BS 5975-1:2024 - Book - Page 61
BRITISH STANDARD
BS 5975‑1:2024
Annex A (informative)
Examples of design brief contents
A.1 Design brief for a motorway bridge
A design brief for a motorway bridge might include the following elements:
a)
schedule of drawings of the permanent works;
b)
programme for the construction of the permanent structure;
c)
plan of ground and foundation areas beneath and adjacent to the area to be supported, showing:
1)
contours and/or cross‑sections showing ground level variations; and
2)
delineation of any areas to be left clear for access or other reasons, both below and adjacent
to the falsework;
d)
site investigation and other soils data relating to the ground on which the falsework is to be
founded;
e)
investigation of any water courses or sources that might affect the site by altering soil properties,
scour, flooding or creation of loads;
f)
the limit of loading to be applied to any permanent works foundations from the falsework;
g)
positions of all services, including overhead power lines, adjacent to the works and clearances
required by statutory authorities from roads, railways, power lines, etc., including any special
requirements of these bodies;
h)
construction method for the permanent works, defining:
1)
sequence of timing of load application;
2)
positions of construction joints;
3)
positions of any infill or shrinkage bays and timing of their concreting;
4)
limitations of absolute and differential settlements during construction; and
5)
timing and sequence of any post‑tensioning;
i)
any loads that are to be applied to the permanent works before the falsework can be removed;
j)
any significant redistribution of load in the permanent works before the falsework can be
removed, including those due to prestressing, creep, shrinkage and temperature;
k)
loads that are to be applied to the falsework by the method of construction from plant, stacking
and handling of materials, from access and attachments;
l)
exposure to wind for assessment of wind loads;
m) general specification of the falsework components to be used; and
n)
criteria that determine the stripping times and dismantling times of the falsework, including any
phasing of the removal of falsework to limit stresses in the permanent works during the removal
operation.
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