I mount my blue ( in theory any colour lol pipe) on canes & push the canes into the ground, that way I can vary the height of the tunnel I create for different crops. As I have long narrow beds all the same width, give or take, the hoops are interchangeable on each bed. Beds are about 5ft wide, should really be a bit narrower,but it was from when we used to dig & had a rotorvator & hubby needed that width to make it viable. Ideally 3ft wide beds are recommended so you can reach from either side easily, & never walk on the soil.