I want to build a road gate for a forest road apx. 10ft wide. I've fixed a gate at home and learned that hinges are a key point of failure and are strained more by weight and length of the gate. Given how long a road gate is, and how heavy long logs can be, how can I make the gate sturdy? Here's an example of the gate I'm imagining, but I'll be using freshly cut or recently fallen timber.
Specifically I'm wondering what properties the hinges should have.
My plan so far:For wood I'll use ~3-4" diameter poles of spruce and/or cedar. I figure I'll dig a hole with a post-hole digger, bury a post on both sides of the road, building the gate out of two logs at an angle to connect high and low on one of the roadside posts via hinges.
Should I have any additional parts, like some brackets, springs, and/or tension cables to help keep it sturdy? I want to build it to last, but I also know that over-engineering a gate too much can make it too heavy or complicated.