Table of Contents
How do you calculate formwork for slab and beam?
For simple square and rectangular forms, simply multiply length x width to know how much formwork you need. For a circular base, multiply the square of the radius by pi (πr²). For irregular shapes, break these down into simpler squares and rectangles and add up the total surface area.
How do you calculate formwork on a beam?
- Take the cross-section of beam and measure the lengths of the two sides and base of beam.
- Sum the three measurements.
- Measure the span of the beam.
- Multiply the span length by sum of the three measurements (beam base two vertical sides) gives the shuttering area of beam.
What is formwork of beam?
Forms are molds to receive concrete in its’ plastic form. Formwork is temporary structure, as such, it is not normally shown on the drawings.
How do you calculate formwork and scaffolding?
The formula for solving the required number of pieces of plywood for formworks of beams is P = 2 ( d ) + b + 0.10. ‘P’ is the perimeter of the three sides you want to estimate, ‘d’ is the length of the vertical side and ‘b’ is the bottom form.
How do you calculate concrete pressure on formwork?
To compute the full fluid pressure, multiply the concrete height by the unit weight of the fresh concrete [150 pounds per cubic foot (pcf) for standard weight concrete] as shown in Example 1. For a concrete height of 10 feet, the full fluid pressure is equal to 1,500 pounds per square foot (psf).
How do you calculate slab beam shuttering?
The shuttering is calculated in terms of Sq….Calculating Shuttering area:-
- Perimeter of Square : 4S (S = Length of Side)
- Perimeter of Rectangle : 2[L+B] (L=Length & B = Breadth)
- Perimeter of Circle : 2πr (r = Radius of circle)
- Area of Rectangle = Length x Breadth.
- Area of Square = Side x Side.
How is formwork constructed?
Formwork in construction means the application of support structures and moulds to form structures out of concrete that is poured into the moulds. Formwork is built up with moulds which comprise of steel, wood, aluminium and/or prefabricated forms. The process for eliminating the formwork is called as stripping.
How do you calculate slab shuttering material?
Let’s get started. The length of the slab = 50 feet. The width of the slab = 30 feet. Total covered area = Length x Width = \%0 x 30 = 1500 sft.
How do you calculate formwork for a concrete beam?
Formwork for concrete beams, girders and other horizontal forms should only be fitted on three sides, with shuttering supporting the two vertical sides and the bottom face. The top face should be left exposed. Add the lengths of the three sides, then multiply by the span of the beam to calculate the formwork area needed.
How to estimate the quantity of formwork for slabs?
Similarly, for slabs, the formwork quantity is estimated as bottom area of the slab plus the side areas (if applicable). This general practice of estimating the quantity of formwork is used while preparing client & sub-contractor bills, where the rate for the work is set per unit area.
How do you calculate the area of a beam?
The top face should be left exposed. Add the lengths of the three sides, then multiply by the span of the beam to calculate the formwork area needed. Square and rectangular beams and girders may be made from plywood supported by lumber or metal.
How do you calculate the shuttering area of a slab?
Calculate the shuttering area of slab only. (Length & Breadth) Calculate the shuttering area of beams and number of beams. Finally Add 1&2 and deduct 3 to attain the shuttering quantity of slab. How do I calculate the slab and beam form work?