EP0713942A1 - Vorläufige Treppe mit Podest und Anwendungsverfahren - Google Patents

Vorläufige Treppe mit Podest und Anwendungsverfahren Download PDF

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Publication number
EP0713942A1
EP0713942A1 EP95118316A EP95118316A EP0713942A1 EP 0713942 A1 EP0713942 A1 EP 0713942A1 EP 95118316 A EP95118316 A EP 95118316A EP 95118316 A EP95118316 A EP 95118316A EP 0713942 A1 EP0713942 A1 EP 0713942A1
Authority
EP
European Patent Office
Prior art keywords
stairway
scaffolding
landing floor
beams
temporary
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Withdrawn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
EP95118316A
Other languages
English (en)
French (fr)
Inventor
Yoshihiro c/o Japan Steels Int. Inc. Yonahara
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.)
Japan Steels International Inc
Original Assignee
Japan Steels International Inc
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 Japan Steels International Inc filed Critical Japan Steels International Inc
Publication of EP0713942A1 publication Critical patent/EP0713942A1/de
Withdrawn legal-status Critical Current

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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
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/10—Steps or ladders specially adapted for scaffolds
    • 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

Definitions

  • the present invention relates to a temporary stairway with a landings, which is used at a construction site, and a method for arrangement thereof.
  • Stairways are temporarily installed between scaffoldings at a construction site for ascent and descent.
  • stairways are installed to vertically connect scaffolding boards provided at specified intervals in parallel with each other in the direction of height.
  • a stairway is installed by removing scaffolding boards for one span between poles on the upper level.
  • stairways are installed to connect, for example, two floors with only one stairway by skipping intermediate levels.
  • a conventional stairway R is obliquely installed in a span between scaffolding poles, and a scaffolding board P in the next span different from said span bridged with the stairway is used as a landing.
  • Stairways between scaffoldings are used to connect the ground and the bottom of a pit. Scaffolding systems, between levels of which stairways are installed, have thus far been assembled from the bottom of a pit toward the ground.
  • Stairways temporarily installed between scaffoldings at a construction site are arranged to be positioned obliquely in a span between poles placed at specified intervals. Thus a stairway and landings connected to the upper and lower ends of the stairway cannot be installed together in a span.
  • a stairway with a landing is more preferably used together with, or incorporated into, an existing scaffolding system.
  • a conventional scaffolding system to be installed in a pit to connect the ground to the bottom of the pit is assembled upward, starting at the bottom layer the system. Consequently, as assembly progresses, operations performed high above the ground are increasingly required.
  • a temporary stairway with a landing which is installed in a scaffolding frame at a construction site, is disposed, frames formed by connecting the upper ends of four poles using beams are assembled together in a plurality of layers; scaffolding boards having a landing floor section and an open ceiling cutoff section adjacent to each other are horizontally bridged between beams opposite to each other at individual levels so that the landing floor sections of scaffolding boards at two adjacent levels are on opposite sides; the upper end of a stairway formed to have about half the width of the scaffolding board is connected to the end of the landing floor section of said scaffolding board at the level immediately above the stairway, which end is on the side of the open ceiling cutoff section; and the lower end of the stairway is placed on the landing floor section of the scaffolding board at the level immediately below the stairway or on the ground.
  • the scaffolding board is composed of a plurality of narrow scaffolding boards which can be bridged side by side between beams, and the plurality of narrow scaffolding boards have a landing floor section and an open ceiling cutoff section.
  • Hand rails are provided on the sides of at least either a landing floor section or the stairway.
  • a method for arranging a temporary stairway with a landing frames formed by connecting the upper and lower ends of four poles using beams are assembled together in an appropriate number of layers, scaffolding boards having a landing floor section and an open ceiling cutoff section adjacent to each other are horizontally bridged between beams opposite to each other at individual levels so that the landing floor sections of scaffolding boards at two adjacent levels are on opposite sides.
  • stairways are installed between the individual levels to assemble a prefabricated temporary stairway unit, the unit is suspended in a pit and secured to connecting beams around the opening of the pit so that the top of said prefabricated temporary stairway unit is near the ground.
