Installation Guide

CURVED GLAZING SHEET THICKNESS
LEXAN
™
THERMOCLEAR
™
MULTIWALL POLYCARBONATE SHEET, 02-201638 TECHNICAL MANUAL
LEXAN THERMOCLEAR
sheet thickness
Min. Radius
(mm)
6 900
8 1200
10 1500
16 2400
radius 'R'
span
centre to centre
distance between
curved support/glazing
profiles
LEXAN THERMOCLEAR sheet can be successfully cold-curved
over curved support glazing profiles, to suit many glazing
applications, e.g. domes, roof-lights, etc. Providing the
radius is not below the minimum recommended value,
then the introduced stress by cold-curving will not have
any adverse effect upon the mechanical performance of
the sheet. Sheets must always be bent longitudinally, never
across the width of the sheet.
The loading characteristics given in Table 22 are based
upon curved glazing applications clamped on all four ed-
ges. The Table shows linear buckling load values, (calculated
with a safety factor of 2.0), against installation radii for
different sheet widths.
Sheet length ‘L’ needs to be greater than sheet width ‘W’ to
facilitate curvature; in practice, a ratio of 1:2 or less is never
contemplated because of the practicalities of installation
geometry.
Note on cold curved applications:
Although the LEXAN THERMOCLEAR-PLUS 9 Wall sheet can be cold
curved in the thicknesses 16-18 and 20mm at a radius of 150 times
the thickness of the sheet, there might appear a optical distortion
of the internal layers. This optical distortion will have no negative
influence on the mechanical performance of the product provided
that the guidelines for cold curved applications in this data sheet
are correctly followed.
Table 21: Minimum radius values
Figure 25