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In order to proceed with the assembly, unpack all stair components and lay them out on a sufficiently large surface.
Check all components for quantity, comparing with the list in TAB.1 (A = Code, B = Quantity).
In the packing box you will find a DVD showing the assembly. We suggest watching it before proceeding with the
assembly.
For customers in the USA there is a customer assistance number 1-888 STAIRKT, which you can telephone in case
of problems.
Assembly
1. Measure carefully the floor-to-floor height (H) (fig. 2).
2. Calculate the height of the Rise:
a) deduct 20,5 cm (8
b) divide the result by the number of rises - 1 (divide by the number of treads, as the last rise is given by the
distance between the last tread and the landing floor).
Example (fig. 2): with a floor-to-floor height of 263 cm (103
treads): (263 – 20.5 / 13 – 1) (103
3. Measure carefully the ceiling opening (C) (fig. 2).
4. Calculate the measure of the Going (P):
with the version of the staircase L=74 (29
a) Deduct from the measure (C) of the ceiling opening the following steady measures:
" ) = depth of the last tread;
13
1) 29 cm (11
/
32
3
" ) = angle treads;
2) 69 cm (27
/
16
" ) = distance from the wall.
25
3) 1 cm (
/
64
b) Divide the result by the number of the remaining treads.
Example: with a ceiling opening measure of 231 cm (90
following:
231 – 29 – 69 – 1 / 6 (90
With the version of the staircase L=89 (35
a) Deduct from the measure (C) of the ceiling opening the following steady measures:
1) 33 cm (13 " ) = depth of the last tread;
" ) = angle treads;
1
2) 84 cm (33
/
16
" ) = distance from the wall.
25
3) 1 cm (
/
64
b) Divide the result by the number of the remaining treads.
Example: with a ceiling opening measure of 262 cm (103
following:
262 – 33 – 84 – 1 / 6 (103
5. To determine easily the drilling point on the ceiling, you can fit with the crew C53, the tread L25 onto the support
N20 without tightening it definitively. In this manner it will be easy to sign the drilling points in line with the holes
in the plate of the final support. Drill with bit Ø 18 mm (
ceiling with the articles C48 checking the horizontal line of the stair.
6. Prepare the tie-rods C22 inserting the flat washers C20 with the knurled surface towards the support flange and
the nuts B99. Fit the elements N24 to the supports N21, N22 (fig. 3). Insert, without tightening, the screws
B07, B06 and B23. Insert the tubes C21 into the internal part of the elements N24; the tie-rods C22; the flat
washers C20 with the knurled surface towards the support flange and the nuts B99. Set the measure of the
going (P): for the straight treads the measure (P) is like calculated before (see point 4).
For the angle treads the going has a measure (P) of:
" ) (fig. 2A) for the version with the tread width (railing included) L=74 (29
7
20 cm (7
/
8
" ) (fig. 2B) for the version with the tread width (railing included) L=89 (35
7
24 cm (9
/
16
Fasten definitively the crews B07, B06 and B23. Proceed with the assembly of all the supports N21. Screw the
tube with the threaded tie-rod N25 to the support 2nd rise N22 until the end.
7. Insert the articles C13 and B02 into the elements F23. Fit the elements F23 with the articles C57 on level with
the fore edge of the treads L25 upside down (on the side with the holes). Drill with bit Ø 4.5 mm (
3
depth of 30 mm (1
8. Fit the tread L25 to the support N20 with the screws C53. Check the horizontal line of the tread and tighten
definitively the articles C48. Put on the article D34 to cover the bracket with the help of the elements B12 and
C62, drilling with bit Ø 8 mm (
9. Fit an intermediate support N21 into the final support N20. Fasten it below by means of a self-blocking clamp
before tightening. Assemble the tread by using the screws C53. (As you proceed with the assembly of supports
and treads, it is necessary to prop-up the supports with a mechanical steel prop, so that the ceiling will not have
to bear too much weight). It is necessary to put a piece of wood under every 4 to 5 supports and it is strictly
" ) (height of the first rise) from the floor-to-floor height (H);
1
/
16
" – 8
9
/
16
1
" – 11
" – 27
15
13
/
/
16
32
1
" – 13 " – 33
1
/
8
" ) (fig. 1) (fig. 7).
/
16
" ) (fig. 4) (fig. 5).
5
/
16
9
" ) and a staircase with 13 rises (i.e. with 12
/
16
" / 13 – 1) = 20.21 cm (7
1
/
16
" ) (railing included) as in fig. 2A the calculation is the following:
/
8
" ) and a staircase as in fig. 2A, the calculation is the
15
/
16
" –
" / 6) = 22 cm (8
3
25
/
/
16
64
" ) (railing included) as in fig. 2B the calculation is the following:
/
16
" ) and a staircase as in fig. 2B, the calculation is the
1
/
8
" –
" / 6) = 24 cm (9
1
25
/
/
16
64
" ) (fig. 4) (fig. 5). Tighten the final support N20 on the
45
/
64
6 - kp
" ).
31
/
32
" ) ( = measure of the going).
21
/
32
" ) (= measure of the going).
7
/
16
" ).
1
/
8
" ).
1
/
16
11
" ) to a
/
64
