Aluminium Lattice Scissors Loft Ladder
A scissor-action loft ladder whose flat aluminium links cross in two side lattices, with wide flat treads, folding into a hatch in the ceiling. Ceiling opening width and length, Room height, Stowed or unfolded
Details
Category: Loft Ladders › Loft Ladders And Access Doors
By Huu Khanh Nguyen · Updated November 5, 2026
Parameters
| Name | Default | Unit |
|---|---|---|
| Ceiling opening width | 600 | mm |
| Ceiling opening length | 1200 | mm |
| Room height | 2800 | mm |
| Unfolded | 1 | |
| Hatch width | openingWidth - 55 | mm |
| Hatch length | openingLength - 55 | mm |
| Hatch thickness | 76 | mm |
| Tread length | 320 | mm |
| Step count | Math.min(14, Math.max(9, Math.ceil(roomHeight / 300))) | |
| Row shift | (1150 + (roomHeight - 2390) * (2570 - 1150) / (4150 - 2390)) / stepCount * unfold + 35 * (1 - unfold) | mm |
| Row drop | -(roomHeight - 30) / stepCount * unfold | mm |
| Tread tilt | 1.5707963267948966 * (1 - unfold) | |
| Top row height | (hatchThickness + 74) * (1 - unfold) | mm |
| Hatch angle | Math.atan2(roomHeight, 1150 + (roomHeight - 2390) * (2570 - 1150) / (4150 - 2390)) * unfold | |
| Ladder pivot | -innerLength / 2 + 100 | mm |