Corus Structural Sections - Engineering Surveyor

Structural Sections to BS4: Part 1: 1993 and BS EN10056: 1999
Out-of-squareness (k + k‘)
The out-of-squareness of the section shall not exceed
the maximum given in Table 2(a).
Straightness (qxx or qyy)
The straightness shall comply with the requirements
given in Table 3.
Table 2 (a) Tolerance on out-of-squareness of
universal beams and columns
Table 3 Tolerance on straightness of universal
beams and columns
Flange width b
mm
Up to and including 110
Greater than 110
Tolerance
mm
1.5
2% of b
Section height h
mm
Greater than 80 up to
and including 180
Tolerance qxx and qyy
on length L
%
0.30 L
(maximum 6.5mm)
Greater than 180 up to
and including 360
0.15 L
Greater than 360
0.1 L
k 1
k 1
h
h
k
k
q yy
b
b
Web off-centre (e)
The mid-thickness of the web shall not deviate from the
mid-width position on the flange by more than the
distance (e) given in Table 2(b).
Table 2 (b) Tolerance on web off-centre of universal
beams and columns
Tolerance on mass
The deviation from the nominal mass of a batch or a
piece shall not exceed ± 4.0%.
The mass deviation is the difference between the actual
mass of the batch or piece and the calculated mass.
Flange Flange width b
Web off-centre
The calculated mass shall be determined using a
thickness t
where e = b1 - b2
2
density of 7850kg/m 3 .
mm
mm
mm
Tolerance on length
t < 40 Up to and including 110
2.5
The sections shall be cut to ordered lengths to
Greater than 110 up to
3.5
and including 325
tolerances of:
Greater than 325
5.0
a) ± 50mm
t ≯ 40 Greater than 110 up to
5.0
or
and including 325
b) -0, +100mm where minimum lengths are required.
Greater than 325
8.0
L represents the longest useable length of the section
assuming that the ends of the section have been cut
square.
b
b 2
L
b
L max.
Corus Construction & Industrial 39