I'm looking to build 2 driveway gates. The total opening is 2.8 m, so each gate will be around 6 mm short of 1.4 m. Ideally the gates will be made up of a frame using 4 x 2 treated timber (stiles, top rail, middle rail and bottom, then cladded with 1 x 4 upright boards to match fence). They will be about 1.8 tall, and will need to be strong. I know the poper way to go about this is to use mortise and tennon joinery, but I dont have a mortiser and also dont have the time to chop out 12 mortise's by hand. I have been thinking about half lapping the joins, but not sure if this would be strong enough. Does anyone have any advice?