  • poles are added to the bottom of said prefabricated temporary stairway unit secured and are connected using beams, a scaffolding board is bridged between the beams, a stairway is installed between the scaffolding board and that at the bottom of the prefabricated temporary stairway unit, and stairway layers are added one after another so that stairways are installed zigzag.
  • the scaffolding board and the stairway are formed to have about half the width of a layer, and a landing floor section is provided at least either the upper or the lower end of the stairway.
  • scaffolding boards having a landing floor section and an open ceiling cutoff section adjacent to each other are bridged between beams at a plurality of levels which connect the upper ends of four poles erected with a specified span provided therebetween.
  • the scaffolding boards are bridged between beams opposite to each other at individual levels so that the landing floor sections of the boards are alternately on opposite sides from level to level.
  • the stairway has about half the width of the scaffolding board, connecting the upper end of the stairway with the end of the landing floor section of the scaffolding board at the level immediately above the stairway, which end faces the open ceiling cutoff section of the scaffolding board and placing the lower end of the stairway on the landing floor section of the scaffolding board at the level immediately below the stairway allow stairways with landings to be vertically installed zigzag between levels.
  • the stairway can be installed between the ground and the second level by connecting the upper end of the stairway with the landing floor section of a scaffolding board in the second level and placing the lower end thereof on the ground.
  • the upper end of the stairway is connected with the landing floor section of a scaffolding board, while the lower end thereof is not fixed but only placed on the landing floor section of the scaffolding board immediately below the stairway or on the ground.
  • adjusting the position of the lower end of the stairway at will as appropriate allows the stairway to be installed to be steady. Installing hand rails on the sides of either the landing floor section or the stairway prevents workers from falling by accident from scaffoldings.
  • a stairway with a landing can be installed in a span between scaffolding poles. Installing as many scaffolding boards as necessary in parallel with each other in the direction of scaffolding system height allows stairways to be installed to a desired height.
  • a scaffolding board is composed of narrow scaffolding boards which can be bridged side by side between beams, each of the narrow scaffolding boards are provided with a landing floor section and an open ceiling cutoff section, the landing floor sections of narrow scaffolding boards at individual levels are made to adjoin each other, and the landing floor sections of scaffolding boards at adjacent levels are placed alternately on opposite sides, then stairways can be installed in the above-described way.
  • Using scaffolding boards composed of narrow scaffolding boards helps scaffolding board transport into a scaffolding system.
  • a prefabricated temporary stairway unit in an appropriate number of layers, completed on the ground, is inserted into a pit and fixed to a connecting beam between shore struts in the pit.
  • extension temporary stairway unit are added one by one to the bottom of the prefabricated temporary stairway unit.
  • the pit is excavated through the distance equivalent to the height of the unit. Because stairway installation is made at the bottom of the pit, dangerous operations performed high above the ground can be avoided, compared with a method wherein temporary stairways in a plurality of layers is assembled toward the ground, starting at the bottom of the pit.
  • Fig. 1 is a front view (a) and a side view (b) of a temporary stairway according to a first embodiment.
  • Fig. 2 is a front view (a) of narrow scaffolding boards according to the first embodiment bridged between beams and a perspective view (b) of a stairway.
  • Fig. 3 is a plan view of a scaffolding board according to a second embodiment.
  • Fig. 4 is front views (a), (b), (c), and (d) of a stairway according to a third embodiment, temporarily installed in four ways.
  • Fig. 5 is cross-sectional views (a), (b), (c), and (d) illustrating the procedure for an installation method according to a fourth embodiment.
  • Fig. 6 is a perspective view of a fitting secured to a connecting beam.
  • Fig. 7 is a perspective view of a stairway, at both ends of which landing floor sections are provided.
  • Fig. 8 is a perspective view of a stairway, at the lower end of which a landing floor section is provided.
  • Fig. 9 illustrates a conventional stairway.
  • two scaffolding boards having a landing floor section and an open ceiling cutoff section, which sections are adjacent to each other, are side by side bridged between beams connecting four poles for each level.
  • Poles 10 used in the first embodiment are arranged so that they can be extended in the lengthwise direction.
  • the materials for the poles 10 and the beams 20 and the dimensions and installation spacings of the poles and the beams are determined in accordance with conventional standards, but the dimensions and the spacings may be set longer for forming the landing floor section 40, compared with the conventional standards.
