US20100293875A1 - Stairway for Use on Building Sites - Google Patents

Stairway for Use on Building Sites Download PDF

Info

Publication number
US20100293875A1
US20100293875A1 US12/308,537 US30853707A US2010293875A1 US 20100293875 A1 US20100293875 A1 US 20100293875A1 US 30853707 A US30853707 A US 30853707A US 2010293875 A1 US2010293875 A1 US 2010293875A1
Authority
US
United States
Prior art keywords
run section
stair run
stair
building
landings
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.)
Abandoned
Application number
US12/308,537
Other languages
English (en)
Inventor
John Clement Preston
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.)
Individual
Original Assignee
Individual
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
Priority claimed from AU2006903316A external-priority patent/AU2006903316A0/en
Application filed by Individual filed Critical Individual
Publication of US20100293875A1 publication Critical patent/US20100293875A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G27/00—Temporary arrangements for giving access from one level to another for men or vehicles, e.g. steps, ramps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
    • B64F1/00—Ground or aircraft-carrier-deck installations
    • B64F1/30—Ground or aircraft-carrier-deck installations for embarking or disembarking passengers
    • B64F1/315—Mobile stairs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • 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

Definitions

  • the present invention relates to stairs, in particular to stairways suitable for temporary erection and use on a building site during construction of a building.
  • Temporary stairways are often required on building sites during construction of a multistorey building to allow construction workers to move from one storey of the building to another.
  • U.S. Pat. No. 3,684,057 discloses a portable stairway comprised of step-ladder-like sections which are releasably lockably mounted onto outrigger supports which in turn are releasably lockably secured to the scaffolding's upright struts.
  • Safety side guard rails are hingedly attached to supporting posts which in turn are pivotedly mounted to the step-ladder side frame members.
  • the rise and tread of each individual step may be fixed such that the rise shall not exceed 215 mm, whereas the tread shall not have an extension of less than 215 mm; industry practice is to use stair rise to tread ratio formulae in making the stair run sections.
  • stairway units should be modular in layout and incorporate or use fastening or fixing structures that allow the stairway unit to be temporarily secured at one building location and be easily removed for deployment at a different location.
  • a portable, modular stairway unit for use on a building site during construction of a multistorey building, the stairway unit including:
  • a stair run section with a plurality of rise-separated stair treads, the stair run section having an upper and a lower end;
  • each of the landings have portions that extend laterally beyond a width of the stair run section, the landings being devised to extend inwardly into respective upper and lower storey levels of the building when the stairway unit is situated adjacent to a face of the building; and anchoring means arranged to removeably secure the landings, in use, at the upper and lower storey levels thereby to provide a double-cantilevered mounting of the stair run section extending between the two storey levels.
  • Modular stairways in accordance with the present invention achieve significant cost savings with regards to erection time given that the stairway can be positioned as a pre-assembled unit at an outside location adjacent to the building face, whereupon suitable anchoring of the landings at the upper and lower storeys secure the stairway module in place.
  • At least one of the landings is pivotably secured to the stair run section, to allow the incline of the stair run section, when in use, to be varied. More preferably, each of the landings is hinged to the stair run section, as this will allow the landings to be folded back onto the step section for ease of transport, when the stairway module is not in use.
  • Stairway embodiments incorporating landings that are articulated or hinged at both an upper and lower end of the stair run section allow deployment and use of the same stairway unit at buildings having storey heights (ie distance between floor to floor of adjoining storeys of the building) that vary within a predefined narrow range.
  • some multilevel buildings incorporate floor levels with varying floor to ceiling heights, eg lower levels having a floor to ceiling height of 2,700 mm, whereas upper floor levels might have an increased floor-ceiling height of eg 2,900 mm.
  • At least one of the landings is secured to the stair run section in such a manner as to allow linear movement along a longitudinal axis of the stair run section, and further including fixing means to secure the landing at a desired position along the stair run section, whereby a distance between the upper and lower landings at the stair run section can be varied and fixed in a desired position.
  • the lower landing is arranged to be held at a fixed angle of inclination with respect to the longitudinal axis of the stair run section, such that the tread and rise of each step are allowed to remain horizontal and vertical, respectively, as the stair run section is moved relative to the landing.
