(1) The driveway to the building must be designed to allow an emergency vehicle access in accordance with this regulation.
(2) The driveway to the building must be designed so that—
(a) any curves in the driveway have a minimum inner radius of 10 m; and
(b) the average grade for the driveway is no more than 1 in 7 (14·4%) (8·1 o ) with a maximum of no more than 1 in 5 (20%) (11·3 o ) for no more than 50 m; and
(c) any dips in the driveway have no more than a 1 in 8 (12·5%) (7·1 o ) entry and exit angle.
(3) If the driveway from the road to the building or static water supply, including gates, bridges and culverts, is greater than 30 m in length, the driveway must—
(a) be designed, constructed and maintained for a load limit of at least 15 tonnes and be of all-weather construction; and
(b) provide a minimum trafficable width of 3·5 m, and be clear of encroachments to a height of 4 m from the ground.
(4) If the driveway from the road to the building or static water supply is longer than 100 m, a turning area for emergency vehicles close to the building must be provided for by either—
(a) a turning circle with a minimum radius of 8 m; or
(b) the driveway encircling the building; or
(c) a T head or Y head with a minimum forced surface of each leg being 8 m in length measured from the centre point of the head and 4 m trafficable width.
The following diagrams illustrate aspects of subregulation (4)(c).
Regulation 161—Y head Regulation 161—T head
(5) If the driveway from the road to the building or static water supply is longer than 200 m, passing bays must be provided every 200 m and must—
(a) be 20 m long; and
(b) have a trafficable width of 6 m.
(6) In this regulation static water supply has the same meaning as in regulation 160.