10.4.3. Protection of manholes:(1) A portable guardrail made of steel or wood must be used to prevent falls into manholes.
(2) Where the guardrail is made of steel, it must:(a) be made of metal tubes at least 22 mm in diameter enclosing the manhole on 3 sides, the fourth side being closed off with 2 chains;
(b) be bright in colour, have a middle rail and bear flags with reflective bands; and
(c) conform to figure 1 in Schedule 5.
(3) Where the guardrail is made of wood, it must:(a) be made of boards 100 mm in width and must enclose the manhole on 3 sides, the fourth being closed off with 2 chains;
(b) bear vertical black bands 100 mm in width on an orange background;
(c) be fitted with flags with reflective bands; and
(d) conform to figure 2 of Schedule 5.