Inscribe a mono-stringer stair into the surveyed well

Constraints below are read from the site sketch (W 2405 · L 4035 · FFL1 3609 · slab 200 assumed · return wall 156 × 1617). Amend anything, the stair re-inscribes itself and the DBC Part K checks update live.

Stairwell envelope

W — clear well widthleft wall to return wall face

L — well lengthopen side to top wall

H — FFL0 to FFL1floor to floor

S — FFL1 slab thicknessassumed 200 on sketch

FFL1 slab edge into well0 = slab stops at open side

Right-hand return wall

On the sketch the 2405 is taken to a 156 mm wall that runs 1617 from the top wall; below it the right side opens into the adjoining space (the shelves / boxes area on the photos). Confirm on site.

Return wall present

Length from top wall

Thickness

Adjoining recess widthbeyond the return wall (assumed)

Recess floor open at FFL0guard needed on that side

Arrangement

Lower flight sideas existing: rises on the right

Show walls & slabs

Show dimensions

Geometry

Total risers (n)C = H ÷ n

Risers in lower flight (n₁)landing is riser n₁

B — goingtread depth, nosing to nosing

A — tread widthclear width per flight

D — landing depth

Wall clearanceeach flight to wall

Bottom offsetpush whole stair up the well

Build-up

Tread thicknessopen riser gap = C − thickness

Nosing overhang

Spine widthbox section

Spine depth

Guard heightabove nosing / landing

Handrail heightabove nosing (wall side)

Riser infill barcloses open-riser gap

Treads

Spine

Guard on the well side

Handrail

Wall-side handrailØ42 tube, bracketed

Dubai Building Code 2021 · Part K (villas)

Private stair inside a dwelling. Values are the DBC clauses as used in CAworks compliance reports; verify against the current edition before submission.

Specification summary

CAworks Designer Glass & Steel Works L.L.C · Al Quoz, Dubai · team@caworks.co · +971 50 636 9524

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Spine stair · CAworks