Thanck's ...so here it is :

From Jazzman

Ingredients:

68 Breeze blocks 29 x 19 x 7 @ 3.50 to 4.80 each depending where you live, average 278.00

3 pcs. RB9 approx 60.00 - 75.00 each, depending on current prices. 'bau' quality is OK for this job. average 202.00

1 column approx 3 m 200.00 - depending whether you buy ready made, or make it yourself. average 200.00

0.258 cu self-mixed concrete approx 200.00

Rendering (sand & special cement) approx 160.00

Mortar for bricks approx 160.00

TOTAL 1,200.00

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hum breeze block are not 39 x 19 x 7 ?

ok so 68 blocks means : 0.39 x 0.19 = 0.0741 = 1 m : 0.0741 = 13 .49. blocks

so 68 : 13.5 = 5 m2........160 bahts : 5 = 32 B for 1 m2....one bag cement 135 b : 32 = 4.21 ....50 kg : 4.21 = 11.87 kg for 1 m2.

approximative : 11.8 kg by m2 !!!

well now i have 3 measures : 7 , 10 and 11.8 so its mean must be around 10 kg !!!

But I better calculate with 12 kg..loll but still better than my BOQ who say : 50 kg for 1 m2

any comment about ?