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.
Filtration
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, 170 and 200 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.
Step made from grating with mesh width 34 x 75 mm.
Supplied in hot-dip galvanized version. In instances where a
narrower mesh width is required, we recommend 17 x 75 mm.
Tear plate treads with a hot-dip galvanized finish.
TLDT stair treads are made from solid plank type flooring. The top has an embossed pattern offering good anti-slip protection. Hot-dip galvanized version.
TLDH stair treads are made 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. Hot-dip galvanized version.
TLDS stair treads are made from slit plank type flooring. The step surface affords extremely good anti-slip protection. Hot-dip galvanized version.
TLDP stair treads are made from perforated plank type flooring. The step surface affords very good anti-slip protection. The planks have smaller openings (holes Ø 10 mm and 4 mm drainage holes). This provides greater protection against objects falling through the openings. Hot-dip galvanized version.
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 tread. Thickness 50 mm. Our standard colours are UBAB 31:01, 31:02 and 31:03, but other colours may be offered as options. Supplied with a fine brushed tread surface, whilst other sides are smooth cast. The concrete rests on a sub-frame made from sheet metal profiles. This step type is not 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.
Stair tread made from ash with solid laminated wood, 30 mm. Supplied varnished as standard.
Stair tread made from birch with solid laminated wood, 30 mm. Supplied varnished as standard.
Stair tread made from beech with solid laminated wood, 30 mm. Supplied varnished as standard.
Stair tread made from oak with solid laminated wood, 30 mm.
Supplied varnished 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.
Handrail and balusters in tube Ø 42 mm, a intermediate rail in tube ø 28 mm – 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
- 15×15, square pattern c/c 40
- ø20, square pattern c/c 50
- 20×20, 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 40×40 mm apertures.
Laminated glass 8 mm (4+4) incl. foil. Fine-ground edge on all sides. Clamp brackets for railing baluster.
Flat bar handrail 50×10 mm. Handrail and under rail, 40×10 or 30×10 mm. Round bars, diameter 11 mm. Max. opening 100 mm. When extra handrails are selected as an open, they are available in either 42 mm metal tubing, or 50 mm wood versions.
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.
