5. General Construction Materials and Equipment
Piling for Bangkok area and surrounding area: One storey house pre-stressed concrete pile I-22, length does not exceed 10.00 m. (2 piles welded connection)
Two storey house pre-stressed concrete pile I-22, length does not exceed 16.00 m. (2 piles welded connection).
Piling for Provincial area (stiff soil): One storey house pre-stressed concrete solid square pile 22 X 22 cm., length does not exceed 8.00 m. is used.
Two -3 storey house pre-stressed concrete solid square pile 22x22 cm. length does not exceed 10.00 m. is used.