1. CONSTRUCTION

• (1) 

  The container or compartment shall provide for total enclosure of the electric detonators.
• (2) 

  There shall be no access to the contents of the container or compartment from the inside of the cargo compartment of the vehicle.
• (3) 

  The top, lid or door, sides and bottom of the container or compartment shall form a laminate barrier constructed from inside to outside in the following order:
  • (a) 

    14 mm (1/2-inch) exterior type fir plywood, good two sides (G2S);
  • (b) 

    25 mm (1-inch) Fiberglass AF 545 or AF 570;
  • (c) 

    1.9 mm (0.075-inch) mild steel plate; and
  • (d) 

    14 mm (1/2-inch) exterior type fir plywood, good two sides (G2S).
• (4) 

  The laminations of the container or compartment shall be bonded together by a suitable adhesive, rivets or other equally effective means.
• (5) 

  The mild steel plate referred to in paragraph (3)(c) shall be overlapped or continuously welded at all joints and seams.
• (6) 

  The door or lid of the container or compartment shall
  • (a) 

    fit snugly;
  • (b) 

    have a continuous piano-type hinge or at least three hinges; and
  • (c) 

    be equipped with a locking device.
• (7) 

  Interior surfaces of the container or compartment shall have a smooth finish and be free from any exposed sparking metal.
• (8) 

  A container or compartment mounted outside the cargo compartment of the vehicle shall be
  • (a) 

    completely covered with a sheet metal of minimum thickness 0.75 mm (22 gauge);
  • (b) 

    protected from missiles by a suitable guard mounted between the container and the wheels; and
  • (c) 

    separated from any part of the exhaust system by at least 7.5 cm (3 inches).

2. MARKING

• (1) 

  The interior surface of each laminate construction of the container or compartment shall be marked in letters and numbers at least 14 mm (1/2-inch) high as follows:

(See Schedule IV to Explosives Regulations)

• (2) 

  The lid or door of a container or compartment shall, when it contains electric detonators, be marked “DETONATORS” in letters at least 14 mm (1/2-inch) high on a contrasting background, but this marking shall not be displayed when the container or compartment is empty.

3. LOCATION

• (1) 

  A container may be securely fixed or mounted in one of the following locations if no part of the container extends beyond the overall length or width of the vehicle or projects below the road clearance allowance, namely,
  • (a) 

    within the cargo compartment with a separate access door to the container in the side of the cargo compartment;
  • (b) 

    between the cab and the cargo compartment;
  • (c) 

    to the underside of the vehicle between the cab and the rear wheels of the vehicle and not projecting below the road clearance allowance; or
  • (d) 

    above the cab of the vehicle.
• (2) 

  A compartment for electric detonators may be constructed within the forward end of the cargo compartment of the vehicle with a separate access door to the electric detonator compartment in the side of the cargo compartment.