Palram SUNLIT - Manual (Page 7)

SUNLITE® Technical Guide
5
5
Maximum Recommended Distances Between Centers- Shorter Spans (width)
Under different ratios and loads for four sides clamped / framed flat glazing.
Structure
Thickness
Wind/snow
uniform loads
Distance between centers (shorter span) according to ratio a:b
Ratio 1:1 Ratio 1.5:1 Ratio > 1.5:1
mm Kg/m² psf mm Inch mm Inch mm Inch
Twin Wall
6
50 10 900 36 700 28 500 20
80 16 700 28 500 20 350 14
100 20 500 20 400 16 - -
120 25 400 16 300 12 - -
8
50 10 1150 45 900 36 600 24
80 16 1000 40 800 28 480 19
100 20 900 36 650 22 450 18
120 25 750 30 600 20 - -
10
50 10 1250 50 1000 40 750 30
80 16 1200 47 900 30 550 22
100 20 110 43 800 24 500 20
120 25 950 37 700 21 450 18
Triple Wall
8
50 10 1200 47 950 38 650 26
80 16 1050 42 750 29 510 20
100 20 950 37 650 22 470 18
120 25 900 38 650 22 480 19
10
50 10 1275 51 1050 41 800 32
80 16 1225 49 900 32 600 24
100 20 1125 44 750 26 550 22
120 25 900 38 650 22 480 19
16
50 10 1500 59 1200 47 1100 43
80 16 1300 52 1100 43 1000 41
100 20 1200 47 1050 41 900 36
120 25 1100 43 950 37 850 33
X-Lite
16
50 10 1550 61 1250 49 1150 45
80 16 1350 53 1150 45 1050 41
100 20 1240 49 1080 42 950 37
120 25 1130 44 980 38 900 35
25
50 10 2100 83 1700 67 1400 55
80 16 1950 76 1600 63 1650 53
100 20 1800 70 1500 59 1300 51
120 25 1650 65 1400 55 1250 49
32
50 10 2100 83 1850 73 1500 59
80 16 2100 83 1700 67 1400 55
100 20 2000 78 1600 63 1350 53
120 25 1850 73 1500 59 1300 51
35
50 10 2100 83 1875 74 1525 60
80 16 2100 83 1725 68 1425 56
100 20 2025 79 1652 64 1375 54
120 25 1875 74 1525 60 1325 52
Notes:
1. SUNLITE 4mm twin-wall is not recommended for constructive applications and is therefor excluded.
2. Data in table according to load tests on typical multi-wall sheets and additional extrapolations.
3. Recommended spans are calculated on the basis of 1/20 maximum deflection (5%) of sheet’s width (In this case crosswise, perpendicular to the rib channels).
4. A SUNLITE glazing sheet may withstand even higher loads without buckling, however, excessive lateral shortening, created by higher deflection, may cause the
edges to slip out of their supports (pop-out).