5.2.6 chapter 3 - concrete works

8/12/2019 5.2.6 CHAPTER 3 - Concrete Works

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TAKING OFF QUANTITIES FOR BUILDING &CIVIL ENGINEERING WORKS



Concrete is the most important material inconstruction because its cost is very cheapand easily obtained compare to othermaterials.

The following tables show the appropriateunit of measurement for those items includedin the above section of work.

Reference should be made to the Standard

Method of measurement ( Clauses 5278) formore detailed information on the preparationof bill of quantities.



The items for concrete include supply,placing in forms or Shuttering vibrating and

curing.

Shuttering is measured by the area ofconcrete, which requires support duringsetting.

The items for shuttering include supply anderection, including all necessary struts andbearer, treatment before concreting and

removal when the concrete has set.



Example 4.1 Mass Concrete Of Retaining Wall

Prepare taking off sheet and bill of quantitiesfor mass concrete retaining wall with 30 m

length as shown in Figure 4.1(All measurement in mm)



1.8 m

Figure 4.1 : Plan View And Cross Section OfRetaining Wall

1.8m

1.8 m

Grade 7

Grade 15



The dimension sheet shall include

(i) Concrete work :◦ Mass concrete for foundation and mass concrete

for wall.

◦ Placing of concrete for foundation and placing ofconcrete for wall. Concrete for wall thickness

500mm shall be separate from concrete for wallthickness > 500mm.

(ii) Ancillaries work which comprise of :◦ Formwork for fair finishes and formwork for

rough finishes.◦ Inserts such as land drain and ashes in

continuous pocket.



Example 4.2 slab

Prepare taking off sheet and bill of for the

slab shown in Figure 4.2 with the thickness ofslab 300 mm. The dimension sheet shallinclude concrete work (mass concrete forslab) and reinforcement (bottom only).

Figure 4.2 : Plan View Of Slab



Example 4.3 Beam

The following example illustrates the method

of preparing a taking off sheet and BQ for thereinforcement of the r.c beam (6 units) asshown in Figure 4.3

Figure 4.3 :Cross Section of Beam

GROUND BEAM

For column & beam

5.2.6 chapter 3 - concrete works

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