Following rules should be followed while supporting a glass unit in a tubular structure:
1. The structure must be rigid. To give lateral support it must be braced back to the nearest wall or any rigid feature.
2. All glass columns are build up from a fixed point on which whole weight of the column should be taken. If total loads exceeds the permissible limits, counter balance supports should be used to relieve excessive weight.
3. With change in temperature, glass column and tubular structure expands at different rate. Therefore glass unit must be free for vertical movement above the fixed point. Hence, above the fixed point, guides supports should be used to give lateral support.
STRUCTURE TUBES, GALVANISED
For forming the structure, “B” class galvanised tubes, Mild Steel with Epoxy Coated, Stainless Steel 304 & 316 are used in size of 1/2", 1", 1.1/4", 1.1/2" and 2". Cut tubes are available in required length to form a standard size structure. Cut tubes are provided with rubber plug at both the ends.
Tube size NB Inches
|
NB mm
|
External Diameter
|
1/2"
|
15
|
19.5
|
1"
|
25
|
32.5
|
1.1/4"
|
30
|
41.5
|
1.1/2"
|
40
|
48.3
|
2"
|
50
|
60.3
|