Using
Weightanka
2
‐
16
of
28
NB.
Where a rope-adjuster is used, the distance D will be increased by any slack allowed in
the rope and by any travel in the device during the fall. The manufacturer of any such
device must be consulted for the determination of this additional allowance.
NB.
Similarly, where a retractable type fall arrester is used, there may be some extension of
the life line before the brake operates, thereby also increasing distance D. The
manufacturer of any such device must be consulted for the determination of this
additional allowance.
Manufacturers of these devices should also be consulted as to their suitability for
horizontal ‘over-edge’ operation, as not all types are acceptable.
The clearance distance then = D + E + F + G = A + C + E + F + G - B
and since C = 1metre, F = 2metres & G = 1metre then :
Minimum clearance distance = A – B + E + 4 metres.
*
“
* “ additional distance allowance may need to be made for some components see NB. above.
WARNING! If the roof surface is stone chippings, ensure that all loose chippings are removed from the
area where the WeightAnka will sit, and the area across which it could travel in the event of a fall arrest
incurring high forces. This may be achieved by sweeping the area with a hard broom. (See section 2.4
Page 9)
WARNING! Do not assemble Weightanka:
where water accumulates. Otherwise, wet conditions are acceptable.
where there is frost, ice or snow (or if these conditions are imminent);
if the roof or the rubber-coated base weights are contaminated by oil, grease or other lubricant;
if there is growth of algae on the rubber-coated base weights or in the area immediately
adjacent to them;
if there are loose chippings on the roof surface.