  • the stair run section is devised with a plurality of treads whose incline with respect to the longitudinal axis of the stair run section may be selectively varied and fixed in such a manner that the treads will remain substantially horizontal irrespective of the angle of incline which the stair run section has when extending between adjacent building storeys.
  • the variation of step tread incline is preferentially achieved by providing a linkage mechanism articulating the individual treads to one another in such a manner that variation of the incline angle of the stair run section will resolve in self-adjustment of the treads into a horizontal attitude.
  • the present invention contemplates use of known adjustable stair run section construction principles as illustrated in the aforementioned U.S. patents of Cornell, Lister, Mason and others.
  • the anchoring means are provided by adjustable-height props arranged for loading in compression when extending between the floor and ceiling of a respective storey where the respective landing is to be secured.
  • Use of compression props rather than more conventional anchoring bolts, hooks and loops avoids damage to the building structure, as there is no need to drill into the building structure to provide a fixing point or attachment for the landings of the modular stairway unit.
  • Height adjustable props are known in the construction industry for securing form work prior to and subsequent to casting of building storey slabs. It should be noted, however, that conventional fasteners such as bolts can also be used, eg to temporarily secure the landings in deploying the modular stairway.
  • FIG. 1 is a schematic side view of a modular stairway according to one embodiment of the present invention, installed against an exterior face of and between two storeys of a building;
  • FIG. 2 is a top view along direction of arrow II of the stairway of FIG. 1 ;
  • FIG. 3 is an end view along direction of arrow III of the stairway of FIG. 1 ;
  • FIG. 4 is a side view of the stairway of FIG. 1 when in a transport or non-deployed position;
  • FIG. 5 is a schematic, partial side view, of a height adjustable, modular stairway in accordance with another embodiment of the present invention.
  • FIG. 1 shows a modular stairway unit 10 in position at the external face and between an upper storey 12 and a lower storey 14 of a building.
  • the modular stairway unit 10 consists of an upper landing 16 , a lower landing 18 , a stair run section 20 extending between and connected to the landings 16 , 18 and four anchoring members 22 a to 22 d per landing as described in more detail below.
  • the stair run section 20 essentially includes a plurality of individual treads 24 in the form of boards, with optional risers 26 extending therebetween.
  • the treads 24 are suitably secured and supported at their widthward ends at opposed, tread support bar panels (not shown) in a known manner, for example, that described in U.S. Pat. No. 3,788,028.
  • a tread-rise adjustable stair run assembly can be employed, such as that described in U.S. Pat. No. 3,593,821 or U.S. Pat. No. 4,768,617, allowing, of course, for the necessary modifications required for incorporation of such type of adjustable stair run assemblies into the concept of the present invention.
  • FIG. 1 also illustrates schematically at 28 safety fence structures which are secured to each widthward side of the stair run section 20 , thereby providing added security to users of the modular stairway unit; a conventional hand rail can be replaced.
  • the stair run section 20 is manufactured and assembled from materials and components commonly used in portable stairway manufacture.
  • the components are made from sheet and section steel, allowing the stairway 10 to be weatherproof and strong enough to withstand significant loads as experienced during building construction.
  • the two landings 16 , 18 essentially rectangular steel plates, each have a portion, identified at 16 a , 18 a , respectively, that protrudes to one side in widthward extension beyond the width of the stair run section 20 , ie the landings have outrigger portions that serve to secure the stairway 10 to a building.
  • the landing portions 16 a , 18 a extend into the building in substantially coplanar horizontal relation with the floor 12 a , 14 a of the respective floor levels 12 and 14 .
  • Both the upper and lower landings 16 , 18 are secured in articulated manner (eg using axle hinges) to the upper and lower ends of the stair run section 20 , respectively, thereby allowing the entire modular unit to be deployed between building storeys having varying floor 14 a to ceiling 14 b heights, whilst maintaining horizontal orientation of the lower and upper landings, 18 , 16 , respectively. It will be appreciated that, depending on the height between ceiling and floor, the inclination angle (i) of the stair run section 20 varies.
  • the entire modular stairway 10 is removably secured such as to be cantilevered at two locations, namely the upper and lower floors 12 , 14 by means of a total of eight longitudinally adjustable compression props 22 a to 22 d of such type as commonly employed in the building trade, for example screw props.
