- เมื่องานติดตั้งโครงหลังคาอาคารหลั

-When the installation of the roof structure roof frame building, main building (if available) and the garage roof structure (if any) and then done. -When the installation or alteration to the roof and upper floors of the main building, the roof was completed.--When casting reinforced concrete stairs, floors 1 and 2 completed.-When a brick layer 1 and the installation of the wooden frame was completed more than 70% of the amount of work (masonry, representing the area, sash, a circle), except in section waiting for customer decision.-When a brick layer 2 and the installation of the wooden frame was completed more than 70% of the workload, level 2 (area brick representing meters, sash, a circle), except in section waiting for customer decision.

- Installation of roof on the main building, secondary building roof (if any) and the garage roof. (If available), then
- when the work place purlins and roof top floor of the main building was completed
- when the handsome staircase reinforced concrete floors 1 and 2 completed
- when Brick Layers 1 and install Frame section. is not completed more than 70% of class 1 (the brick a square meter, frame a number of the group) excluding the waiting customers decide
- on brick layer 2 and installing casing in the division. is not completed more than 70% of class 2 (a square meter area masonry, framing a number of the group) excluding the waiting customers decide.

- when the installation of roof, roof building the main building (if any) and roof in the garage (if any) was completed.- when the flat roof and a roof on the top floor of the main building completed.When casting concrete stairs and floor 1 2 completed.- when the brickwork floor 1 and installed in the frame, in part, as a wood completed over 70% of the floor area is 1 (brick, square. A number of the frame), except in the waiting customers decide.- when the brickwork floor 2 and installed in the frame, in part, as a wood completed over 70% of the floor area is 2 (brick, square. A number of the frame), except in the waiting customers decide.