Pole manufacturing plant

A mechanised system of manufacturing, utilising a track

mounted winding machine onto which both the glass

filament rovings and resin bath are mounted, is applied.

The filament winding machine is operated at calculated

speeds whilst moving alongside the rotating mandrels to

achieve maximum winding angles.

BEKA Schréder GRP poles are manufactured through

the filament winding process whereby continuous glass

rovings are fed through a polyester resin bath and wound

at an even tension onto a rotating mandrel, resulting in

a mass to resin ratio of 70:30 and making full use of the

tensile strength of the glass filament which is more than

that of steel.

After the winding process has been completed, the glass

filament structure is cured and then removed from the

mandrel for surface preparation.

A base coat of polyester resin that complies with the

requirements of SANS 1749 is applied, thereafter the

cured structure is further machined to receive a final gel

coat that is applied to a uniform thickness of between

250 and 500 microns.

In the mechanical assembly process, the pole is

machined to provide holes for base plate hookbolts,

cable entries, access door openings, as well as any other

details required. Spigot arrangements and surface base

plates, where required, are moulded into the pole and

secured in position with locking screws.

Throughout the manufacturing process, the pole is

subjected to stringent quality checks and tests.



Winding of glass filament Precision quality inspection Machining of cured pole Access door detail