BS 5975 2019 Extract - Flipbook - Page 67
BRITISH STANDARD
BS 5975:2019
it to accept or reject the designer's response. When there is an impasse over particular queries
the PC's TWC, after consultation with the client, should confirm whether the designer and design
checker should discuss the outstanding query(ies) and how these discussions should be recorded.
The design checker should confirm all queries have been resolved and the designer should issue
the revised design output in order that the design and design check certificate can be signed by the
design checker.
13.9
Alterations
13.9.1
Changes in the requirements of the design brief should be recorded in writing, with reference to the
original design brief, and issued to the designer. The designer should check the proposals against the
certified design and incorporate the requirement for these alterations into the design and drawings
(see also 20.2). If there is no significant change to the design, the designer should confirm the
acceptability of the proposals to the appropriate TWC.
13.9.2
Any alterations to the temporary works, proposed by the site team, should be referred to the
PC's TWC or TWC as appropriate, who should contact the TWD for incorporation of the change
into the design.
13.9.3
Where the designer considers that the alteration is significant, the alteration should be referred to
the design checker. Any revised design or design check documentation should be recertified when
considered appropriate by the PC's TWC or TWC as appropriate.
13.10
Standard solutions
13.10.1
An organization might publish technical data in the form of arrangements of temporary works
of their equipment based on certain conditions of use; these arrangements, known as standard
solutions and often presented in a tabular or readily assimilated format, should relate to the
organization's products only. The organization should carry out the structural design calculations and
verify the arrangements with design check certificates.
NOTE Provided the equipment is erected, used and operated within the limitations placed in the standard
solution, a TWC does not need to further verify the actual design calculations of the standard solution (see design
checks at 13.7 and Table 2).
13.10.2
For each standard solution the organization should identify the limitations of their use and of their
design responsibility.
NOTE For example, a standard solution for a proprietary soffit system might not include design of the
foundations, or the method by which top restraint is obtained for lateral stability. Equally it might not
include design of any face contact material, although the standard solution might assume a certain grade of
material is used.
13.10.3
Users of standard solutions should ensure that the:
a)
solution assumes that the equipment specified is used, without substitutions;
b)
concept is acceptable for the location;
c)
conditions of use and limitations on use are within the specified limits;
NOTE
For trench support systems this includes verification that the ground conditions (including
groundwater level) are as specified for the equipment
d)
assembly is erected to the expected tolerances;
e)
solution is within the experience of the workforce and its supervision;
f)
equipment is not damaged and does not show signs of excessive wear;
g)
method of loading the system is as stated in the standard solution;
© THE BRITISH STANDARDS INSTITUTION 2019 3 ALL RIGHTS RESERVED#59
