The trusses are manufactured from softwoods strength graded in accordance with either BS4978, BSEN518, BSEN519 or as recommended in BS5268 Part 2. The punched metal plate timber fasteners have been tested and certified by UK Accreditation Authorities.

All trussed rafter designs are prepared in full accordance with the relevant British Standard Codes of Practice, notably BS5268 Parts 2 and 3. Designs also fully meet the requirements of Buildings Regulations.