Volume-IF - JantERmantER

DCPL-K4A02
4.1.2 Strength Test
The structure or structural member under consideration shall be subjected,
in addition to its actual dead load, to a test load equal to the sum of the
dead load and twice the specified superimposed load, and this load shall be
maintained for 24 hours.
In the case of wind load, a load corresponding to twice the specified wind
load shall be applied and maintained for 24 hours, either with or without the
vertical test load for more severe condition in the member under
consideration or the structure as a whole. Complete tests under both
conditions may be necessary to verify the strength of the structure. The
structure shall be deemed to have adequate strength if, during the test, no
part fails and if on removal of the test load, the structure shows a recovery
of at least 20 per cent of the maximum deflection or strain recorded during
the 24 hours under load.
4.1.3 Structure of same design
Where several structures are built to the same design and it is considered
unnecessary to test all of them, one structure, as a prototype, shall be fully
tested, as described in previous Sub-clauses, but in addition, during the
first application of the test load, particular note shall be taken of the strain or
deflection when the test load 1.5 times the specified superimposed load has
been maintained for 24 hours. This information is required as a basis of
comparison in any check test carried out on samples of the structure.
When a structure of the same type is selected for a check test, it shall be
subjected, in addition to its actual dead load, to a superimposed test load,
equal to 1.5 time the specified live load, in a manner and to an extent
prescribed by the Engineer. This load shall be maintained for 24 hours,
during which time, the maximum deflection shall be recorded. The check
test shall be considered satisfactory, provided that the maximum strain or
deflection recorded in the check test does not exceed by more than 20% of
the maximum strain or deflection recorded at similar load in the test on
the prototype.
4.1.4 Repair for subsequent test and use after strength tests
4.2.0 Tolerances
An actual structure which has passed the "Strength Test" as specified in
Sub-clause 4.1.2 hereinbefore and is subsequently to be erected for use,
shall be considered satisfactory for use after it has been strengthened by
replacing any distorted members and has subsequently satisfied the
'Stiffness Test' as specified in Sub-clause 4.1.1. hereinbefore.
Some variation is to be expected in the finished dimensions of structural steel
frames. Unless otherwise specified, such variations are deemed to be
within the limits of good practice when they are not in excess of the
cumulative effect of detailed erection clearances, fabricating tolerances for
the finished parts and the rolling tolerances for the profile dimensions
(PCA.775.S034sca5) V.II-D2/S-V : 11