  • the props 22 a to 22 c consist essentially of a tubular strut with plate footings at the lower terminal end, the opposite upper hollow end of the prop tubes having an internal tread into which externally threaded stems of prop headers are inserted. It is preferred to have the mechanism which allows height adjustment (and tensioning/wedging) of the props to be located at the upper end (header) of the units, to prevent accidental de-tensioning of the props during use of the stairway.
  • a total of four props 22 a to 22 d is provided per landing 16 , 18 , thereby providing a stable anchoring arrangement at the bottom and top of the stairway unit at the building levels, whereby one prop each is situated close to the corners of the landing platform sections 16 a , 18 a , thereby to ensure potential bending and deformation of the landings due to the weight of the stairway or the load on the stairway being minimised.
  • the entire arrangement creates a double-cantilever mount of the stair run section 20 at the building.
  • the individual props can be secured to the landings 16 , 18 in a known manner, for example by passing the props through suitably dimensioned through holes in the platforms, and then securing the relative position of the platforms 16 , 18 with respect to the tubular prop struts. It is preferred that the props will be welded to the landings during manufacture of the system, to provide a wholly pre-fabricated unit to minimise erection times. It will be immediately appreciated that using props to secure and fix/anchor the modular stairway unit 10 between building storeys makes installation of the entire unit location independent, since there is no need to provide for fixed anchoring/fixing locations in the building structure, for example in the floor slabs.
  • each landing is provided with a L-shaped fence structure 30 , 32 on the sides facing away from the building, thereby to ensure safety of the users of the stairway unit, whereby it is noted that the fence 30 , 32 extends into the building storeys once the unit is mounted and secured in place.
  • FIG. 4 shows the modular stairway in a transport position, where the stair run section 20 extends parallel and horizontal with the landings 16 and 18 , thereby facilitating transport of the modular stairway unit on a flatbed truck.
  • the modular, articulated construction of the stairway unit 10 enables the unit to be transported in pre-assembled manner to the building site, where a crane lift may be used to hoist the unit into place at the exterior face of the building.
  • the stair run section 20 is of such type having height adjustable treads to allow use of the same modular unit 10 for varying floor level heights.
  • the hinged arrangement of the top and bottom landings 16 , 18 at either end of the stair run section 20 itself is capable of providing a certain degree of adjustability to different floor level heights (within construction tolerances) given that a change in the angle of inclination (i) of the stair run's incline position, where the treads are essentially horizontal, can be varied by a certain amount without making the entire stairway unit unsafe.
  • the widths and angles of the treads and the distances between the treads should preferably abide by relevant building code or standards.
  • the Australian Standard AS 1657-1992 states that stairways shall not be less than 600 mm wide, and the angle of slope of the stairway should not be less than 26.5 degrees and not greater than 45 degrees, height of each rise shall be between 150 mm-215 mm, and length of each tread shall be between 215 mm-305 mm.
  • FIG. 5 illustrates a modified embodiment of that illustrated in FIGS. 1 to 4 . Similar reference numerals are used in FIG. 5 to refer to similar components, which will thus not be described in further detail here.
  • the upper landing 16 is hinged to the upper end of stair run section 20 , thereby allowing variation of the angle (ii) between the platform 16 and the notional longitudinal plane (or axis) of section 20 .
  • the lower landing 18 is secured to the stair run section 20 in such a manner as to allow displacement along the longitudinal axis of section 20 whilst maintaining a generally horizontal attitude of the landing platform 18 .
  • the landing platform 18 is provided with a support section 32 defining a sleeve in which the lower terminal end of the stair run section 20 is received for sliding engagement therewith, thereby allowing the entire platform structure 18 to be moved up and down along arrows (iii) along the length of unit 20 .
  • Sleeve member 32 is suitably attached to the side plates or bars 34 of stair run section 20 , wherein a roller connected to the landing 18 is positioned to allow the landing 18 to move relative to and along bar members 34 .
  • the landing 18 is at a desired position, it is immobilised with respect and fixed to the stair run section 20 , for example using nut and bolt clamps, locating pins or bolts, etc.
  • a series of holes 36 are present in the side bars of 34 stair run section 20 at different positions, wherein a bolt is inserted through the support section 32 and into at least one hole 36 , thereby securing the landing 18 in the desired position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)
  • Ladders (AREA)
  • Movable Scaffolding (AREA)
US12/308,537 2006-06-20 2007-06-20 Stairway for Use on Building Sites Abandoned US20100293875A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2006903316 2006-06-20
AU2006903316A AU2006903316A0 (en) 2006-06-20 Stairway For Use On Building Sites
PCT/AU2007/000863 WO2007147210A1 (en) 2006-06-20 2007-06-20 Stairway for use on building sites

