Planning and Design, Straight Flight Staircases

STRAIGHT FLIGHT STAIRCASES, PLANNING AND DESIGN

With many years' experience, we are happy to help you with guidance and advice during planning and design. On ordering, each staircase is drawn up specially and the drawing is sent to the customer for approval prior to manufacturing.


Gradient rise

In order for a staircase to be comfortable to walk on, a certain relationship between the incline angle, the rise and the tread width is required. Preferably the staircase's gradient should be between 30° and 45°; however, the available space is frequently limited making it impossible to attain the ideal gradient.

From the table, you can read off the suitable rise and tread width for a given staircase incline.

If you don't know the staircase angle, but, on the other hand, know the projection, you can divide the projection (L) by the staircase height (H), and look up the nearest figure to the right in the table.

Example:
Projection (L) = 3500 mm
Staircase height (H) = 2500 mm

L/H = 3500/2500 = 1.4, which gives the staircase angle 35°

Staircase angle Suitable riser Suitable tread width Relationship projection/staircase height*
60° 240 130-160 0.58
57° 230-240 160 0.65
55° 230 160-200 0.70
52° 220-230 160-200 0.78
50° 220 200 0.84
47° 210-220 200 0.93
45° 210 200-230 1.0
42° 200-210 230 1.11
40° 200 230-260 1.19
37° 190 260 1.33
35° 180-190 260-300 1.43
32° 175 300 1.6
30° 170 300 1.73

Dimensions, stringer profile WUC

The WUC profile is manufactured from 3, 4 or 5 mm sheet steel at heights of 120 and 170 mm. For other load cases, contact Weland.

Values for WUC profile according to table.

Type of stringer A
(mm)
B
(mm)
C
(mm)
t
(mm)
Tensile strength
Wy cm³
WUC 120/3 120 55 22 3 28,1
WUC 170/3 170 55 25 3 46,1
WUC 170/4 170 55 25 4 59,0
WUC 170/5 170 55 25 5 70,6
WUC 200/5 200 55 25 5 89,3

Childproof

Childproof means that none of the openings in the staircase are permitted to be larger than 100 mm up to a railing height of 800 mm.


Fixing and bracing

Straight flight staircases have different fixing and bracing alternatives depending on the size of the staircase. In the case of small staircases, fixing angles may be sufficient. Larger staircases may need both support beams and brackets.

We help you with the right fixing and bracing.

Fixing angles

Angle brackets for staircase and landing stringers.

Bracket

Bracket under landing stringers.

Support legs

Support leg and angle bracket under landing stringers.

Support beam

Support beam and support leg under landing.


Single flight staircases

Single flight staircases from a few steps to an entire staircase up to the next storey and step-off. The staircase does not turn with a turning landing. Single flight staircases can be produced in several different versions. Below, there are three different examples.

Single flight staircases, variant 1

Top tread one rise below existing step-off level.

Single flight staircases, variant 2

Top tread at the same level as existing step-off level.

Single flight staircases, variant 3

Staircase with landing at the top.


Multi-flight staircases

Multi-flight staircases are staircases linked together with turning landings. This allows very tall staircases to be made.


Stair treads

Additional information about our range of treads.

Grating stair treads with 33x50 mm mesh width. Hot-dip galvanized finish.
We recommend 17x75 mm if a closer mesh width is required.

Tear plate treads with a hot-dip galvanized finish.

Stair tread TLDT is manufactured from solid plank type flooring. The top has an embossed pattern offering good anti-slip protection.
Finish: Hot dip galvanised

Stair tread TLDT is manufactured from holed plank type flooring. The top has an embossed pattern offering good anti-slip protection. In principle, the same as solid plank type flooring but supplemented with punched oval holes 15 x 69 mm.
Finish: Hot dip galvanised

Stair tread TLDS is manufactured from slit plank type flooring. The serrated top provides extremely good anti-slip protection.
Finish: Hot dip galvanised

Stair tread TLDP is manufactured from perforated plank type flooring. The serrated top provides very good anti-slip protection. The planks have small openings (holes Ø 10 mm and 4 mm drainage holes). Provides greater protection against objects falling through the openings.
Finish: Hot dip galvanised

Grey concrete stair treads. Thickness 50 mm. The tread surface is finely brushed. The other sides are smooth cast. If the staircase is outdoors, the tread surface is coarsely brushed. The concrete rests on a support frame of sheet metal profiles.

Terrazzo concrete stair treads. Thickness 50 mm. The tread surface is finely brushed. The other sides are smooth cast. The concrete rests on a support frame of sheet metal profiles. This type of tread is suitable for outdoor use.

Stair treads shaped like a metal box for laying tiles. The standard depth of the metal box is 27 mm.

Stair treads that are to be carpeted come with a sheet metal tread designed for carpets. Stair nosing should be used if it is not possible to fold the carpet over the front edge.

Ash wood stair treads of solid, glued laminated timber, 30 mm. Coated with hardened lacquer as standard.

Birch wood stair treads of solid, glued laminated timber, 30 mm. Coated with hardened lacquer as standard.

Beech wood stair treads of solid, glued laminated timber, 30 mm. Coated with hardened lacquer as standard.

Oak wood stair treads of solid, glued laminated timber, 30 mm. Coated with hardened lacquer as standard.

Landings

Weland offers various types of standard landings. The landings are available in several versions and materials. Any design of landing and turning landing can be made to order. The landing can also be extended to make a platform/balcony.

Landing/turning landing 90°

Variant of turning or intermediate landing. 

Landing/turning landing 180°

Variant of turning or intermediate landing.

Landing, step-off straight forwards

Variant of square landing, where the staircase runs straight up to a door or floor joists.

Landing, step-off to the side

Variant of square landing, where the staircase runs at the side up to a door or floor joists.

Landing, step-off with widened landing

Variant of square landing, where the staircase runs up to a platform.


Railing infills

Additional information about our range of railing infills.

1 intermediate rail – standard on industrial staircases.

The railing infill comprises ø28 mm tube top and bottom rails. Round bars ø11 mm. Max. opening 100 mm.

We offer perforated sheet metal with a choice of hole patterns as standard.
Our most common patterns:

  • ø15, square pattern c/c 40
  • 15x15, square pattern c/c 40
  • ø20, square pattern c/c 50
  • 20x20, square pattern c/c 50
  • ø15, triangular pattern c/c 50
  • ø20, triangular pattern c/c 60

Other options are available.

Woven wire mesh with standard 40x40 mm apertures.

Laminated glass 8 mm (4+4) incl. foil. Fine-ground edge on all sides. Clamp brackets for railing baluster.


Fire resistance rating R30

We also offer spiral staircases with fire resistance rating R30. Requests for specific sizing should be stated in the contract documents.