| 摘要 |
This invention pertains to a novel adjustable formwork system which can be used in the manufacture of a wide range of structurally efficient cross-sectional shaped concrete beams, columns and structures. A cast-in-place concrete beam form comprising: (a) at least two spatially oriented upper sleeves (70), with an upper web located on one side of the two sleeves, and extending therebetween; (b) at least two spatially oriented lower sleeves (72), with a lower web located on one side of the two sleeves, and extending therebetween; and (c) at least two members (98), each member connecting telescopically the respective upper sleeve with the respective lower sleeve, said telescoping members (98) enabling the two upper sleeves (70) to be raised or lowered relative to the two lower sleeves (72). |
