Volume-IF - JantERmantER

3.20.3 Design
DCPL-K4A02
They shall not be allowed to accumulate at the bottom of the formwork.
The oiling of the formwork will be inspected just prior to placement of
concrete and redone wherever necessary.
The formwork shall be so designed and erected that the forms for slabs
and the sides of beams, columns and walls are independent of the
soffits of beams and can be removed without any strain to the concrete
already placed or affecting the remaining formwork. Removing any
props or repropping shall not be done except with the specific
approval of the Engineer. If formwork for column is erected for the full
height of the column, one side shall be left open and built up in sections,
as placing of concrete progress. Wedges, spacer bolts, clamps or other
suitable means shall be provided to allow accurate adjustment and
alignment of the formwork and to allow it to be removed gradually
without jarring the concrete.
The design of formwork shall take into account all vertical and lateral loads
that the forms will carry or be subjected to during the construction
process. Besides weight and pressures of reinforced concrete and
weight of the forms themselves, the design shall consider loading due
to unsymmetrical placement of concrete ; impact from dumping of concrete
; movement of men and construction equipment ; wind action and any other
imposed load during construction. The contractor shall assess the
magnitude of vertical live load to be taken for design of formwork duly
considering his method, sequence and rate of pouer of concrete.
However, minimum design vertical live load to be considered shall be 750
kg/sqm excluding weight of concrete.
3.20.4 Inspection of Forms
Casting of Concrete shall start only after the formwork has been inspected
and approved by the Engineer. The concreting shall start as early as
possible within 3 (three) days after the approval of the formwork and
during this period the formwork shall be kept under constant vigilance
against any interference. In case of delay beyond three days, a fresh
approval from the Engineer shall be obtained.
3.20.5 Removal of Forms
Before removing any formwork, the Contractor must notify the Engineer
well in advance to enable him to inspect the concrete if he so desires.
The Contractor shall record on the drawing or in any other approved
(PCA.774.S034sca2) V.II-D2/S-III : 30