  • the poles and beams are made conform to the standards of conventional scaffolding members. Such designs allow temporary steps A of the present invention to be incorporated to an existing scaffolding system or to be installed in parallel with an existing scaffolding system.
  • a scaffolding 30 is composed of two substantially rectangular, narrow scaffolding boards 30a whose width and length are set to about 1/2 the length a of the beam 20 and to the span b between the poles 10, respectively, so that the two boards can be bridged between the beams 20.
  • a landing floor section 40 is provided at one lengthwise end of the narrow scaffolding board 30a.
  • the section of the narrow scaffolding board 30a except the landing floor section 40 is an open ceiling cutoff section 50.
  • the landing floor section 40 serves as a ⁇ landing ⁇ following the upper or lower end of a stairway 60, and the opening ceiling cutoff section 50 provides an opening through which a person goes up or down the stairway 60.
  • a hand rail 70 (or a fence) is detachably installed on three sides of the landing floor section 40.
  • Small fastening holes 41 which is used to place the upper end of the stairway 60, are formed at both ends of the edge of the landing floor section 40, which edge is faced with the opening ceiling cutoff section 50.
  • Substantially L-shaped fastening members 31 are provided at four corners of the narrow scaffolding board 30a so that the members can be bridged between the beams 20.
  • Two narrow scaffolding boards 30a are horizontally bridged between beams 20 installed each at a plurality of levels.
  • the narrow scaffolding boards 30a thus bridged at individual levels are spaced from each other at specified intervals to be in parallel layers in the direction of pole height.
  • the two narrow scaffolding boards 30a at a level are bridged so that their landing floor sections are positioned side by side.
  • Scaffoldings 30 at adjacent two levels are installed so that the scaffolding floor sections 40 of scaffolding boards constituting the scaffoldings are on opposite sides, causing the stairway 60 to be bridged zigzag between scaffolding floor sections 40 as described later.
  • jack bases 15 and braces are used; that is, jack bases are provided at the lower ends of the poles 10, and braces are disposed obliquely between the poles 10.
  • the stairway 60 used in the embodiment has steps 62 regularly spaced between two girder members 61 parallel to each other.
  • the spacing between the girder members 61 is set equal to the width of the narrow scaffolding board 30a, and the length of the girder members 61 is set so that the girders can be bridged between the landing floor sections 40 of narrow scaffolding boards 30a positioned parallel at two adjacent levels.
  • Hand rails 64 are detachably attached to the two girder members 61.
  • a substantially L-shaped fastening member 63 provided at one end of each of the girder members 61, which end is at the upper end of the stairway 60, is adapted to be fastened to the fastening hole 41 in the landing floor section 41.
  • a flat grounding member 65 is attached to the other end of each of the girder members 61 in such a manner that the grounding angle can be changed to some extent, which end is at the lower end of the stairway 60.
  • the fastening member 63 is secured to a girder member 61 but may be arranged so that the fastening member can be screwed in the girder member 61 for adjustment.
  • the grounding member 65 may be fixed so that the grounding angle cannot be changed.
  • the stairway 60 is bridged between the landing floor sections 40 of the narrow scaffolding boards 30a horizontally installed at two adjacent levels, with the upper end of the stairway 60 fastened by fastening members 63 to the fastening holes 41 in the landing floor sections 40 of the narrow scaffolding board 30a at a higher level, and the lower end of the stairway 60 placed at the opening ceiling cutoff side of the landing floor section 40 of the narrow scaffolding board 30a at a lower level.
  • the stairways 60 are staggered in the vertical direction between two narrow scaffolding boards 30a installed on each level in such a manner that the stairways are installed between the frontward narrow scaffolding boards 30a on each level to ascend to the right between each landing floor section 40, and between the rearward scaffolding boards 30a to ascend to the left.
  • the grounding member 65 at the lower end of the stairway 60 between the ground and the second level, whose upper end is fastened to the landing floor section 40 of a narrow scaffolding board 30a at the second level as described above, is placed directly or through a board or the like for stabilizing the stairway on the ground.
  • the scaffolding board 30 used in the second embodiment is formed into a substantial rectangular frame, with the width thereof set equal to the length a of the beam 20 and the length thereof set equal to the span b between the poles 10.
  • a landing floor section 40 is formed in one lengthwise end of the scaffolding board as in the first embodiment, and a hand rail 70 is detachably installed on three sides of the landing floor section 40.
