty Posted December 5, 2016 Report Share Posted December 5, 2016 Nice one Mike it makes sense to me. Digga are you putting a kerb of any kind in? Sleepers or telegraph poles. Because rabbits will dig or even squeeze through if they can. I would put both hinge crooks in a vertical plumb line as you will need to mesh over the hinge part or put a flap of rubber or such from top to bottom. Link to comment Share on other sites More sharing options...
digga Posted December 5, 2016 Author Report Share Posted December 5, 2016 ones ive done there before i put a concrete pad between the posts and extending just infront of the gate and put a wooden nailing strip at the very bottom of the gate to fix the bottom of the weld mesh to and fill the gap between the gate and post on the hinge side . posts have got to be dug in due to amount of services around that are not accurately marked normally do simular to what what mike said . was just trying to find out if theres was a calculation or formula to work it out to show the customer the maths as there one of these that like to see stuff on paper and diagrams . im sure we all get them from time to time ;-) ps thanks for the responses guys wealth of knowledge and experience here which is why i thought i would ask Link to comment Share on other sites More sharing options...
Mooresft Posted December 5, 2016 Report Share Posted December 5, 2016 Well.... I think, from a few calculations that every 2.5cm you move a 360cm (12ft) gate out on its bottom hinge should pick it up 7.5cmdont quote me tho...how big is the gate digga? Link to comment Share on other sites More sharing options...
digga Posted December 6, 2016 Author Report Share Posted December 6, 2016 the gates are anything from 6ft to 12ft other gates ive hung there work fine and remained rabbit proof. like i said just one of those customers that likes stuff on paper and diagrams especially the new guy Link to comment Share on other sites More sharing options...
Mooresft Posted December 6, 2016 Report Share Posted December 6, 2016 Download a trig solving app and use that to mock up some diagrams, that will give him something to look at. Basically every inch on the bottom hanger moves the gate up by 1.2 degrees I think Link to comment Share on other sites More sharing options...
digga Posted December 12, 2016 Author Report Share Posted December 12, 2016 thank you for the help and replies guy Link to comment Share on other sites More sharing options...
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