Bison Timber bridges have 3 steel structural beams with redwood deck boards, parapets and hand rails. They have a crowd loading of 5.0kN per square meter.
Bison Bridges are designed in strict accordance with the design manual for roads and bridges (DMRB) which is in general accordance with BS5400 part 2.
Timber deck boards have a dual non-slip strip in each board, assuring safe use in adverse weather conditions.
Timber deck boards are supplied with a 15 year warranty on the timber and a 5 year warranty on the non-slip component (although expected service life for this is over 10 years)