  • fastening holes 41 are provided in the landing floor section 40, two at both ends of the edge thereof facing the open ceiling cutoff section 50 of the scaffolding board and two side by side at a substantial center of the edge, so that a fastening member 63 of a stairway 60 can be hooked in the fastening holes.
  • scaffolding boards 30 arranged as described above are bridged between beams 20 at individual levels so that the scaffolding boards 30 are parallel with each other, the beams connecting poles 10 installed as in the first embodiment.
  • Stairways 60 arranged as in the first embodiment are installed zigzag between the landing floor sections 40 of the scaffolding boards 30 in the same way as in the first embodiment.
  • first and third levels for example, using one stairway 60 passing through the open ceiling cutoff section 50 at the second level if the girders thereof are lengthened as required.
  • a third embodiment includes temporary stairway systems A arranged under various site conditions as in the first embodiment or second embodiment.
  • Fig. 4(a) is a front view of an independent temporary stairway system A assembled by installing poles 10 and connecting them using beams 20 at a construction site as in the first or second embodiment. Independently installing such a temporary stairway system A allows a temporary passage connecting the ground level and higher levels to be readily obtained.
  • Fig 4(b) is a front view of a temporary stairway system A assembled by installing poles 10 a specified distance apart from each other beside existing scaffoldings a and connecting poles 11 for the existing scaffoldings using beams 20 as appropriate as in the first or second embodiment.
  • Fig. 4(c) is a front view of stairways 60 temporarily installed existing scaffoldings a as in the first or second embodiment. Stairways 60 temporarily installed between scaffoldings in such manner are useful if the scaffoldings are provided over a long distance, since the stairways 60 in the middle part can be conveniently used for ascending and descending in each side.
  • Fig. 4(d) shows stairways 60 incorporated into a scaffolding system by using beams 20 for scaffoldings in desired sections formed by scaffoldings a.
  • stairways 60 can be temporarily installed in an existing scaffolding system if the dimensions of the scaffolding board 30 of the present invention are set equal to those of scaffoldings constituting the system.
  • a fourth embodiment describes a method for installing a temporary stairway system, comprising stairways at multiple levels, in a pit, the system serving as a passage connecting the ground and the bottom of the pit.
  • a prefabricated temporary stairway unit A1 composed of two layers (or one layer), is formed by connecting the upper and lower ends of two sets of four poles 10 using beams 20.
  • the poles 10 placed one on top of the other are adapted so that they can be connected together by inserting one set of poles into the other, but connecting beams may be used to connect the poles together.
  • Scaffolding boards 30 having the a landing floor section 40 and an open ceiling cutoff section 50, adjacent to each other, are bridged between beams facing each other at individual levels.
  • two narrow scaffolding boards 30a are disposed by placing the fastening members 31 at both ends thereof over beams 20 to form a scaffolding board 30.
  • the two narrow scaffolding boards 30a are bridged so that the landing floor sections 40 thereof are positioned side by side.
  • the narrow scaffolding boards 30a at two adjacent levels are bridged so that the landing floor sections 40 thereof are disposed alternately on the right and the left side from level to level.
  • Stairways 60 are installed between adjacent levels to assemble the prefabricated temporary stairway unit A1 on the ground.
  • a pit in which the prefabricated temporary stairway unit A1 is to be installed is excavated to a depth equivalent to the height of the system.
  • a hoist B such as a crane, is used to lower the prefabricated temporary stairway unit A1 completed to the bottom of the pit.
  • the embodiment is arranged so that the upper end of the prefabricated temporary stairway unit A1 is substantially flush with the ground when the system is at the bottom of the pit.
  • the upper end of the prefabricated temporary stairway unit A1 may be slightly above or below the ground.
  • Fittings C1 are used to secure the poles 10 in the lower layer of the prefabricated temporary stairway unit A1 to a connecting beam D, which is bridged between shore struts E as shown in Fig. 5(a).
  • the connecting beam D is provided in the pit, but the upper end of the prefabricated temporary stairway unit A1 may be fixed to connecting beams D or steel members, provided around the opening of the pit.
  • pipe clamps 72 are provided on sides of the fittings C so that the fittings, which are formed as clamps to be fixable to the connecting beam D, can joint the poles 10 end to end.
  • the fittings C are not limited to such an arrangement but may be arranged so that they can joint the poles 10 end to end and are fixable to the connecting beam D.
  • the pit is further excavated through a distance equivalent to the height of an extension temporary stairway unit A2.
