Fit three treads to start with as it will make it easier to move the staircase around while construction
is continuing. Fix the treads using (part1) 5 x 60mm screws. Stand the staircase up against the tower
ensuring the treads are level (from back to front and sideways). Measure down from the top tread to
the top of the platform. This will tell you how deep the hole will need to be for the bottom of the
stairs. The top tread will need to be level with the platform when in its final position. Attach the stair
string (part B) to the tower uprights (parts X) using 4 x 5x80mm screws (part 2). Fix the posts (part D)
also using 4 x 5x80mm screws (part 2). Ensure the posts are upright before fixing. Fix the hand rail
flush with the top of the post (part D) and flush with the inside edge of the tower upright (part X).
When fitting the handrails ensure they are parallel with the stair strings (sides). The height of the
handrail will be governed by the depth of the bottom holes but, the holes should be no more than
300mm deep. Now fit the rail (part C from P4) to the tower uprights (part X). It should sit tight to the
underside of the stair strings. Fix using 4 x 5x60mm (part 1). Now screw through from the back of
this rail into both stair strings using 2 x 5x80mm (part 2). (See picture top right)
