Structure and Support

  • Structure and Support

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

    SUPPORT OF COLUMN

    Glass plants and pipeline 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 plant 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 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

    Available cut lengths

    Structure

     

    NB (mm)

     

     

     

     Dimension

    15*

    25*

    30*

    40*

    50*

    For Vertical installation

    For Vertical installation

    2500

    -

    2500

    -

    -

    -

    3000

    -

    3000

    3000

    -

    -

    3500

    -

    3500

    3500

    -

    -

    4000

    -

    -

    4000

    -

    -

    6000

    -

    6000

    6000

    6000

    6000

    For Frames

    For Frames

    400

    -

    365

    355

    345

    335

    500

    -

    465

    455

    445

    435

    600

    -

    565

    555

    545

    535

    800

    -

    765

    755

    745

    735

    1000

    -

    965

    955

    945

    935

    1200

    -

    1165

    1155

    1145

    1135

    1500

    -

    1465

    1455

    1445

    1435

    For Frames

    For Frames

    400

    435

    445

    445

    455

    465

    500

    535

    545

    545

    555

    565

    600

    635

    645

    645

    655

    665

    800

    835

    845

    845

    855

    865

    1000

    1035

    1045

    1045

    1055

    1065

    1200

    1235

    1245

    1245

    1255

    1265

    1500

    1535

    1545

    1545

    1555

    1565

    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

    NB

    TUBE DIA

    ID

    OD

    d

    25

    32.5

    35

    45

    1/2"

    30

    42.5

    45

    55

    1/2"

    40

    48.3

    51

    61

    1/2"

    50

    60.3

    63

    73

    1/2"

    STRUCTURE FITTINGS - BASE

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

    Cat.Ref.

    NB

    D

    H

    PCD

     BS25*

    25

    150

    75

    110

    4 x 14Ø

     BS30*

    30

    150

    75

    110

    4 x 14Ø

     BS40

    40

    150

    75

    110

    4 x 14Ø

     BS50

    50

    175

    75

    125

    4 x 14Ø

    STRUCTURE FITTINGS - COUPLER

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

    Cat.Ref.

    NB

    H

    H1

     CL25

    25

    150

    200

     CL30

    30

    150

    200

     CL40

    40

    150

    200

     CL50

    50

    150

    200

    STRUCTURE FITTINGS - BEND

    These are used to build frames on vertical tubes.

    Cat.Ref.

    NB

    H

    L

     BN25*

    25

    50

    55

     BN30*

    30

    65

    70

     BN40

    40

    70

    80

     BN50

    50

    85

    95

    STRUCTURE FITTINGS - TEE

    These are used to build frames on vertical tubes.

    Cat.Ref.

    NB

    H

    L

     T25*

    25

    50

    55

     T30*

    30

    65

    70

     T40

    40

    70

    80

     T50

    50

    85

    95

    STRUCTURE FITTINGS -DOUBLE BEND

    Cat.Ref.

    NB

    H

    L

     BN25

    25

    50

    55

     BN30

    30

    65

    70

     BN40

    40

    70

    80

    BN50

    50

    85

    95

    STRUCTURE FITTINGS - DOUBLE TEE

    Cat.Ref.

    NB

    H

    L

     DT25

    25

    50

    55

     DT30

    30

    65

    70

     DT40

    40

    70

    80

     DT50

    50

    85

    95

    STRUCTURE FITTINGS - EQUAL BRACKET

    Cat.Ref.

    NB

    h

    L

    L1

     EBT25*

    25

    40

    65

    50

     EBT30*

    30

    52

    75

    60

     EBT40

    40

    62

    85

    60

     EBT50

    50

    72

    95

    60

    STRUCTURE FITTINGS - UNEQUAL BRACKET

    Cat.Ref.

    NB

    NB1

    h

    L

    L1

     UBT25/15*

    25

    15

    35

    65

    50

     UBT30/15*

    30

    15

    40

    75

    60

     UBT40/25

    40

    25

    50

    85

    60

     UBT50/25

    50

    25

    55

    95

    60

    STRUCTURE FITTINGS - CROSS

    Cat.Ref.

    NB

    H

    L

     X25

    25

    50

    45

     X30

    30

    65

    55

     X40

    40

    65

    70

     X50

    50

    65

    85

    STRUCTURE FITTINGS - SUPPORT

    Cat.Ref.

    NB

    H

    L

    d

     SPT15*

    15

    40

    35

    13

     SPT25*

    25

    55

    50

    13

     SPT30*

    30

    55

    57

    13

     SPT40

    40

    55

    62

    13

     SPT50

    50

    55

    67

    13

    STRUCTURE FITTINGS - PLUGS

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

    Cat.Ref.

    NB

     PLUG15

    15

     PLUG25

    25

     PLUG30

    30

     PLUG40

    40

     PLUG59

    50

    STRUCTURE FITTINGS - STUDS

    These are used as screwed rods with supports.

    Cat.Ref.

    d

    L

    STUD5/16-150

    5/16"

    150

     STUD3/8-150

    3/8"

    150

     STUD1/2-200

    1/2"

    200

    STRUCTURE DIMENSIONS

    For columns

    DN

    Recommended tube size NB (mm)

    Minimum Structure size Depth X Width

    80

    25

    500 x 500

    100

    25

    500 x 500

    150

    25,30

    600 x 600

    225

    30

    800 x 800

    300

    30

    800 x 800

    400

    30

    1000 x 1000

    450

    30,40

    1000 x 1000

    600

    40,50

    1200 x 1200

    For vessels (IN HEATING BATHS)

    Size (Liters)

    Recommended tube size NB (mm)

    Minimum Structure size Depth X Width

    20

    25

    500 x 600

    50

    25

    600 x 800

    100

    25,30

    800 x 1000

    200

    30

    800 x 1200

    For vessels (IN HEATING MENTLES)

    Size (Litres)

    Recommended tube size NB (mm)

    Minimum Structure size Depth X Width

    20

    25

    400 x 600

    50

    25

    600 x 800

    100

    25,30

    800 x 800

    200

    30

    800 x 1000

    For vessels (IN VESSEL HOLDERS)

    Size (Litres)

    Recommended tube size NB (mm)

    Minimum Structure size Depth X Width

    20

    25

    500 x 600

    50

    25

    600 x 800

    100

    25,30

    1000 x 1000

    200

    30

    1000 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.

    Cat. Ref.

    PCD

    L1

    L

    H

     FCSH225

    310

    1000

    800

    75

     FCSH300

    395

    1000

    800

    75

     FCSH400

    495

    1200

    1000

    75

     FCSH450

    585

    1200

    1000

    100

     FCSH600

    710

    1400

    1200

    100

    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.