is complete the location for the scaffolding pipes can be marked boldly for example with green paint all the way across the top of the third course and also on the inside face of the wall so that they are difficult to miss to create the scaffolding the mortar and the bricks for the fourth course 43 are laid as normal but when a mark is reached a scaffold standard brick 18 or a scaffold u brick 19 is inserted as necessary while laying each scaffold brick a short level should be placed in the divot so that the scaffold bricks will be level and thus the scaffold pipes will be level when the fifth course 44 is ready for laying lengths of pvc pipes are laid in each scaffold brick divot these can be for example 2 in 50 mm outside diameter pvc pipe cut into 18 in 450 mm lengths the two mortar strips are laid right over the pvc pipes as normal the fifth course bricks are laid as normal but periodically a brick that has already been laid over a pvc pipe should be lifted to ensure the mortar has encased the pvc pipe the pvc pipes can be removed after about 20 minutes but being sure that the mortar is set well enough a 1 in 47 mm steel or aluminum scaffold pipe can be inserted in the hole to ensure the pipe slides freely through the wall after six courses of bricks have been laid over the top of the scaffold hole location an ordinary scaffold pipe 41 1 in or 42 mm in diameter is inserted into.