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Before starting assembly, unpack all stair components. Place them on a large enough surface and check the
number of components, using the attached packing list.
The structure of the staircase is composed of three different types of support:
1) final support 116012 and 116022 for fixing staircase to upper floor.
2) intermediate support 116002 and 116004, with two different going sizes of 19–22.5 cm and 22.5–26 cm,
depending on the configuration chosen.
Caution: for versions with tread width L = 74 and 81 cm, and going of the straight tread 22.5–26 cm, at corner
treads the intermediates have a going of 19–22.5 cm.
3) base support 116006 for fixing staircase to lower floor (Fig. 1) (Fig. 2).
Assembly
1. Carefully measure the height between floors (H) (Fig. 3).
2. Carefully measure hole in ceiling (F) (Fig. 3).
3. C alculate going value (P):
for versions with tread width L = 67 / 74 cm and going 19–22.5 cm:
a) subtract the following dimensions from value found for hole in ceiling (F):
1) final tread, choose one of the two possible measurements, 29 and 26.5 cm;
2) corner treads;
3) distance from wall, from 3 to 6 cm.
b) divide this value by the number of remaining treads.
Example: for a ceiling hole of 228 cm and a staircase with tread L=74:
228 – 29 – 68 – 3 / 6 = 21.33 cm (Fig. 6).
for versions with tread width L =74 / 81 / 88 / 95 cm and going 22.5–26 cm:
a) subtract the following dimensions from value found for hole in ceiling (F):
1) final tread, choose one of the three possible measurements, 32, 29, and 26.5 cm;
2) corner treads or landing;
3) distance from wall, from 3 to 6 cm.
b) divide this value by the number of remaining treads.
Example: for a ceiling hole of 262 cm and a staircase with tread L=88:
324 – 29 – 82 – 5 / 8 = 26 cm (Fig. 7).
4. C alculate the average riser value:
a) subtract 20 cm (height of first riser) from value found for height between floors (H);
b) divide this value by the number of risers minus one. The value obtained must be a number between 18
and 23 cm.
Example: for a measured height between floors of 275,5 cm and a staircase with 14 risers:
(275,5 – 20/ 14 – 1) = 19,65 cm (Fig. 3).
5. C alculate the number of spacers 031078.
a) to calculate the total number of spacers 031078, depending on the number of risers of the staircase and
height between floors (H), use CHART 2 (H = height, A = riser).
Example: for a measured height between floors of 275,5 cm and a staircase with 14 risers: for a height of
276, row A=14 gives 41. Distribute spacers 031078 one after the other on the part provided for this on
supports, until all spacers have been fitted.
b) to calculate the number of spacers if the number of risers envisaged is not shown in CHART 2:
Calculate the average riser value.
Subtract 18 cm (minimum riser height) from average riser height.
Multiply this number by the number of risers minus two.
Divide the result by 0.5.
Example: for a measured height between floors of 275,5 cm and a staircase with 14 risers, the average riser
value is:
(276 – 20/ 14 – 1) = 19,69 cm (The value obtained must be a number between 18 and 23 cm).
(19,69 – 18) x (14 – 2) / 0.5 = 40,32 = 41. Distribute spacers 031078 one after the other on the part
provided for this on supports, until all spacers have been fitted.
6. I f necessary, cut the 033150 elements along the pre-cut line (cutting is necessary for a depth of 29 cm).
Assemble the 116022, 116012 and 033150 elements of the final support with items 011062, 009008 and
005009 according to the depth chosen previously (see point 3) (Fig. 4) (Fig. 6) (Fig. 7).
7. I f necessary, cut the final straight tread with an electric jigsaw (cutting is necessary for depths of 29 and
26.5 cm (Fig. 4), use sandpaper to remove any roughness on edges and protect with the supplied wood paint
030-040_GENIUS_MY_RA.indd 10
10 - Genius 030 - 040 RA
09/12/11 14.29
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