Guide for size of Sliding Gate Motors

If a sliding gate is on sloping ground the motor must lift a portion of the weight of the gate in one direction and prevent it from closing too fast in the other direction.  Motors are rated for the maximum weight of gate it can handle but if the gate is on a slope the effective weight of the gate increases depending on how steep the slope is, the size and weight of the gate.

Generally motors rated for gates 350kg to 400kg can only be used on very light weight gates less than 3m wide x 1.2m high rising less than 100mm over 3m.  For motors rated for 500kg and higher here's a guide based on actual experience installing sliding gates on sloping ground:

For Motors rated for gates to 500kg 

Aluminium Gates with Tubing for cladding or Chain link Gates so are relatively light weight.

Steel Gates with Tubing for cladding, Aluminium gates with Slatted cladding or Gates with a light weight metal frame and light weight timber cladding or sheet metal cladding.

Heavy Steel Gates or Gates with heavy timber cladding  

For Motors rated for gates to 800kg  

Aluminium Gates with Tubing for cladding or Chain link Gates so are relatively light weight.

Steel Gates with Tubing for cladding, Aluminium gates with Slatted cladding or Gates with a light weight metal frame and light weight timber cladding or sheet metal cladding.

Heavy Steel Gates or Gates with heavy timber cladding