Glazing guide – Palram PALGAR User Manual
Page 24
PALSUN® PALGARD™
Glazing Guide
24
Figure 13. Schematic Details
of PALSUN Glazing inside A
Supporting Frame
4. Directives, Instructions & recommendations for Flat & Curved PALSUN® Glazing:
a. Rabbet Depth:
Depth prepared for glazing
engagement (e) plus half of the
expansion gap (
1
/
2
f). It is the whole
depth prepared in the frame for
glazing installation.
Rabbet depth grows as glazing
width grows.
Table 12 below depicts edge
engagement (e) dimensions
respectively to glazing width.
PALSUN edge engagement is larger
than glass because of its higher
flexibility & deflection, which might
generate glazing fallout through
shortening due to excess deflection.
b. Thermal Expansion Gap:
Next Table 13 exhibits
recommended gap for thermal
expansion according to glazing pane
length. Half that gap is to be
provided all around the glazing but
it really is nil at the bottom and full
at the top. Gap required is also wider
due to polycarbonate higher thermal
expansion coefficient.
Table 12. PALSUN Glazing Rabbet Depth Width according to Width & Thickness of PALSUN Glazing
(a) PALSUN Glazing width (t) Glazing Thickness (e+
1
/
2
f) Rabbet Depth
mm in.
mm
in.
mm
in.
Up to 700
Up to 28
3
1
/
8
701 - 900
28 – 35
4
5
/
32
901 – 1100
35 – 43
5
13
/
64
15 - 20
39
/
64
–
13
/
16
1101 – 1300
43 – 51
6
¼
1301 – 1500
51 – 59
8
5
/
16
1501 – 1700
59 – 67
10
13
/
32
1701 - 2000
67 - 79
12
½
20 - 30
13
/
16
– 1
¼
Table 13. Thermal Expansion Gap for PALSUN Glazing according to Length
mm 300-700 701-1000
1001-1300 1301-1700 1701-2000 2001-2500 2501-3000
PALSUN Glazing
Length (b)
ft. 1-2.35
2.35-3.35
3.35-4.35 4.35-5.70 5.7-6.70 6.70-8.20 8.20-10
mm
2
3 4 5 6 7 8
Expansion Gap (f)
in.
5
/
64
1
/
8
5
/
32
13
/
64
¼
9
/
32
5
/
16
Note: As a rule of thumb, an inclusive gap of 1mm is required for every 300-400mm of sheet length. Half this gap should
be left at both width sides, while a whole gap provided at top length side and nil at the bottom.
Engagement
k. e +
½
f = Rabbet Depth
Correct Term’s Name
Rabbet (not Rebate)