Abacus Lighting, Sutton-in-Ashfield, Nottinghamshire, NG17 5FT, England. Tel: (+44) 01623 511111, www.abacuslighting.com
3
2.
Installation
2.1.
General
The masts are used for sports lighting and general floodlighting applications typically up to 20m
in height. Each mast is supplied in kit form for on-site assembly. The foundation bolts should be
cast in concrete not less than 1 week prior to erection of the mast to allow time to cure sufficiently.
Foundation block sizes for a variety of ground conditions can be supplied on request.
Masts are constructed from steel to EN10025 grade S275 and S355, pressed to form a tapering
octagonal shaft. The shafts are slotted together and require no on site welding or bolting. The
mast and foundation bolts are finished galvanised with small fasteners being from stainless steel.
In the following instructions mention is made of the minimum permissible shaft overlap distances
relating to tapered octagonal shafts. In addition, because these masts are designed for specific
applications it is essential that reference is made to the engineering drawings during assembly.
These will give details of the shaft design overlaps. The overlaps achieved on site will vary due to
manufacturing tolerances.
For shafts of 5mm or less in thickness the
minimum permissible overlap
can be determined
from Fig 1.
2.2.
Mast Positioning
It is essential that the area around the base is kept clear of obstructions at all times to allow for the
safe operation of mast and counterbalance. The illustration below gives details of the minimum
clearance zone around the mast, assuming a gear cabinet is installed and that the counterbalance
is positioned adjacent to the base.