  • poles 10 are inserted into the lower ends of the poles 10 of the prefabricated temporary stairway unit A1 and then secured, and the lower ends of the poles 10 inserted are connected together using beams 20 to form the frame of the extension temporary stairway unit A2.
  • Narrow scaffolding boards 30a are bridged between the beams 20 so that the landing floor sections 40 of those narrow scaffolding boards are opposite to the landing floor sections 40 of the narrow scaffolding boards at the bottom of the prefabricated temporary stairway unit A1.
  • a stairway 60 is installed between a narrow scaffolding board 30a at the bottom of the extension temporary stairway unit and a narrow scaffolding board 30a at the bottom of the prefabricated temporary stairway unit. As described above, in the pit, the extension temporary stairway unit A2 is added to the bottom of the prefabricated temporary stairway unit A1.
  • the pit is still further excavated through a distance equivalent to the height of an extension temporary stairway unit A3 to add the unit A3 to the bottom of the extension temporary stairway unit A2 in using the procedure described above as shown in Fig. 5(d).
  • the extension temporary stairway unit A3 is secured to a bridge beam in the pit.
  • a temporary stairway system connecting the ground with the bottom of the pit can be built in four layers.
  • the temporary stairway system composed of four layers is installed.
  • An operation composed of excavating a pit and then adding an extension temporary stairway unit can be repeated as many times as necessary to build a temporary stairway system consisting of a desired number of layers in a pit with a desired depth.
  • poles 10 and beams 20 are secures to connecting beams D to prevent the poles 10 and stairways 60 from jolting.
  • the stairway 60 and the landing floor section 40 are formed separately from each other; however, an arrangement can be used where, as shown in Fig. 7, landing floor sections 81 are integrated with the stairway 60 at both ends thereof, and fastening members 83 which are fastened to the beam 20 are provided at the external end of the landing floor section 81.
  • This arrangement allows narrow scaffolding boards 30a above and belou the stairway to be eliminated when a temporary stairway system is established.
  • the narrow scaffolding board 30a blow the stairway can be also omitted if a landing floor section 81 is integrated with only either one of uppon or lower end of the stairway, the lower end in this emboding, and fastening member 83 which are fasened to the beams 20 are provided at the external end of the landing floor section.
  • an arrangement is made where scaffolding boards having a landing floor section and an open ceiling cutoff section adjacent to each other are bridged between beams connecting poles jointed one on top of another, which poles are at the four vertexes of a rectangle, and stairways are installed between the landing floor sections of the scaffolding boards.
  • both a landing and a stairway can be provided in the span between poles.
  • a temporary stairway system of the present invention can readily be installed in a construction site where the width of the system cannot be increased.
  • a temporary stairway system of the present invention having landings, can be provided even at a site with a small space where it has thus far been impossible to provide a temporary stairway system with landings, and thus operational safety at the site can be enhanced. Furthermore, unlike conventional temporary stairway systems, a temporary stairway system according to the present invention does not require supports dedicated to landing floor sections, thus reducing construction costs for scaffolding installation.
  • hand rails are installed on the sides of a landing floor section and a stairway, preventing workers from falling from a scaffolding by accident.
  • the dimensional standards for members for a temporary stairway system of the present invention are set according to an existing scaffolding system, the members can be incorporated into the existing scaffolding system, or stairways can be installed in connection with existing scaffoldings.
  • a stairway system installation method of the present invention is to extend a temporary stairway system downward as a pit is made deeper, the temporary stairway system can be used to ensure traffic between the ground and the bottom of the pit even when excavation is under way.
  • the ground and the bottom of a pit is not connected until a temporary stairway system reaches the ground from the bottom after the pit is excavated to a specified depth, but a method of the present invention has obviated such an inconvenience.
  • a temporary stairway installation method of the present invention allows a stairway unit constituting a stratified temporary stairway system to be assembled or added to another stairway unit on the ground or at the bottom of a pit, and thus dangerous operations performed high above the ground can be avoided which are involved in stairway system assembly.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Movable Scaffolding (AREA)
EP95118316A 1994-11-25 1995-11-21 Vorläufige Treppe mit Podest und Anwendungsverfahren Withdrawn EP0713942A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP31592894 1994-11-25
JP315928/94 1994-11-25