Publications (1)

Publication Number Publication Date
US20100293875A1 true US20100293875A1 (en) 2010-11-25

Family

ID=38832999

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/308,537 Abandoned US20100293875A1 (en) 2006-06-20 2007-06-20 Stairway for Use on Building Sites

Country Status (12)

Country Link
US (1) US20100293875A1 (pt)
EP (1) EP2029835A4 (pt)
JP (1) JP2009541612A (pt)
KR (1) KR20090028716A (pt)
CN (1) CN101473097A (pt)
AU (1) AU2007262663A1 (pt)
BR (1) BRPI0713495A2 (pt)
CA (1) CA2655377A1 (pt)
RU (1) RU2009101481A (pt)
TW (1) TW200809061A (pt)
WO (1) WO2007147210A1 (pt)
ZA (1) ZA200810634B (pt)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130006446A1 (en) * 2011-06-28 2013-01-03 Samsung Electronics Co., Ltd. Step climbing device for moving robots, step climbing system for moving robots and step climbing method of moving robot
WO2013152389A1 (en) * 2012-04-12 2013-10-17 Natform Pty Ltd Screen module
US9561398B2 (en) * 2015-03-13 2017-02-07 Healthstream Taiwan Inc. Incline angle adjustable stair climbing machine
US9758981B2 (en) 2014-10-14 2017-09-12 Emeh, Inc. Stair expansion joint system with freedom of movement between landings
US9869084B2 (en) * 2014-10-14 2018-01-16 Emeh, Inc. Stair expansion joint system with freedom of movement between landings
US10364575B2 (en) * 2017-05-02 2019-07-30 Cheng-Yu Ho Elevation-type stair structure
WO2020005560A1 (en) * 2018-06-28 2020-01-02 Emeh, Inc. Rotational connections for stairs
US20200199881A1 (en) * 2015-08-11 2020-06-25 Zev BIANCHI Retractable staircase
US10745919B1 (en) * 2019-07-26 2020-08-18 Big Time Investment, Llc Method and apparatus for installing a staircase assembly into a building
US10968636B2 (en) * 2017-05-15 2021-04-06 Emeh, Inc. Moveable stair systems and methods
US20220235562A1 (en) * 2021-01-26 2022-07-28 Commercial Scaffolding Companies, Inc. Scaffolding stair system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102363483A (zh) * 2011-06-29 2012-02-29 苏州新达电扶梯部件有限公司 一种电梯护栏斜挡板
CN105600176A (zh) * 2015-10-20 2016-05-25 张跃 梯板运组
CN112081320A (zh) * 2020-08-27 2020-12-15 衡东县佳时鸿丰建材有限责任公司 一种可调节式木楼梯及其使用方法
FR3127183A1 (fr) * 2021-09-22 2023-03-24 Speedinnov Dispositif d’ajustement d’un escalier entre deux étages d’une structure

