Ladders. Ladders shall be manufactured i n accordance with the d e t a i l s and general
arrangements shown on the drawings.
Ladders shall be supplied complete with a l l the necessary bolts, nuts and washers
f o r f i x i n g .
0 en Grid Floors
&n-CjFTd-s51 covers and f l o o r panel s shall be manufactured by an approved firm
specializing i n such work, They shall be pressure locked or welded (or both). A l l
span-bars shall have a thickness, depth and spacing such that the deflection of any
bar under design load conditions does not exceed 1/200th o f the clear span, or
10 mm, whichever i s the lesser.
Flooring s h a l l be made up i n panels of sizes that conform to the dimensions given
on the drawings. The panels shall be supplied prefabricated with cut-outs that conform
to the d e t a i l s given. Unless authorized to do so, the Contractor s h a l l not cut
or weld open g r i d f l o o r panels on Site.
Floor l a t e Floors. Floorplate s h a l l be as specified and shall have an approved
EST&-j%X"FCifting key holes shall be provided as specified.
Protective Treatment. A l l steel surfaces that are t o be painted, or otherwise
F G i � & T m E - f S F e p a r e d and treated i n accordance with SABS 1200 HC. Where no
corrosion prevention system i s specified, open g r i d f l o o r i n g shall be dipped i n
black bitumen.
ERECTION AND INSTALLATION
General. The Contractor shall, before commencing erection of steelwork, submit
dG�CiTTX of the method of erection t o the Engineer f o r his information and comment.
Such comment w i l l not relieve the Contractor of his sole responsibility f o r the
safety and adequacy of the erection methods used.
A l l items shall be so stored, transported, handled and erected that they are not
subject to undue stress or damage.
fSs.Kaaf{,e-...Dt du - Erectlo!. During erection, items shall be so fixed and so secured as
ovi'fi-6E-for a1 1 erection loads and conditions.
Before the Contractor commences erection of steelwork on Site, he
that the setting-out and t h e l e v e l s of holding-down bolts and of
concrete foundations, beam faces, columns, etc. are i n accordance with the
drawings provided and he s h a l l report any discrepancies t o the Engineer immedi
ate1 y.
be aligned as soon as possible a f t e r erection.
with the approval of the Engineer.
Grouting. Unless otherwise required i n terms of the project specification, grouting
of-Sases or HD bolts. or both. as amlicable. f o r handrails. ladders. framina and
of cutting, burning and reaming may be employed to
floors shall be carried out by the contractor i n accordance'with the.
_R_ep airsJo Paint and Site Paintin . Repairs to paintwork and Site pai
c a r r i w GT. i n a c c o r a G i i T t d S 1200 HC.
TOLERANCES
FABRICATION AND ASSEMBLY TOLERANCE
General
Exceptwhere otherwise required i n terms o f 6.1.2 and 6.1.3, the fabr
assembly tolerance on a l l dimensions shall be f 2 mm .
Holes f o r connections shall be aliqned as specified i n 5.2.3.
peci f i cation.
t i n g shall be
cation and
A l l calculated permissible tolerances shall'be rounded up t o the nearest m i l l i -
metre.
Rolled Sections. The tolerances on cross-sectional dimensions of r o l l e d sections
a f t e r fafi7TcEEon shall be as specified i n the l a t e s t issue of the South African
I n s t i t u t e of Steel Construction's structural steel tab1 es.
Other Tolera~nc~. The tolerances on a l l dimensions (other than r o l l e d sections),
accuracy of erection and location of holding-down bolts shall be as given below:
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