| 摘要 |
PURPOSE:To make it possible to construct with ease so that each tread may be installed with a definite spacing with regards to height dimensions from a lower story floor to an upper story floor. CONSTITUTION:A plurality of treads 2 are installed and fixed between both cut strings at a definite spacing, thereby forming a staircase main body 3. The upper end position of the staircase main body 3 is in conformity with an upper story floor 4 so that both the cut strings of the staircase main body 3 may be fixed with a side wall 5 to be constructed where a height adjustable tread 7 is installed at a space between the lower end of the staircase main body 3 and a lower story floor 6. In this case, a riser 8 is installed between each tread while the tread 7 is formed with an upper board 9 and a cuttable leg body 10. |