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299590A (en) * 1964-06-01 1967-01-24 Carter Lavoy Prefabricated, adjustable stairway, ramp or bridge
US3593821A (en) * 1969-12-22 1971-07-20 Unit Step Farm Co Inc Adjustable stairstep unit
US3626438A (en) * 1969-12-15 1971-12-07 Ozark Metal Products Inc Adjustable stairs
US3684057A (en) * 1971-06-04 1972-08-15 Horace Eppinette Portable stairway
US3856110A (en) * 1973-01-30 1974-12-24 Welin Ab Ships accomodation ladder
US4363150A (en) * 1978-03-17 1982-12-14 Ab Welin Ship's embarkation device
US4606431A (en) * 1984-03-19 1986-08-19 Ruder Sr Fred A Evacuation slides for multi-story buildings
US4642953A (en) * 1986-02-10 1987-02-17 Degood David A Moveable stair apparatus
US4768617A (en) * 1987-07-16 1988-09-06 Wenger Corporation Adjustable stairway having retractable wheel carriage
US4971168A (en) * 1988-04-01 1990-11-20 Stanescu Georgel V Boat side-ladder
US5189854A (en) * 1992-09-14 1993-03-02 The United States Of America As Represented By The Secretary Of The Army Adjustable height stairway
US6003270A (en) * 1998-04-16 1999-12-21 Macintyre; James R. Variable riser seating system
US6527081B1 (en) * 2001-05-30 2003-03-04 Aluminum Ladder Company, Embankment stairway
US6691828B1 (en) * 2000-11-08 2004-02-17 Deltak Manufacturing, Inc. Scaffold stair
US20040231919A1 (en) * 2003-05-23 2004-11-25 Interstate Equipment Corporation Portable barge access ladder
US20050097835A1 (en) * 2001-12-28 2005-05-12 Tsuyoshi Nishimoto Stairway
US6923140B1 (en) * 2004-03-03 2005-08-02 Aluminum Ladder Company Boat access stairway
US7377080B2 (en) * 2004-03-29 2008-05-27 The Boeing Company Stowable spiral staircase system for overhead space access
US20080190049A1 (en) * 2007-02-08 2008-08-14 David Muti Portable construction staircase

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPN087395A0 (en) * 1995-01-31 1995-02-23 Preston, John Clement Suspendable container
DE10307087B4 (de) * 2003-02-19 2009-07-09 Pröbst, Christian Bautreppe

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299590A (en) * 1964-06-01 1967-01-24 Carter Lavoy Prefabricated, adjustable stairway, ramp or bridge
US3626438A (en) * 1969-12-15 1971-12-07 Ozark Metal Products Inc Adjustable stairs
US3593821A (en) * 1969-12-22 1971-07-20 Unit Step Farm Co Inc Adjustable stairstep unit
US3684057A (en) * 1971-06-04 1972-08-15 Horace Eppinette Portable stairway
US3856110A (en) * 1973-01-30 1974-12-24 Welin Ab Ships accomodation ladder
US4363150A (en) * 1978-03-17 1982-12-14 Ab Welin Ship's embarkation device
US4606431A (en) * 1984-03-19 1986-08-19 Ruder Sr Fred A Evacuation slides for multi-story buildings
US4642953A (en) * 1986-02-10 1987-02-17 Degood David A Moveable stair apparatus
US4768617A (en) * 1987-07-16 1988-09-06 Wenger Corporation Adjustable stairway having retractable wheel carriage
US4971168A (en) * 1988-04-01 1990-11-20 Stanescu Georgel V Boat side-ladder
US5189854A (en) * 1992-09-14 1993-03-02 The United States Of America As Represented By The Secretary Of The Army Adjustable height stairway
US6003270A (en) * 1998-04-16 1999-12-21 Macintyre; James R. Variable riser seating system
US6691828B1 (en) * 2000-11-08 2004-02-17 Deltak Manufacturing, Inc. Scaffold stair
US6527081B1 (en) * 2001-05-30 2003-03-04 Aluminum Ladder Company, Embankment stairway
US20050097835A1 (en) * 2001-12-28 2005-05-12 Tsuyoshi Nishimoto Stairway
US20040231919A1 (en) * 2003-05-23 2004-11-25 Interstate Equipment Corporation Portable barge access ladder
US6923140B1 (en) * 2004-03-03 2005-08-02 Aluminum Ladder Company Boat access stairway
US7377080B2 (en) * 2004-03-29 2008-05-27 The Boeing Company Stowable spiral staircase system for overhead space access
US20080190049A1 (en) * 2007-02-08 2008-08-14 David Muti Portable construction staircase

