Palram SUNLIT - Manual (Page 14)

12
12
Maximum Recommended Distances between Support Purlins
For Curved Roofing/Cladding, According to Curvature Radius and Load.
Structure Thickness Sheet curvature radius
Recommended (center-to-center) Distance between Supporting arches according
to wind/Snow loads below
50 Kg/m² 10 psf 80 Kg/m² 16 psf 100 Kg/m² 20 psf 120 Kg/m² 24.6 psf
mm mm Inch mm Inch mm Inch mm Inch mm Inch
Twin Wall
6
1050 41 2000 79 1730 68 1420 56 1020 40
1500 60 1570 62 1570 62 1200 48 1200 48
1800 72 1420 56 1420 56 1150 46 1150 46
2200 86 1380 55 1380 55 1150 46 1150 46
2800 110 1260 50 1260 50 1100 44 1100 444
4000 158 1150 46 900 36 850 34 780 31
6000 236 900 36 800 32 650 26 500 20
8
1400 55 1570 62 1570 62 1570 62 1570 62
1800 72 1880 74 1420 56 1420 56 1420 56
2200 86 1730 68 1380 55 1380 55 1380 55
2800 110 1470 58 1470 58 1250 50 1100 43
4000 158 1250 50 1150 46 1050 40 900 32
6000 236 1150 46 1000 40 850 34 650 26
10
1750 69 1885 74 1885 74 1885 74 1885 74
2200 88 1725 68 1725 68 1725 68 1725 68
2800 110 1470 58 1470 58 1250 50 1100 43
4000 158 1250 50 1150 46 1050 40 900 32
6000 236 1150 46 1000 40 850 34 650 26
Triple Wall
8
1760 70 1420 55 1420 55 1380 53 1380 56
2200 86 1380 53 1380 53 1380 53 1250 49
2800 110 1380 53 1380 53 1250 49 1070 42
4000 158 1150 46 1050 42 1050 42 750 30
6000 236 1100 44 960 38 825 33 625 25
10
1800 72 1885 74 1885 74 1885 74 1885 74
2200 86 1725 68 1725 68 1725 68 1725 68
2800 110 1750 69 1750 69 1750 69 1465 58
4600 158 1570 62 1570 62 1260 50 1260 50
6000 236 1260 50 1180 47 1075 42 900 36
16
2800 110 2100 83 2050 81 2000 79 1950 77
4000 158 1750 69 1700 67 1650 65 1600 63
6000 236 1600 63 1400 56 1250 50 1150 46
X-Lite
16
3000 118 2125 84 2075 81 2025 79 1975 77
4000 158 1800 71 1750 69 1700 67 1650 65
6000 236 1600 63 1400 56 1250 50 1150 46
25
5000 197 1300 90 2050 80 1770 70 1500 59
6000 237 2100 69 1850 73 1570 62 1300 51
32
6400 252 2200 86 2050 80 1770 67 1500 59
8000 315 2100 82 1950 76 1670 65 1400 55
35
7000 276 2200 86 2050 80 1770 67 1500 59
8200 323 2100 82 1950 76 1670 65 1400 55
Notes:
1. SUNLITE 4mm twin-wall is not recommended for constructive applications and is therefor excluded.
2. The specified spans are based on L/20 deflection (5%) at the specific span and load, using continuous multi-span supports. The values refer to mid-spans.
Edge-spans (lower & upper ends) should be approx. 15-20% smaller.
3. Spans depicted in all but the largest radii (6.00-8.00 m) derive from division of a full 180º barrel vault of the specific radius into equal size sectors. For instance - an
arch with 1.10m radius is divided into 2 equal parts of 1.73 m length. An arch of 1.50 m radius is divided into 3 parts each 1.57 m long, and so on)
4. Curved SUNLITE is more rigid and allows for a much wider span than in flat installation, especially in smaller radii. Rigidity and strength are reduced as the radius is
increased (for same type of panel). A lightly curved panel behaves almost the same as a flat one.