4(b) reading comprehension
How to prepare a foundation for a brick wall
1 mark out the trench with lines and pegs.
2 dig out the trench with a pickaxe and shovel until it is about 150 mm deep and 300 mm wide
3 check that the floor of the trench is horizontal using a plumb-and-level.
4 make sure that the sides of the trench are vertical.
5 place pegs in the floor of the trench and stretch a line between them.
6 check that the line is horizontal.
7 fill up the trench evenly with concrete until it is level with the line.
8 leave the concrete until it is hard.
9 build the wall on the concrete.