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130006446A1 (en) * 2011-06-28 2013-01-03 Samsung Electronics Co., Ltd. Step climbing device for moving robots, step climbing system for moving robots and step climbing method of moving robot
WO2013152389A1 (en) * 2012-04-12 2013-10-17 Natform Pty Ltd Screen module
AU2013203442B2 (en) * 2012-04-12 2015-01-22 Natform Pty Ltd Screen Module
US10584480B2 (en) * 2014-10-14 2020-03-10 Emeh, Inc. Stair expansion joint system with freedom of movement between landings
US9758981B2 (en) 2014-10-14 2017-09-12 Emeh, Inc. Stair expansion joint system with freedom of movement between landings
US9869084B2 (en) * 2014-10-14 2018-01-16 Emeh, Inc. Stair expansion joint system with freedom of movement between landings
US20180100301A1 (en) * 2014-10-14 2018-04-12 Emeh, Inc. Stair expansion joint system with freedom of movement between landings
US9561398B2 (en) * 2015-03-13 2017-02-07 Healthstream Taiwan Inc. Incline angle adjustable stair climbing machine
US10889993B2 (en) * 2015-08-11 2021-01-12 Zev BIANCHI Retractable staircase
US20200199881A1 (en) * 2015-08-11 2020-06-25 Zev BIANCHI Retractable staircase
US11408180B2 (en) 2015-08-11 2022-08-09 Zev BIANCHI Retractable staircase
US10364575B2 (en) * 2017-05-02 2019-07-30 Cheng-Yu Ho Elevation-type stair structure
US10968636B2 (en) * 2017-05-15 2021-04-06 Emeh, Inc. Moveable stair systems and methods
US11332940B2 (en) 2017-05-15 2022-05-17 Emeh, Inc. Moveable stair systems and methods
WO2020005560A1 (en) * 2018-06-28 2020-01-02 Emeh, Inc. Rotational connections for stairs
US11332923B2 (en) 2018-06-28 2022-05-17 Emeh, Inc. Rotational connections for stairs
US10745919B1 (en) * 2019-07-26 2020-08-18 Big Time Investment, Llc Method and apparatus for installing a staircase assembly into a building
US20220235562A1 (en) * 2021-01-26 2022-07-28 Commercial Scaffolding Companies, Inc. Scaffolding stair system

Also Published As

Publication number Publication date
WO2007147210A1 (en) 2007-12-27
CN101473097A (zh) 2009-07-01
KR20090028716A (ko) 2009-03-19
ZA200810634B (en) 2009-08-26
JP2009541612A (ja) 2009-11-26
RU2009101481A (ru) 2010-07-27
EP2029835A1 (en) 2009-03-04
CA2655377A1 (en) 2007-12-27
AU2007262663A1 (en) 2007-12-27
EP2029835A4 (en) 2010-08-18
BRPI0713495A2 (pt) 2012-01-24
TW200809061A (en) 2008-02-16

Similar Documents

Publication Publication Date Title
US20100293875A1 (en) Stairway for Use on Building Sites
US7971408B2 (en) Stairtower and method for erecting the same
AU2011220341B2 (en) Scaffolding
CA2567141A1 (en) Modular multilevel access platform and method for erecting the same
US6527081B1 (en) Embankment stairway
US3927518A (en) Site assembled multi-story stair
NL9300044A (nl) Universele afsteunconstructie.
US5492197A (en) Frame parts for temporary ladder
AU2021215192B2 (en) Temporary Stairway with Void Cover
KR20100055605A (ko) 개량형 조립식 계단
EP1206611A1 (en) Scaffolding
JP3981604B2 (ja) 仮設階段用踊り場
EP3957807B1 (en) A scaffolding support structure and a method for assembling scaffolding
RU2022117C1 (ru) Лестница-стремянка для строительно-монтажных работ
AU2017100527A4 (en) A portable adjustable staircase
CA2980829A1 (en) Roof scaffolding system
NZ336959A (en) Scaffolding
FI130533B (en) Scaffolding system resting on the ground
Champion Access Scaffolding
AU2006202497B2 (en) A Scaffolding Assembly
JPH0620779U (ja) スライド式仮設階段
JP3477256B2 (ja) 渡り足場構造
KR200367391Y1 (ko) 발코니의 가설용 조립식 난간
JP2021130952A (ja) 防護構台およびその構築方法
JPH09268756A (ja) 踊場付き仮設階段、及び踊場付き仮設階段の立坑内での多段構築方法

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION