Dimensional Tolerance

 

1) ASTM

Cross section

Section
nominal
size, in.

Depth, in
( A ) Over
Under

Flange width
in. (B)
Over Under

Flanges out
of
Square, max,
in. (T+T')

Web off
centre, max
in. (E)

Maximum depth
(C) at cross
section, over, in.

Application

Up to 12, incl

1/8

1/8

1/4

3/16

1/4

3/16

1/4

Over 12

1/8

1/8

1/4

3/16

5/16

3/16

1/4


Ends out-of-square

Tolerance

Application

1/64

in. / in. of depth, or of flange width if it is greater than the depth.

 


Straightness

Tolerance

Tolerance

Application

Camber and sweep

When certain section (b) with a flange
width approximatel equal to depth
are specified on order as columns.

Length of 45 ft and under

 

Length over 45 ft

 

1/8 in. x (number of feet of total

length (a) / 10)

1/8 in. x (number of feet of total

     length/10) but not over 3/8 in

3/8 in.+[1/8 in.X(number of feet

      of total length-45]/10)]

 

 

 

(a) Sections with a flange width less than 6 in., tolerance for sweep = 1/8 in. x (number of feet of total length 5)
(b) Applies only to 8 in. deep sections 31Lb/ft and havier.
10 in. deep sections 49Lb/ft and havier.
12 in. deep sections 65Lb/ft and havier.
14 in. deep sections 90Lb/ft and havier.
If other sections are specified on the order as colums, the tolerance will be subject to negotiation with the manufacturer.

Length

W and HP Shapes

Variations from Specified Length for Lengths Given, in.

30 ft and under

Over 30 ft

Over

Under

Over

Under

 Beams 24 in. and under in nominal depth

3/8

3/8

 3/8 plus 1/16 for each additional 5 ft or fraction thereof

3/8

Beams over 24 in. in nominal depth and all columns

1/2

1/2

1/2 plus 1/16 for each additional 5 ft or fraction thereof

1/2

For HP shapes or W shapes when used as bearing piles, the length tolerance is plus 5 in. and minus 0 in. This length tolerance also applies to steel sheel piles.

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