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Tolerances

SECTION BENDING

Beam x-x Column x-x

Beam x-x
Column x-x

Beam y-y Column y-y

Beam y-y
Column y-y

RHS x-x RHS y-y SHS

RHS x-x
RHS y-y
SHS

SHS Diamond

SHS Diamond

Solid Round

Solid Round

Solid Square

Solid Square

Flat Washer

Flat Washer

Flat Band

Flat Band

Angle Toe In

Angle Toe In

Angle Toe Out

Angle Toe Out

Vee Pulley Heel In

Vee Pulley
Heel In

Tee Stalk Down/Up

Tee Stalk
Down/Up

Tee Stalk Out

Tee Stalk Out

Tee Stalk In

Tee Stalk In

Tube CHS

Tube CHS

Oval x-x<br/>Oval y-y

Oval x-x
Oval y-y

Channels Toes Out Channels Toes In

Channels Toes Out
Channels Toes In

Channel x-x AXIS

Channel x-x
AXIS

Diameter Tolerance
Up To 500 DIA +/- 2.0mm
500 to 1000 DIA +/- 2.5mm
1000 to 2000 DIA +/- 4.0mm
2000 to 3000 DIA +/- 6.0mm
3000 to 4000 DIA +/- 6.0mm
Over 4000 +/- DIA/1000mm
Max Deviation - L/1000 or 6mm whichever is greater

PRESS BRAKING

Press Braking Tolerances Press Braking Tolerances

PLATE ROLLING

Thin plate cannot hold its shape when cyclinders are laid down. It is therefore necessary to support them.

We will always advise you of different solutions for transport to support plates with the diameter: thickness ratio is too high to support the plates. We have a variety of transport supports and cradles to help.

Plate rolling tolerances (Tighter that N.S.S.S)

Diameter Tolerance
Up To 2000 DIA +/- 6.0mm
2000 to 3000 DIA +/- 8.0mm
3000 to 4000 DIA +/- 10.0mm
Max Deviation - D/500 or 6mm whichever is greater

TEE SPLITTING

Squareness of ends:

Tee Splitting Tolerances

Quality Of Finish

Depending on the size, tees are either split using a shearing process or a flame cutting process.

Shared Tees:

'Sheared edge' smiliar to sheared plate. Additional grinding may be necessary depending on application. Some loss of width in addition to the normal beam manufacturers tolerance.

Flame / Plasma cut tees:

Usually 2/3 mm loss of width per cut. Tees are supplied as cut. When reversing the tees to produce tapered tees the loss of width is compunded and some remedial welding may be necessary to achieve your exact width.

Straightness of tees:

Tees are straightened to BS 4/N.S.S.S tolerances. Finer tolerances can be achieved at cost.

Length tolerance:

Plate Cutting tolerances are +/- 3mm

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