Double quarter-turn staircase GOULES 180x180 Fir
GOULES 180x180 solid fir double-quarter-turn staircase — 285 cm high. 15 treads, 90 cm wide, 19 cm riser height, 21 cm going, 220x32 mm tread section and 180x180 cm stairwell opening. Delivered in 4 packages. Available with or without risers. The double-quarter-turn design (two turning sections) suits large square openings. Assembly fixings and instructions included. Unfinished, untreated fir — must be finished before installation. Indoor use only. Compatible with PUECH and TRELIS handrails — check the orientation before ordering.
GOULES 180x180 double-turn staircase - Fir, 285 cm, 180x180 cm stairwell opening
The GOULES 180x180 is a solid fir double-turn staircase, designed for layouts where the staircase needs to make two 90° turns. Its "180x180" designation refers to the required square stairwell opening: 180x180 cm. It is designed for a 285 cm floor-to-floor height, with 15 treads, a 90 cm width and a 220x32 mm tread cross-section.
The rise is 19 cm and the going 21 cm — generous dimensions that make it more comfortable to climb than a staircase in the Standard range (20 cm rise / 19 cm going). The staircase’s overall dimensions are 1800x1800x2850 mm (W x D x H). Delivered in 4 packages. Available with or without risers and a handrail.
Main features
| Feature | Description |
|---|---|
| Type | Double-turn staircase, indoor, kit |
| Wood species | Untreated solid fir |
| Floor-to-floor height | 285 cm (can be cut down) |
| Number of treads | 15 |
| Rise | 19 cm |
| Going | 21 cm |
| Width | 90 cm |
| Tread cross-section | 220x32 mm |
| Overall staircase dimensions | 1800x1800x2850 mm (W x D x H) |
| Recommended stairwell opening | 180x180 cm |
| Risers | With or without, as you prefer |
| Orientation | Right or left — specify when ordering |
| Handrail | Optional — not reversible; orientation depends on the staircase ordered |
| Finish | Unfinished fir — a finish must be applied before use |
| Use | Indoor use only |
Number of packages
- ✓ 4 packages: standard delivery
Key points
- ✓ 180x180 cm square stairwell opening: symmetrical double-turn configuration — two quarter turns with a centred opening
- ✓ 21 cm going: longer than in the Standard range (19 cm) for greater comfort when climbing
- ✓ 220x32 mm cross-section: wide, thick treads with little flex under load
- ✓ 90 cm width: comfortable passage, suitable for moving furniture
- ✓ 4 packages: makes large components easier to handle
- ✓ Can be cut down: can be adapted to floor-to-floor heights below 285 cm
Installation advice
The stairwell opening must be a true square measuring at least 180x180 cm — check that the corners are square before ordering. The overall 1800x1800 mm footprint means the staircase occupies a 1.8 m x 1.8 m area on the floor. Check that the room has enough space for these dimensions. The turning direction (right or left) must be chosen before ordering.
Delivered in 4 packages: allow enough storage space before assembly. Assembling a double-turn staircase requires at least two people and a full day’s work, depending on experience. Follow the assembly order in the instructions carefully.
Care and protection
Apply a protective finish before first use. For a double-turn fir staircase used as the main staircase, 2–3 coats of stair varnish are recommended for maximum durability. Reapply every 5–7 years. Clean with a damp cloth and a pH-neutral cleaner. Check that the fixings are tight once a year.
WoodUp tip
A double-turn staircase requires a square 180x180 cm stairwell opening — this is the main constraint. Before ordering, check that your structure allows an opening of this size (taking account of load-bearing elements and joists). If your existing opening is smaller than 180x180 cm, the ROCLES 160x160 (160x160 cm opening) may be an alternative. If your opening is rectangular, a single-turn staircase (turning at the top or bottom) is more suitable.
Before you buy: a double-turn staircase is the most complex type of staircase kit to assemble. Allow a full day for assembly and have two people with good DIY skills available. The instructions are detailed, but assembly is still more demanding than for a straight or single-turn staircase.
Frequently asked questions
What is the difference between the GOULES 180x180 and the ROCLES 160x160?
The GOULES 180x180 is made of fir and requires a 180x180 cm stairwell opening; it has 15 treads, a width of 90 cm and a 220x32 mm tread cross-section. The GOULES 160x160 is also made of fir and requires a 160x160 cm opening — it is more compact but narrower. The 180x180 is more comfortable (21 cm going, 90 cm width) and is the better choice when the available opening allows it.
Can the GOULES 180x180 be cut down for a height of 264 cm?
Yes. The staircase is designed for 285 cm. For 264 cm, one tread can be removed (giving a rise of around 19 cm), then approximately 2 cm can be trimmed from the stringers to adjust the fit. This reduces the starting footprint by approximately one going. The intermediate turn and the top section do not change — their positions are fixed by the design.
How can I check whether my stairwell opening is suitable for the GOULES 180x180?
The stairwell opening must be square and measure at least 180x180 cm after all finishes and coverings have been fitted. Measure the diagonals to check that it is square — an opening that is not square can cause alignment problems during assembly. Allow an additional 2–3 cm in both length and width for installation clearance.
Is the GOULES 180x180 self-supporting, or does it need to be fixed to a wall?
The staircase is fixed to the floor at the bottom and to the upper floor at the stairwell opening. A side wall fixing can be added for extra stability, but is generally not essential if the upper and lower fixings are secure. Consult the instructions for fixing specifications suited to your installation.
Which finish do you recommend for a heavily used double-turn fir staircase?
For a heavily used main double-turn staircase, 3 coats of water-based polyurethane stair varnish provide optimal protection. The treads of a double-turn staircase, particularly the winder treads at the turns, are subject to varying stresses — a thick varnish holds up better over time than hardwax oil. Reapply every 5 years on the treads and every 7 years on the stringers.
Why choose a double-turn staircase rather than two separate quarter-turn staircases?
A double-turn staircase is a single staircase designed to make a complete 180° turn as it rises, within a square area. It is an option when the direction at the top is opposite to the direction at the bottom and the room cannot accommodate a straight or single-turn staircase. Its square footprint (180x180 cm) is more predictable than that of an L-shaped staircase.
Other staircases in our range
GOULES 160x160 - Double-turn fir staircase, 160x160 cm stairwell opening
ROCLES 180x180 - Double-turn beech or oak staircase, 180x180 cm stairwell opening
ALBULA - Comfort range double-turn staircase, 18 cm rise, 22 cm going
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