Page 11 - TBIS_79010-2019_(EN)_1nd

TBIS 79010:2019
4. Safety requirements

4.1 General
4.1.1 Structure requirement

4.1.1.1 Definition of brake tests

Brake tests to which accuracy requirements apply, as in 4.1.1.4, are those specified
in 4.2.2.3 to 4.2.2.6 inclusive.

4.1.1.2 Definition of strength tests

Strength test to which accuracy requirements apply, as in 4.1.1.4, are those involving
static, impact or fatigue loading.

4.1.1.3 Numbers and condition of specimens for the strength tests
General, for static, impact and fatigue tests, each test shall be conducted on a new

test sample, but if only one sample is available, it is permissible to conduct all of
these tests on the same sample with the sequence of testing being fatigue, static and
impact.

When more than one test is conducted on the same sample, the test sequence shall
be clearly recorded in the test report or record of testing.

NOTE It ought to be noted that if more than one test is conducted on the same sample,

earlier tests can influence the results of subsequent tests. Also, if a sample fails when it has
been subjected to more than one test, a direct comparison with single testing is not
possible.

In all strength tests, specimens shall be in the fully-finished condition.

4.1.1.4 Accuracy tolerances of test conditions for brake tests and strength tests

Unless stated otherwise, accuracy tolerances based on the nominal values shall be
as follows:

Forces and torques 0/+5 %
Masses and weights ±1 %
Dimensions ±1 mm

Angles ±1°
Time duration ±5 s
Temperatures ±2 °C

Pressures ±5 %

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