# Mesh FAQs

#### How many bar chairs will I require?

On average, allow for 1 chair for every square metre. Depending on the weight of mesh required in the slab, this figure can increase to 1 chair per every 0.64M2 – 800x800mm square.

#### How many lengths of trench mesh will I need?

Firstly calculate the total lineal metres. For a single layer of trench mesh, divide this figure by 5.5. You now have the total number of trench mesh (6 metre lengths) required for the job. If a double layer of trench mesh is required, then double this figure.

#### How many trench mesh supports will I require?

Once you have determined the total linear metres, it is generally agreed that 1 support for each linear metre will be enough.