Document ID: chunk:federal_register_of_legislation:F2024C00337:body:0:p38
Version: federal_register_of_legislation:F2024C00337
Segment Type: other
Provision Reference: 
Character Range: 88558–91024

derrick heel block that is subject to movement in the vertical plane between load and no-load positions must be fitted with a device that constrains the movement consistent with safe operation.

7 Securing runners
       A runner used in loading or unloading must be attached to the winch drum:
(a) so that no part of the runner is damaged; and
(b) by means other than fibre rope.
Note 1   The method used to secure a runner to a winch should be by shackle or clamp-type socket, any of which should provide a strength equivalent to 50% of that of the runner.
Note 2   The number of complete turns remaining on the drum of the winch if the complete working length of rope has been paid out should not be less than:
(a) for an ungrooved drum — 3; and
(b) for a grooved drum — 2.

8 Markings required
      (1) A derrick for use in loading or unloading must be marked with:
(a) its safe working load for each operating condition, as set out in the rigging plan, drawings or instructions for the use of the derrick; and
(b) the lowest angle to the horizontal at which the derrick may safely be used, as set out in the rigging plan, drawings or instructions for the use of the derrick.
      (2) The marking of the safe working load of a derrick must be:
(a) if the derrick is to be used as a single derrick — the letters 'SWL' followed by:
 (i)  numerals indicating the safe working load; and
 (ii)  letters identifying the units of mass in which the safe working load is expressed; and
 (iii) if there is more than 1 operating condition — an oblique stroke separating the units of mass for each condition; or
(b) for a union purchase rig — the letters 'SWL(u)' followed by:
 (i) numerals indicating the safe working load; and
 (ii) letters identifying the units of mass in which the safe working load is expressed; and
 (iii) if there is more than 1 operating condition in union purchase rig — an oblique stroke separating the units of mass for each condition.
Examples of markings
(a) 'SWL xt', 'SWL x/yt' .
(b) 'SWL(u) xt', 'SWL(u) x/yt'.
      (3) Markings must be placed on the derrick or on a plate near the heel of the derrick.
      (4) The letters and numerals must be:
(a) at least 77 mm high;
(b) of proportional breadth; and
(c) of a light colour on a dark background or a dark colour on a light background.

9 Union purchase rig
       A derrick used in a union purchase rig must:
(a) be rigged in accordance with the drawings mentioned in clause 1; and
(b)