GB2030192A - Integral metal stair tread and riser adjustably connectable to adjacent tread and riser - Google Patents

Integral metal stair tread and riser adjustably connectable to adjacent tread and riser Download PDF

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Publication number
GB2030192A
GB2030192A GB7837381A GB7837381A GB2030192A GB 2030192 A GB2030192 A GB 2030192A GB 7837381 A GB7837381 A GB 7837381A GB 7837381 A GB7837381 A GB 7837381A GB 2030192 A GB2030192 A GB 2030192A
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GB
United Kingdom
Prior art keywords
riser
tread
staircase
flange
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB7837381A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MATREX Ltd
Original Assignee
MATREX Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MATREX Ltd filed Critical MATREX Ltd
Priority to GB7837381A priority Critical patent/GB2030192A/en
Publication of GB2030192A publication Critical patent/GB2030192A/en
Withdrawn legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02Stairways; Layouts thereof
    • E04F11/104Treads
    • E04F11/112Treads of metal or with an upper layer of metal

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)

Abstract

This has a flange 35 at the lower edge of the riser 29 and a flange 30 at the back edge of the tread 28, the flanges being directed at the same angle as the angle of the staircase, the upper flange having bolt holes 31, 31A, arranged at different distances along the direction of inclination of the staircase to suit different heights between floors. Riser flange 35 may have a single bolt hole 36 for connexion with one of the holes 31 or 31A. <IMAGE>

Description

SPECIFICATION Improvements in or relating to staircases This invention relates to metal staircases.
For the purpose of erecting buildings with floors spaced apart different modular heights it is a problem to reduce the number of parts required to make staircases to fit the various sizes. Buildings of this kind are made in accordance with this invention described in our British Patent Application Nos. 17780/77 and 3196/78. The height of the staircase may also vary somewhat according to the coverings on the treads.
According to the present invention a standard metal part is provided which is suitable for building most of the treads and risers for buildings having different floor spacings, said part comprising a sheet metal tread integral with a riser and having a flange at the back edge of the tread and a flange at the lower edge of the riser, said flanges being disposed at the angle of the staircase, and the upper flange having openings for a bolt which can be located at different distances along the direction of the inclination of the staircase.
The openings may be bolt holes e.g. the lower flange may have a single bolt hole each side and the upper flange may have a pair of bolt holes each side, the holes of each pair being spaced apart in the direction of inclination of the staircase.
The risers may be procided with bolt holes for attachment of webs fixed to vertical baluster rods. The tops of these rods are fixed to handrails.
The flanges are fixed to beams known as "rakers" or "strings" i.e. bars mounted as a pair of parallel to each other at the staircase angle in selected positions of adjustment. These beams are provided with bolt holes which have different spacings for different overall heights of flights, the spacings corresponding respectively to the size between the bolt holes of the bottom flanges and the upper and lower bolt holes respectively of the upper flange.
The bottom treat-riser part may be modified by turning the flange inwardly parallel with the tread for attachment to a base member. The top part of a flight of stairs may also be somewhat different i.e. may have a rear vertical flange for attachement to a landing member.
The staircase preferably consists of two flights of stairs parallel to each other in plan and jointed by a half-landing which extends transversely from one flight to the other.
The invention will be further described by way of example with reference to the accompanying diagrammatic drawings wherein :- Figures 1, 2 and 8 are elevational views showing staircases for different heights between floors; Figure 4 is an elevational view of a staircase made in accordance with the invention; Figure 5 is a sectional view of the bottom part of a staircase; Figures 6, 7 and 8 are respectively a side elevation front view and plan of a standard tread-riser part; Figures 9 and 10 are views similar to Figure 6 but showing modifications; and Figure l l is a view of a baluster mounting.
Figures 1 to 4 shows a staircase comprising a lower flight 15 and an upper flight 16 which are parallel to each other in plan extending in opposite directions to each other and connected together by a transverse half-landing 17.
In Figures 1,2 and 3 the floors are 4.2,3.6 and 3.0 metres apart respectively and all the tread-riser parts except the top and bottom of each flight are identical. In Figures 1,2 and 3 the upper flights have theirtread-riser parts located at maximum extension. In Figures 1 and 3 the lower flights are located at their condensed or contracted dispositions and in Figure 2 the lower flight has its tread-riser parts also at the contracted positions. Thus standard tread riser parts are suitable for all three staircases and others are possible.
Each flight of the staircase comprises a pair of supporting beams 20,21 spaced apart from each other and from the side of the staircase and parallel to each other at the angle of the staircase. These beams are commonly known as rakers or strings.
The flight also has balusters 22, hand rails 23, and tread-riser members 24.
All the tread-riser members except the top and bottom ones of each flight are identical as shown in Figure 6 and consist of a horizontal tread 28 integral with a riser 29. The rear edge of the tread 28 has an integral flange 30 disposed at the angle of the staircase and provided with two pairs of bolt holes 31,32 the pairs being spaced apart from each other and the holes of each pair being spaced apart from each other in the direction of the angle of the staircase and flange. The lower edge of the riser 29 also carried an integral flange 35 provided with a single bolt hole 36 at each side of the part.
For a flight of one size say 1800 mm height the bolt holes in the beams 20,21 will be spaced apart about 344 mm corresponding to the distance between hole 36 and hole 31. For a flight of another modular size say 1200 mm or 2400 mm height the bolt holes in the beams 20,21 will be spaced apart a distance of about 328 mm equal to the distance between the hole 36 and the hole 31A. Thus identical tread-riser members are used for both sizes of flights.
In order to build a staircase one may start with a base plate 38 provided with upstanding bolts 39.
Spacing layer or plates 40 are placed over the bolts.
The bolts 39 serve to secu re a channel member 42 to which is bolted or welded angle brackets 44 which in turn are welded or bolted to the two beams 20,21.
The first tread-riser member 45 is shown in Figure 9 and has its lower flange 35 turned inwardly. The member 45 seats on a member 46 fixed to the member 42.
All the other treads are the same as Figure 6 except the top tread of the flight which has a down turned vertical flange 50 (Figure 10) which is bolted to the first of a row of channel members 51 forming the half landing 17. The second flight is built in similar manner.
Tubular balusters 52 have vertical webs 53 welded to them at their lower ends which are bolted or rivetted through boit holes 54 in the risers 29. The tops of the balusters ae secured by plastics plugs 56, screws 57 and brackets 58 to the handrails.

