Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

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Economy of Formwork 19
Units
Total Elapsed Time at
Start of Unit, Week Forms for Source of Forms
9 8 Columns
Beam sides
Beam bottoms
Slab decking
Shores
10 9 Columns
Beam sides
Beam bottoms
Slab decking
Shores
11 10 Columns
Beam sides
Beam bottoms
Slab decking
Shores
12 11 Columns
Beam sides
Beam bottoms
Slab decking
Shores
Unit 7
Unit 7
Unit 6
Unit 6
Unit 6
Unit 8
Unit 8
Unit 7
Unit 7
Unit 7
Unit 9
Unit 9
Unit 8
Unit 8
Unit 8
Unit 10
Unit 10
Unit 9
Unit 9
Unit 9
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TABLE 2-2 Schedule of Use and Reuse of Formwork for a Building (Continued )
If structural sections such as columns, girders, beams, and floor
panels in odd-numbered units 1 through 11 are similar, and those in
the even-numbered units 2 through 12 are similar, but those in units
1 through 11 are not similar to those in units 2 through 12, it will be
necessary to move form sections to higher floors above given units.
For example, forms for unit 1 cannot be used in unit 2, or those from
unit 3 in unit 4, and so on. Under this condition, it will be necessary
to provide one set of columns and beam and girder sides for unit
1 and another set for unit 2, which will be sufficient for the entire
building. It will be necessary to provide a set of forms for the beam
and girder bottoms, slab decking, and shores for unit 1 and another
one for unit 3, and similarly for units 2 and 4.
Economy in Formwork and Overall Economy
The specifications for some projects require smooth concrete surfaces.
For such projects, it may be good economy to use form liners, such as
thin plywood, tempered hardboard, or sheet steel. Although the cost
of the forms will be increased, reduction in the cost of finishing the
surfaces will be reduced or eliminated. The small fins that sometimes
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