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21
Sign & Display Product Guide
SIGN CONSTRUCTION
The adhererable sign face can be applied to either face of GRP Panels.
STIFFENING AND RIVETING
Support channels may be secured to the back of the panels by the
following methods:
•
BOLLHOFF non-penetrating rivet system.
•
Adhesives using 3M 4980 VHB Tape or 3M Scotchweld DP 460.
SUPPORT RAIL RECOMMENDATIONS
GRP Sheet has good tensile strength and impact resistance. The nature of
GRP is that it is more flexible than Aluminium. To obtain the best use and
service life it is recommended that the support rails, which provide
stiffening, are fixed in accordance with
TABLE 1
.
TABLE 1
SUPPORT RAILS SHOULD BE FIXED A MINIMUM OF 30MM FROM THE RUNNING EDGE OF
THE SIGN. IF A SHEET JOINING SECTION IS TO BE FITTED BY MEANS OF RIVETING, THEN
THE RIVET SHOULD NOT BE WITHIN 15MM OF THE SHEET EDGE.
GRP Sheet is available in 3.2mm thickness. When fixing aluminium
support rails by means of a non-penetrating rivet system, a maximum rivet
spacing of 150mm should be adopted.
Note:
GRP Sheet signs will flex more than Aluminium signs of the same
size until they are mounted on posts, hence it is advisable to store
completed signs flat or with support rails vertical to prevent possible
damage to the sign facings.
BOLLHOFF / HENROB RIVET RECOMMENDATIONS
Due to the different properties of the Aluminium alloy and GRP sign plate
used for signs, it is necessary to change rivets for each material thickness
as per
TABLE 2
(page 20).
•
DO NOT rivet within 15mm from the edge of the GRP sign plate.
•
Riveting pressure may need to be adjusted to suit the ductility of
the materials being riveted.
•
Should not be necessary to change Upsetting Die or Nose Assembly.
0.50m
2
400mm
0.75m
3
325mm
0.90m
3
400mm
1.00m
4
300mm
1.20m
4
366mm
1.50m
5
350mm
1.75m
6
380mm
2.00m
7
317mm
2.25m
8
340mm
2.44m
8
335mm
SIGN SECTION HEIGHT
NO. OF RAILS
MAX. RAIL SPACING