Claims (6)

1. A metal part suitable for building staircases having different floor spacings, said part comprising a sheet metal tread integral with a riser and having a flange at the back edge of the tread and a flange at the lower edge of the riser, said flanges being disposed at the angle of the staircase, and the upper flange having openings for a bolt which can be located at different distances along the direction of the inclination of the staircase.
2. A metal part as claimed in claim 1 wherein the riser has bolt holes for connection with a baluster.
3. A metal part as claimed in claim 1 or 2 having a single bolt hole each side in the lower flange and a pair of bolt holes each side in the upper flange, the holes of each pair being spaced apart in the direction of inclination of the staircase.
4. A staircase made with parts as claimed in claim 1 or 2 and including a modified bottom part having the bottom flange turned inwardly parallel with the tread for attachment to a base member.
5. A staircase made with parts as claimed in claim 1 or 2 and including a modified top part having its forward flange turned down.
6. A staircase substantially as described with reference to the accompanying drawings.
GB7837381A 1978-09-19 1978-09-19 Integral metal stair tread and riser adjustably connectable to adjacent tread and riser Withdrawn GB2030192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7837381A GB2030192A (en) 1978-09-19 1978-09-19 Integral metal stair tread and riser adjustably connectable to adjacent tread and riser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7837381A GB2030192A (en) 1978-09-19 1978-09-19 Integral metal stair tread and riser adjustably connectable to adjacent tread and riser

Publications (1)

Publication Number Publication Date
GB2030192A true GB2030192A (en) 1980-04-02

Family

ID=10499782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7837381A Withdrawn GB2030192A (en) 1978-09-19 1978-09-19 Integral metal stair tread and riser adjustably connectable to adjacent tread and riser

Country Status (1)

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GB (1) GB2030192A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709520A (en) * 1986-07-28 1987-12-01 Vochatzer Richard L Stair brackets and stair structure
WO2002033200A1 (en) * 2000-10-17 2002-04-25 Intelligent Engineering (Bahamas) Limited Sandwich plate stepped risers
GB2442957A (en) * 2006-10-16 2008-04-23 Intelligent Engineering Method of manufacturing a stepped riser
US8408188B1 (en) * 2008-12-12 2013-04-02 Hormilla Performance Engineering LLC Engine accessory belt drive pulley

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709520A (en) * 1986-07-28 1987-12-01 Vochatzer Richard L Stair brackets and stair structure
WO2002033200A1 (en) * 2000-10-17 2002-04-25 Intelligent Engineering (Bahamas) Limited Sandwich plate stepped risers
US7047699B2 (en) 2000-10-17 2006-05-23 Intelligent Engineering (Bahamas) Limited Sandwich plate stepped risers
GB2442957A (en) * 2006-10-16 2008-04-23 Intelligent Engineering Method of manufacturing a stepped riser
WO2008047083A2 (en) * 2006-10-16 2008-04-24 Intelligent Engineering (Bahamas) Limited Method of manufacturing a stepped riser, an element for forming into a stepped riser and a stepped riser and a member for changing the mechanical dynamic performance of a stepped riser
WO2008047083A3 (en) * 2006-10-16 2008-07-03 Intelligent Engineering Ltd Bs Method of manufacturing a stepped riser, an element for forming into a stepped riser and a stepped riser and a member for changing the mechanical dynamic performance of a stepped riser
US8408188B1 (en) * 2008-12-12 2013-04-02 Hormilla Performance Engineering LLC Engine accessory belt drive pulley

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)