CONVERSION TABLES FOR VARIOUS CONSTRUCTION MATERIALS

1. CONCRETE: (Materials per M3)

Nominal mixby volume

Cement(1.442kg/ M3)

Sand1602kg/ M3

Aggregate(1.442kg/ M3)

TonM3 Ton M3 Ton M3

a. 1:1:2

b. 1:1½ :3

c. 1:2:4

d. 1:3:6

e. 1:4:8

0.52

0.39

0.30

0.22

0.17

0.36

0.27

0.21

0.15

0.12

0.58

0.64

0.69

0.72

0.74

0.36

0.40

0.43

0.45

0.34

1.05

1.15

1.23

1.30

1.34

0.73

0.80

0.85

0.90

0.93

Note:

a. waste factors (stockpile)

i) 5% for cement

ii) 10% for sand

iii) 2½ waste on all to cover residue waste in barrows and mixer.

2. STEEL REINFORCEMENT

A. Density 7850KG/M 3

BarRound bars

Kg/M

Square twisted barKg/M

6mm

8mm

10mm

12mm

16mm

20mm

25mm

32mm

38mm

40mm

0.222

0.395

0.616

0.888

1.579

2.466

3.854

6.313

8.904

9.870

0.283

0.502

0.785

1.130

2.007

3.136

4.906

8.038

11.335

12.564

B. nominal weights of Fabric Mesh

i) A – 198 = 1.54kg/M2

ii) A – 142 = 2.22kg/ M2

iii) A – 193 = 3.62kg/ M2

iv) A – 252 = 3.95kg/ M2

v) A – 393 = 6.16kg/ M2

For estimating purposes

i) Beams - 220kg/ M3 of concrete

ii) Columns - 150kg/ M3 of concrete

iii) Floor slabs (125) - 20kg/ M2 of concrete

3. CONCRETE BLOCKS

a) Metric size blocks (390mm x 190mm) = 12.5 blocks per M2

b) Imperial size blocks (10” x 9”) = 9.25 ditto

4. BUILDING STONE

a) Imperial size 9” x 18” on the face = 10.50 No. per SM

Note:

The above is for 18” long stones per SM.

5. CONCRETE ROOFING TILES

TILE SIZE NO. PER SM REMARKS

i)

ii)

iii)

iv)

v)

420mm x 335mm (Mareba)

Ditto

415mm x 240mm (Mangalore tiles)

380mm x 230mm (Manson-Hart)

420mm x 330mm (Manson-Hart)

9.70

10.20

15.48

16.14

9.70

75mm lap

87mm lap

Single roll

Double roll

GUIDE TO TRANSPORTERS (MAREBA)

Tonnage No. of Tiles Tonnage No. of Tiles

1

2

4

7

200

400

800

1400

8

10

12

25

1600

2000

2400

5000

Note:

a. Allow 2% breakage in Nairobi and upto 5% outside.

b. For half round ridge tiles size 408 x 204mm, the effective cover per ridge/hip tile is 300 x 204mm.

6. G.C.I. SHEETING

a. Gauges 24 & 26: Cover width per M = 762mm

7. RESINCOT: I.T.4 AND I.T.5

a. I.T.4 gauge 24 & 26: Cover width per M = 685mm

b. I.T.5 ditto = 635mm

8. PLASTER

Materials per M 3

Nominal mix by volume

Cement(1442kg/ M3

Sand(1602kg/ M3

1:3

1:4

Ton M3 Ton M3

0.48

0.38

0.33

0.27

1.60

1.70

1.00

1.06

9. MORTAR ON WALLING

Wall Thickness Volume of dried mortar per SM

90mm

140mm

190mm

225mm

240mm

0.00675 M3

0.01005 M3

0.01425 M3

0.017 M3

0.018 M3

Notes:

a. Joint thickness approx. 10mm

b. Volume of mortar approx. double for stone walling

c. 1 bag of cement (50kg) constructs approx. 8 M2 of 225mm thick block walling

10.PAINT

Application Paint typeCoverage per liter (SM)

per coat

Glass finishes

Wall finishes

Wood finishes

Super gloss

Nu – plastic

Vinly wall sheen

Red wood seal

Polyurethane

12 – 14

14 – 16

13 – 15

14 – 16

Other Data on Paint

1 M2 - Takes approx. 0.07 liters/1 coat

- Ditto - 0.14 ditto/2 coats

- Ditto - 0.21 ditto/3 coats

11.STEEL CASEMENT WINDOWS

PANES/ M2 PUTTYSTEEL KG/ M2

Not exceeding 0.10

0.10 – 0.50

0.50 – 1.00

Exceeding 1.00

1.260

0.625

0.500

0.460

Note:

0.09kg of putty will cover I meter girth of glass.