Marine Order 32 (Cargo handling equipment) 2016

A derrick for use in loading or unloading must be marked with:

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

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.

The marking of the safe working load of a derrick must be:

if the derrick is to be used as a single derrick - the letters 'SWL' followed by:

numerals indicating the safe working load; and

letters identifying the units of mass in which the safe working load is expressed; and

if there is more than 1 operating condition - an oblique stroke separating the units of mass for each condition; or

for a union purchase rig - the letters 'SWL(u)' followed by:

numerals indicating the safe working load; and

letters identifying the units of mass in which the safe working load is expressed; and

if there is more than 1 operating condition in union purchase rig - an oblique stroke separating the units of mass for each condition.

'SWL xt', 'SWL x/yt' .

'SWL(u) xt', 'SWL(u) x/yt'.

Markings must be placed on the derrick or on a plate near the heel of the derrick.

The letters and numerals must be:

at least 77 mm high;

of proportional breadth; and

of a light colour on a dark background or a dark colour on a light background.