Publications (1)

Publication Number Publication Date
EP0713942A1 true EP0713942A1 (de) 1996-05-29

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EP95118316A Withdrawn EP0713942A1 (de) 1994-11-25 1995-11-21 Vorläufige Treppe mit Podest und Anwendungsverfahren

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445399A3 (de) * 2003-02-08 2004-12-22 C.O. Weise GmbH & Co. KG Gerüsttreppenmodul
EP1761675A2 (de) * 2004-05-27 2007-03-14 HAYES, Richard, Sr. Modulare mehrebenenzugangsplattform und verfahren zu deren errichtung
US7971408B2 (en) 2004-05-27 2011-07-05 Hayes Sr Richard Stairtower and method for erecting the same
CN104674848A (zh) * 2015-02-16 2015-06-03 中交四航局第二工程有限公司 一种进出沉管的竖向临时通道及该通道的安装方法
CN106869421A (zh) * 2017-01-10 2017-06-20 中国建筑第八工程局有限公司 组装式楼梯结构及其安装方法
CN109138498A (zh) * 2018-10-25 2019-01-04 中铁建工集团有限公司 一种深基坑安全笼梯
CN109138499A (zh) * 2018-10-26 2019-01-04 中建五局华东建设有限公司 一种预制楼梯定型化施工防护架
US20220235562A1 (en) * 2021-01-26 2022-07-28 Commercial Scaffolding Companies, Inc. Scaffolding stair system
CN109138499B (zh) * 2018-10-26 2024-05-31 中建五局华东建设有限公司 一种预制楼梯定型化施工防护架

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760707A (en) * 1951-07-09 1956-08-28 Safway Steel Products Inc Scaffold stair unit
US3052332A (en) * 1955-02-21 1962-09-04 Potomac Iron Works Inc Stairways
US4707957A (en) * 1986-08-20 1987-11-24 Shepherd John D Preassembled platform stairway
EP0276488A2 (de) * 1987-01-27 1988-08-03 Langer geb. Layher, Ruth Aufstiegseinrichtung für Gerüste
DE8707755U1 (de) * 1987-05-30 1988-09-29 Langer, Geb. Layher, Ruth, 7129 Gueglingen, De
FR2644497A1 (fr) * 1989-03-16 1990-09-21 Pozo Jean Echafaudage de haute securite et de mise en oeuvre rapide

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760707A (en) * 1951-07-09 1956-08-28 Safway Steel Products Inc Scaffold stair unit
US3052332A (en) * 1955-02-21 1962-09-04 Potomac Iron Works Inc Stairways
US4707957A (en) * 1986-08-20 1987-11-24 Shepherd John D Preassembled platform stairway
EP0276488A2 (de) * 1987-01-27 1988-08-03 Langer geb. Layher, Ruth Aufstiegseinrichtung für Gerüste
DE8707755U1 (de) * 1987-05-30 1988-09-29 Langer, Geb. Layher, Ruth, 7129 Gueglingen, De
FR2644497A1 (fr) * 1989-03-16 1990-09-21 Pozo Jean Echafaudage de haute securite et de mise en oeuvre rapide

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1445399A3 (de) * 2003-02-08 2004-12-22 C.O. Weise GmbH & Co. KG Gerüsttreppenmodul
EP1761675A2 (de) * 2004-05-27 2007-03-14 HAYES, Richard, Sr. Modulare mehrebenenzugangsplattform und verfahren zu deren errichtung
EP1761675A4 (de) * 2004-05-27 2009-11-18 Richard Hayes Sr Modulare mehrebenenzugangsplattform und verfahren zu deren errichtung
US7971408B2 (en) 2004-05-27 2011-07-05 Hayes Sr Richard Stairtower and method for erecting the same
CN104674848A (zh) * 2015-02-16 2015-06-03 中交四航局第二工程有限公司 一种进出沉管的竖向临时通道及该通道的安装方法
CN106869421A (zh) * 2017-01-10 2017-06-20 中国建筑第八工程局有限公司 组装式楼梯结构及其安装方法
CN109138498A (zh) * 2018-10-25 2019-01-04 中铁建工集团有限公司 一种深基坑安全笼梯
CN109138499A (zh) * 2018-10-26 2019-01-04 中建五局华东建设有限公司 一种预制楼梯定型化施工防护架
CN109138499B (zh) * 2018-10-26 2024-05-31 中建五局华东建设有限公司 一种预制楼梯定型化施工防护架
US20220235562A1 (en) * 2021-01-26 2022-07-28 Commercial Scaffolding Companies, Inc. Scaffolding stair system

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