US3765137A - Prefabricated metal staircase - Google Patents

Prefabricated metal staircase Download PDF

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Publication number
US3765137A
US3765137A US00202082A US3765137DA US3765137A US 3765137 A US3765137 A US 3765137A US 00202082 A US00202082 A US 00202082A US 3765137D A US3765137D A US 3765137DA US 3765137 A US3765137 A US 3765137A
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Prior art keywords
staircase
accordance
step member
pair
members
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Expired - Lifetime
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US00202082A
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English (en)
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G Loix
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Individual
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/081—Rungs or other treads comprising anti-slip features
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • E04F11/025—Stairways having stringers
    • E04F11/0255—Stairways having stringers having adjustable gradient
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads

Definitions

  • a staircase in accordance with the invention is characterised in that it is "constituted by the assembly of extruded sections'cut to the measurements appropriate to the staircase characteristics required.
  • the invention provides a staircase constituted by an assembly or prefabricated components including a plurality of extruded sections cut to lengths to provide structural members appropriate to the size of the staircase, wherein the assembly comprises a pair of stringers or side members each provided by one form of said extruded sections having a hollow cross-section in the shape of a figure 8, the inner side wall of each said stringer or side member having mounted thereon a pair of longitudinal members provided by a second'form of said extruded sections, each longitudinal member having therein a plurality of holes at positions appropriate to the staircase angle adopted, said holes being fitted with projecting elements, each projecting element of one longitudinal member being related to a projecting element of the other longitudinal member so as to provide a pair adapted collectively to support one end of a step member which extends between the stringers or side members and which is provided by a third form of said extruded sections, said step member being capable of adapting itself to the distance between said pair of projecting elements which distance varies according to the angle adopted for the staircase.
  • FIG. 1 is a fragmentary perspective and partsectional view of one form of staircase assembly constructed in accordance with the invention
  • FIG. 2 is a vertical section through one side of the staircase assembly of FIG. I with the step, shown in the latter Figure, being omitted;
  • FIG. 3 is a vertical cross-sectional view of the step shown in FIG. 1.
  • the stiarcase assembly in accordance with the invention shown therein includes three kinds of extruded sections which provide constituent structure members and which may be composed on an aluminium metal.
  • the first kind of section is used to provide two main side members or stringers of which one, denoted by the reference numeral 1, is illustrated in the drawings.
  • the section of these stringers has a hollow box-like formation in the shape of a figure 8" and the side wall which is intended, in use, to be presented inwardly to confront the stairway is formed, towards top and bottom respectively, with longitudinally-extending openings or slots 2,2, of whichthe edges are provided with grooves 3 (see FIG. 2) and form a slideway.
  • a slide member 4 constituted by a second kind of extruded hollow section having a pair of oppositely projecting tongues S, 5, which engage in the grooves 3 and having also ribs or projections 6 which engage over an internal flange portion 7 bounding the slideway openings or slots 2, 2.
  • the third kind of extruded section is used to provide the members forming the steps of the staircase of which one is indicated at 8'.
  • the main portion of this section has a substantially plane profile with opposite edge portions 9 and '10 which extend downwards and inwards as shown in FIG. 3. Underneath the main flat portion, a
  • the section is also provided with a depending central stiffening web 12 and with a plurality of depending support projections, 13
  • edge portions 9 and 10 are provided with various projections forming grooves 14 for a purpose hereinafter to be explained.
  • the number of the rear support projections, 13a, 13b, 13c, 13d, Be, and 13f could if desired, be limited to a smaller number such as four for example, but the greater number provided in this example can increase the possible adaptability'of the staircase.
  • a series of regularly spaced pairs of holes, 15 and 15' through the outer and inner side walls 4' and 4 respectively are drilled in positions appropriate to the angle to be adopted for the staircase.
  • the holes 15 in the outer walls 4' are of greater diameter than the holes 15' in the inner wall 4".
  • the holes 15 are adapted to receive tube parts 16 which serve as supports for the step members 8.
  • Each tube part received in a hole 15 lies inside the slide member 4 and its end abuts the inner wall 4 opposite the corresponding hole 15', and a bolt 17 is introduced through the latter.
  • the bolt 17 extends through the tube part 16 and projects at the opposite end where it is fitted with a washer l8 engaging the tube part, with a tube clamping nut 19, with a step fixing clamp member 20 and with a fixing nut 21.
  • the stop members 8 are each mounted on the support tube parts 16 in the following manner.
  • the rear edge 10 of the step member 8 is hooked around a pair of opposed tube parts 16 which project from the stringers forming opposite sides of the stairway and which are mounted in the lower slide members 4 of the latter.
  • the front edge 9 of the step member is then applied over a pair of corresponding opposed tube parts 16 which are mounted in the upper slide members 4 of the stringers, in such a manner that these tube parts fit between flanges l l, 11', of the step member.
  • a good seating of the step member is obtained by the support porjections 13 and 13a, 13b, 13c, 13d, 13s and 13f which contact the tube parts.
  • the tube parts in the lower slide members 4 are confined, as shown in FIG. 3, between the rear support projections and the folded lower portion of the rear edge 10. According to the inclination of the stringers 1, those lower tube parts can occupy a different position within the rear folded portion of the step member and contact difierent projections of the series 13a, 13b, 13c, 13d, 13e and 13f.
  • Clamping of the step members 8 on the supporting tube parts 16 between the stringers is achieved by means of the members 20 and the nuts 21, cut-outs or apertures to allow positioning of the members 20 being provided in the flanges 11, 11' and also in'the folded lower portion of the rear edge 10. A clamping of the step members is thereby achieved externally to the stringers.
  • plates may then be placed beneath the step members and also, to form risers, between adjacent step members, said plates being fitted into the appropriate grooves 14 (as indicated by the thick broken lines in FIG. 3) thereby to obtain a well-closed stairway assembly.
  • the underside closure plates may be supported towards the middle by the web portion 12.
  • the top main portions providing the tread of the step members can be provided with a non-slip surface as indicated at 8'. This may be formed in extruding the section or it may be added subsequently.
  • each of the stringer members 1 can be provided with a plurality of regularly spaced apertures 22 for the fitting of balustrade rails.
  • a staircase assembly of prefabricated components composed of a plurality of extruded sections cut to predetermined lengths to provide structural members ap intestinalte to the size of the staircase, said assembly comprising a pair of stringers or side members each comprising one of said extruded sections having a hol low cross-section in the shape of a figure 8 and each having mounted on an inner side wall a pair of longitudinal members comprising another of said extruded sections, each longitudinal member having therein means defining a plurality of holes at predetermined positions determined by the staircase angle adopted, a plurality of projecting elements each disposed in one of said holes, each projecting element of one longitudinal member coacting with a projecting element of the other longitudinal member to provide a pair of supports, a step member comprising a further one of said extruded sections extending between said pair of stringers or side members and supported-by said projecting elements, said step member having means for adapting itself to the distance between said pair of projecting elements comprising said pair of supports.
  • a staircase in accordance with claim 1 including means defining a pair of slideways in each stringer of said pair of stringers, one slideway disposed near the top of said stringer and the other slideway disposed near the bottom of said stringer, and wherein said longitudinal members are each mounted in one slideway.
  • a staircase in accordance with claim 1, wherein said projecting elements comprise tube parts inserted into said holes in said longitudinal members.
  • a staircase in accordance with claim 5, including a bolt extending through said tube parts forming the supporting projecting elements, said bolt having a head end disposed adjacent the respective longitudinal member and an opposite end projecting from the end of the tube part under the step member, said opposite end having a clamping or fixing member for engaging said step member.
  • a staircase in accordance with claim 4 including means defining a plurality of support members projecting from the underside of said step member near the rear edge portion of said step member, each support member having means contactable in supporting relationship with one of said supporting tube parts.
  • a staircase in accordance with claim 3 including means in the front and rear edge portions of each said step member defining a plurality of grooves for receiving therein closure plates for closing the underside of the step member and for providing risers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)
US00202082A 1970-12-22 1971-11-26 Prefabricated metal staircase Expired - Lifetime US3765137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE760720A BE760720A (fr) 1970-12-22 1970-12-22 Escalier metallique prefabrique.

Publications (1)

Publication Number Publication Date
US3765137A true US3765137A (en) 1973-10-16

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ID=3857470

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Application Number Title Priority Date Filing Date
US00202082A Expired - Lifetime US3765137A (en) 1970-12-22 1971-11-26 Prefabricated metal staircase

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US (1) US3765137A (forum.php)
AT (1) AT319561B (forum.php)
AU (1) AU458505B2 (forum.php)
BE (1) BE760720A (forum.php)
CA (1) CA945730A (forum.php)
ES (1) ES397362A1 (forum.php)
FR (1) FR2114749A5 (forum.php)
GB (1) GB1315738A (forum.php)
IL (1) IL38225A (forum.php)
NL (1) NL7117705A (forum.php)
NO (1) NO128034B (forum.php)
SE (1) SE379078B (forum.php)
ZA (1) ZA717851B (forum.php)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315389A (en) * 1979-02-09 1982-02-16 Loix Gilbert Self-supporting outer metallic stairway
US4959935A (en) * 1989-09-25 1990-10-02 Stob H Richard Adjustable stairway
DE9106940U1 (de) * 1991-06-06 1991-07-25 RK Rose + Krieger GmbH & Co KG Verbindungs- und Positioniersysteme, 4952 Porta Westfalica Aus Leichtmetall bestehender Seitenholm für eine Treppe
US5890330A (en) * 1994-07-18 1999-04-06 Lesage; Gilles Adjustable staircase
US6256946B1 (en) 1999-10-04 2001-07-10 Jack Kennedy Metal Products And Buildings, Inc. Adjustable stairway for use with an overcast in a mine
US20040060247A1 (en) * 2002-10-01 2004-04-01 Berndt, Fred P. Wooden hand rail and support
US20080279624A1 (en) * 2007-05-08 2008-11-13 Confer Plastics, Inc. Secure interlocking system for plastic materials
US20130000231A1 (en) * 2010-03-10 2013-01-03 Kee Safety Limited Walkway assembly
WO2013029107A1 (en) * 2011-08-30 2013-03-07 Easy Stairs Pty Ltd A set of stairs
US20130239496A1 (en) * 2010-10-27 2013-09-19 Beckm, Llc Stair System
CN104963500A (zh) * 2015-06-30 2015-10-07 中国一冶集团有限公司 易于拆装的建筑脚手架楼梯及其搭设方法
AT16919U1 (de) * 2020-01-08 2020-12-15 H U J Steiner Ges M B H Bausatztreppe und modulares treppensystem
US10988938B2 (en) * 2019-01-28 2021-04-27 Safesmart Llc Self-leveling platform stairs

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1595202A (en) * 1977-07-06 1981-08-12 Abru Aluminium Ltd Ladders
EP0014694B1 (fr) * 1979-02-09 1983-01-05 Gilbert Loix Escalier métallique extérieur autoportant
DE8711358U1 (de) * 1987-06-30 1987-10-08 Plako Gmbh, Thermoplastik Und Formenbau, 5828 Ennepetal Treppenstufe
FI96530C (fi) * 1989-10-04 1996-07-10 Juha Riihimaeki Kääntöporras
DE29718467U1 (de) * 1997-10-17 1998-02-12 Peter Maier Leichtbau GmbH, 78224 Singen Treppe
FR2844537B1 (fr) * 2002-09-18 2008-12-05 Tubesca Dispositif de liaison des marches aux montants d'un escalier, notamment d'une passerelle pour pietons et escalier ou passerelle pour pietons ainsi equipes
FR3107715B1 (fr) 2020-02-27 2022-01-21 Profils Systemes Sas Nouvel escalier

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US538145A (en) * 1895-04-23 Combined display
US1593360A (en) * 1926-01-14 1926-07-20 Richmond Hiram Warren Stair structure
US1676317A (en) * 1926-02-01 1928-07-10 George L Bennett Metallic stairway
US3150742A (en) * 1961-03-27 1964-09-29 Carter Lavoy Adjustable walkway structure for use as a bridge, stairs, ramp, or the like
US3367444A (en) * 1966-05-31 1968-02-06 Olin Mathieson Adjustable stairway
US3608256A (en) * 1967-12-01 1971-09-28 Reynolds Metals Co Step construction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US538145A (en) * 1895-04-23 Combined display
US1593360A (en) * 1926-01-14 1926-07-20 Richmond Hiram Warren Stair structure
US1676317A (en) * 1926-02-01 1928-07-10 George L Bennett Metallic stairway
US3150742A (en) * 1961-03-27 1964-09-29 Carter Lavoy Adjustable walkway structure for use as a bridge, stairs, ramp, or the like
US3367444A (en) * 1966-05-31 1968-02-06 Olin Mathieson Adjustable stairway
US3608256A (en) * 1967-12-01 1971-09-28 Reynolds Metals Co Step construction

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4315389A (en) * 1979-02-09 1982-02-16 Loix Gilbert Self-supporting outer metallic stairway
US4959935A (en) * 1989-09-25 1990-10-02 Stob H Richard Adjustable stairway
DE9106940U1 (de) * 1991-06-06 1991-07-25 RK Rose + Krieger GmbH & Co KG Verbindungs- und Positioniersysteme, 4952 Porta Westfalica Aus Leichtmetall bestehender Seitenholm für eine Treppe
US5890330A (en) * 1994-07-18 1999-04-06 Lesage; Gilles Adjustable staircase
US6256946B1 (en) 1999-10-04 2001-07-10 Jack Kennedy Metal Products And Buildings, Inc. Adjustable stairway for use with an overcast in a mine
US20040060247A1 (en) * 2002-10-01 2004-04-01 Berndt, Fred P. Wooden hand rail and support
US20080279624A1 (en) * 2007-05-08 2008-11-13 Confer Plastics, Inc. Secure interlocking system for plastic materials
US7578632B2 (en) * 2007-05-08 2009-08-25 Confer Plastics, Inc. Secure interlocking system for plastic materials
US20130000231A1 (en) * 2010-03-10 2013-01-03 Kee Safety Limited Walkway assembly
US9376820B2 (en) * 2010-03-10 2016-06-28 Kee Safety Limited Walkway assembly
US20130239496A1 (en) * 2010-10-27 2013-09-19 Beckm, Llc Stair System
US9422726B2 (en) * 2010-10-27 2016-08-23 Beckm, Llc Stair system
WO2013029107A1 (en) * 2011-08-30 2013-03-07 Easy Stairs Pty Ltd A set of stairs
CN104963500A (zh) * 2015-06-30 2015-10-07 中国一冶集团有限公司 易于拆装的建筑脚手架楼梯及其搭设方法
US10988938B2 (en) * 2019-01-28 2021-04-27 Safesmart Llc Self-leveling platform stairs
AT16919U1 (de) * 2020-01-08 2020-12-15 H U J Steiner Ges M B H Bausatztreppe und modulares treppensystem

Also Published As

Publication number Publication date
BE760720A (fr) 1971-05-27
AU458505B2 (en) 1975-02-12
FR2114749A5 (forum.php) 1972-06-30
SE379078B (forum.php) 1975-09-22
IL38225A (en) 1974-07-31
NO128034B (forum.php) 1973-09-17
CA945730A (en) 1974-04-23
ZA717851B (en) 1972-08-30
AT319561B (de) 1974-12-27
IL38225A0 (en) 1972-01-27
ES397362A1 (es) 1975-10-16
GB1315738A (en) 1973-05-02
AU3626971A (en) 1973-06-07
NL7117705A (forum.php) 1972-06-26

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