Structure and Support

Glass plants are normally supported in a tubular structure formed of galvanised steel tubes. This type of structure is proved robust and flexible over many years.

SUPPORT OF COLUMN

SUPPORT OF COLUMN

Glass plants and pipelines should be supported correctly. To prevent inducing undesirable stresses in the glass, support should be rigid. When supported, glass should be in compression.

Generally, glass plants and equipment are supported in a rectangular tubular structure. This structure is formed of galvanised mild steel tubing with the cast iron fittings which are described in this catalogue. This type of structure provides enough flexibility for future modifications and is strong enough to support a glass unit.

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 InchesNB mmExternal Diameter
 1/2″1519.5
 1″2532.5
 1.1/4″3041.5
 1.1/2″4048.3
 2″5060.3

Available cut lengths

Structure NB (mm)   
 Dimension15*25*30*40*50*
For Vertical installation
25002500
300030003000
350035003500
40004000
60006000600060006000
Glass units Structure

For Frames

For Frames
400365355345335
500465455445435
600565555545535
800765755745735
1000965955945935
12001165115511451135
15001465145514451435
For Frames
400435445445455465
500535545545555565
600635645645655665
800835845845855865
100010351045104510551065
120012351245124512551265
150015351545154515551565

STRUCTURE FITTINGS

Following structure fitting are available to use with galvanised tubes in order to form a tubular structure for a glass plant. These fitting are made of Cast iron. Also available in Stainless Steel 304 & 316 and are suitable to the galvanised tubes described earlier. These slidable fittings are provided with grub screws to fix it at required position on a galvanised tube. These fittings are specially made to construct a tubular structure which provides enough flexibility for future modifications without involving any hammering and welding.

STRUCTURE FITTINGS – GENERAL DATA

STRUCTURE FITTINGS
NBTUBE DIAIDODd
2532.535451/2″
3042.545551/2″
4048.351611/2″
5060.363731/2″

STRUCTURE FITTINGS – BASE

These are to be used with vertical tubes. Holes are provided for foundation.

base 1
Cat.Ref.NBDHPCD
 BS25*25150751104 x 14Ø
 BS30*30150751104 x 14Ø
 BS4040150751104 x 14Ø
 BS5050175751254 x 14Ø

STRUCTURE FITTINGS – COUPLER

These are generally used to couple the vertical tubes where more length is require.

STRUCTURE FITTINGS - COUPLER
Cat.Ref.NBHH1
 CL2525150200
 CL3030150200
 CL4040150200
 CL5050150200

STRUCTURE FITTINGS – BEND

bb1495fe 8c18 47fb aad9 5890d687badc

These are used to build frames on vertical tubes.

Cat.Ref.NBHL
 BN25*255055
 BN30*306570
 BN40407080
 BN50508595

STRUCTURE FITTINGS – TEE

These are used to build frames on vertical tubes.

STRUCTURE FITTINGS - TEE
Cat.Ref.NBHL
 T25*255055
 T30*306570
 T40407080
 T50508595

STRUCTURE FITTINGS – DOUBLE BEND

STRUCTURE FITTINGS - TEE
Cat.Ref.NBHL
 BN25255055
 BN30306570
 BN40407080
BN50508595

STRUCTURE FITTINGS – DOUBLE TEE

STRUCTURE FITTINGS - DOUBLE TEE
Cat.Ref.NBHL
 DT25255055
 DT30306570
 DT40407080
 DT50508595

STRUCTURE FITTINGS – EQUAL BRACKET

STRUCTURE FITTINGS - EQUAL BRACKET
Cat.Ref.NBhLL1
 EBT25*25406550
 EBT30*30527560
 EBT4040628560
 EBT5050729560

STRUCTURE FITTINGS – UNEQUAL BRACKET

STRUCTURE FITTINGS - UNEQUAL BRACKET
Cat.Ref.NBNB1hLL1
 UBT25/15*2515356550
 UBT30/15*3015407560
 UBT40/254025508560
 UBT50/255025559560

STRUCTURE FITTINGS – CROSS

STRUCTURE FITTINGS - CROSS
Cat.Ref.NBHL
 X25255045
 X30306555
 X40406570
 X50506585

STRUCTURE FITTINGS – SUPPORT

STRUCTURE FITTINGS - SUPPORT

Cat.Ref.NBHLd
 SPT15*15403513
 SPT25*25555013
 SPT30*30555713
 SPT4040556213
 SPT5050556713

STRUCTURE FITTINGS – PLUGS

These are used to plug the open ends of galvanised tubes.

STRUCTURE FITTINGS - PLUGS
Cat.Ref.NB
 PLUG1515
 PLUG2525
 PLUG3030
 PLUG4040
 PLUG5950

STRUCTURE FITTINGS – STUDS

These are used as screwed rods with supports.

STRUCTURE FITTINGS - STUDS
Cat.Ref.dL
STUD5/16-1505/16″150
 STUD3/8-1503/8″150
 STUD1/2-2001/2″200

STRUCTURE DIMENSIONS

For columns

STRUCTURE DIMENSIONS
DNRecommended tube size NB (mm)Minimum Structure size Depth X Width
8025500 x 500
10025500 x 500
15025,30600 x 600
22530800 x 800
30030800 x 800
400301000 x 1000
45030,401000 x 1000
60040,501200 x 1200

For vessels (IN HEATING BATHS)

For vessels (IN HEATING BATHS)
Size (Liters)Recommended tube size NB (mm)Minimum Structure size Depth X Width
2025500 x 600
5025600 x 800
10025,30800 x 1000
20030800 x 1200

For vessels (IN HEATING MANTLES)

For vessels (IN HEATING MENTLES)
Size (Litres)Recommended tube size NB (mm)Minimum Structure size Depth X Width
2025400 x 600
5025600 x 800
10025,30800 x 800
20030800 x 1000

For vessels (IN VESSEL HOLDERS)

For vessels (IN VESSEL HOLDERS)
Size (Litres)Recommended tube size NB (mm)Minimum Structure size Depth X Width
2025500 x 600
5025600 x 800
10025,301000 x 1000
200301000 x 1000

COLUMN BASE SUPPORT FRAMES

These channel frames are used as fixed support in erection of columns. These are supplied with full threaded jacking rods and U bolts.

column base 1
Cat. Ref.PCDL1LH
 FCSH225310100080075
 FCSH300395100080075
 FCSH4004951200100075
 FCSH45058512001000100
 FCSH60071014001200100

GROUTING OF BASE

1. Take one Cast Iron BASE and four foundation Bolts, each with 2 nuts.
2. Fit the bolts in BASE so That base is raised upto 150mm from head of bolts.
3. Put this assembly on the floor and prepare a rough surface for proper bonding of grouting.
4. Make a concrete block over the bolts of about 200 x 200mm upto the base of BASE i.e. 150mm high.
5. Prepare separate block for each BASE instead of making one big common block. for all

BASES.ASSEMBLING OF STRUCTURE

1. Mark the position of required fittings on all the vertical tubes, slide them in correct sequence and lightly tighten.
2. Assemble one side frame of the structure by adding the cross tubes between two vertical tubes.
3. Assemble other side frame of the structure by adding the cross tubes between other two vertical tubes.
4. Build up the cross tubes in one side frame and tighten lightly.
5. Add the other side frame on it and tighten all the fittings firmly.
6. Hoist the structure and brace it to some existing rigid feature.
7.Grout the foundation bolts and fix the structure bases with that.
8. Adjust bracing to obtain a correct plumb in structure.
9. Adjust the horizontal frames in correct level.
10. Assemble the support tubes at their positions.