Estimate Lesson 2 Formworks
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Transcript of Estimate Lesson 2 Formworks
Formworks
the term given to either temporary or permanent molds into which concrete or similar materials are poured.
Formworks
Formula in Finding the Materials for Square and Rectangular Column Forms
P = 2 ( a + b) + 0.20
P = lateral perimeter of the columna = shorter side of the columnb = the longer side of the column0.20 = constant value for the lapping of joints
Sample Formworks Computation for Column
a. Solve for the Lateral perimeter: P = 2 ( a + b ) + 0.20P = 2 ( 0.40 + 0.60 ) + 0.20P = 2.20 m
b. Multiply the height and number of columns to get the lateral surface area.Area = P x H x No. ColumnsA = 2.20m x 5.0m x 10 A = 110 sq. metersc. Divide areas by 2.88 to get number of plywood
Sample Formworks Computation for Column (cont)c. Divide areas by 2.88 to get number of plywood
d. Solving the 2” x 2’ wood frame, multiply 29.67 board foot
39 Plywood x 29.67 = 1,157 board foot
Circular Column
1. Solve for the circumference of one column2. Multiply by column height to find the surface
area3. Multiply the area by the number of columns
Formworks
Formula in Finding the Materials for Beams and Girder Forms
P = 2 ( a + b) + 0.10
P = lateral perimeter of the columna = shorter side of the columnb = the longer side of the column0.10 = constant value for the lapping of joints
Board Foot of Wood Frame for Column and Beam per Plywood Form
Size of Wood Frame
Thickness of Plywood Form
Post Beam
6 mm (1/4")
12 mm (1/2")
6 mm (1/4")
12 mm (1/2")
2" x 2" 29.67 20.33 25.06 18.66
2" x 3" 44.50 30.50 37.60 28.00
Scaffoldings
The End for now…