CA2110183A1 - Work platform system for multi-storey buildings - Google Patents
Work platform system for multi-storey buildingsInfo
- Publication number
- CA2110183A1 CA2110183A1 CA002110183A CA2110183A CA2110183A1 CA 2110183 A1 CA2110183 A1 CA 2110183A1 CA 002110183 A CA002110183 A CA 002110183A CA 2110183 A CA2110183 A CA 2110183A CA 2110183 A1 CA2110183 A1 CA 2110183A1
- Authority
- CA
- Canada
- Prior art keywords
- building
- work platform
- perimeter
- support
- platforms
- 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
Links
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
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
Abstract
A work platform system for the perimeter face of a multi-storey building (12), having a plurality of support frames (10) positioned and attached via support structures (11) on the roof (12a) of the building and extending in cantilever style beyond the perimeter of the building, with support members (18) suspending a series of work platforms from the support frames down the perimeter of the building. Jack means (16) either screw type jacks, or hydraulic or pneumatic jacks, being selectively coupled between the support frames and the platform or platforms to incrementally raise or lower the work platform or platforms relative to the perimeter face of the building.
Description
WO 9V2183$ PCI`/AU92/002t9 ~WOR~ PI~TFORN SYSTEM FOR MULTI-STOREY BUILDINGS "
Technical Field This invention relates to ~ work platform.sy~tem for multi-storey buildings, and in particular a system which enables temporary access to the perimeter ~facade) of a building, for men and materials for example, ~nd for the purpose of maintenance, refurbishment or cladding replacement. .
B~c~around Art Access to the perimeter face of a buildi~g is traditionally done with the use of scaffolding assamblad from the ground upward, which is time consuming and labour intensive. Scaffolding cantilevered from various levels within the building has al80 been u~ed, but this intrudes upon tenanted floor space.
Alternatively, swing ~tage scaffolding, on ropes from overhead davits located on the top of the building, may be used, but these normally have a very limited load capacity. The rope climbing motors u~ed are numerou~, small capacity machines and ~ynchronising of the climbing operation al~o presents a problem.
~ t is the ob~ect of the pre~ent invention to pro~ide platforms for working acce~s to the per~m~ter of a building which are of greater c~pacity than pre~ious suspend~d ystems and are not ~ubject to the proble~s ss~ociated therewi~h. With the present invention work platforms can be larger and more adequate for their task, and ~uspension members are less nu~erous requiring fewer points of control in the lifting process as well as being visually more pleasing on the face of the building during the use of the system. Control of platform level is more positive and precise, and being a suspended system W09~2l ~ rCT~U92/~22g upported at the top, out~ide t~ ~Q~d~ng, no ten~nted floor space need be occupied by the system, and the building perimeter at ground level may al80 remain a~ailable to, or not interfere with movement of, the public as i8 the ease with ground ~upported seaffoldlng.
It i8 also an ob~eet of the present $nvention that ~eeess to the perimeter of the building be flexible, both in plan geometry, and in order to aeeom~odate ehanges in the vertieal faee alignment of the building.
The present invention envisages a work platform system for the perimeter faee of a multi-storey building, ineluding mean~, in use, to support the syste~ at the top or an upper storey level of the building and extend~ng - beyond the perimeter thereof, means to ~uspend at lQast one work platform down the faee of the perimeter of the build~ng, and ~aek means seleetively eoupled between said support means and said suspension means whereby upon inereasing or deereasing the length of said suspen~ion mean~ the work platform or platform~ ean be inerementally lowered down, or raised up, the faee of the perimeter of the building.
Preferably the support means is a support frame fixed eantilever style to the top or upper storey le~el of the building, the suspension ~eans is a series of elongate suspension me~bers, and the ~aek means are serew ~aeks, or hydraulie or pneumatie rams.
Preferably the side of t~e platform or platfoxms away from the faee o the perimeter of the building has enelosure means applied thereto for workman safety.
Brief Descri~tion of the Drawin~s One preferred embodiment of the invention will now be de~eribed with reference to the aceompanying draw~ngs, in whieh;
Figure 1 is a plan view of the sy~tem extending around the faee of the perimeter of a build~ng, Figure 2 is a eross-seetional view taken along line 2-2 of Figure 1 during one ph~se of operation of the syste~, w09~2l8~ PCT/~U9~22s Figure 3 is a cross-sectional view simll~r to that of Figure 2 during a ~ubsequent pha~e of oper~tlon of the system, and Figure 4 i~ a cro~J-sectional view once ~g~in simil~r to th~t of Figures 2 ~nd 3 during a furth r subseguent phase of oper~tion of the ~y~tem.
Best Modes for Carrvin~ Out the Invent~on.
With reference to the drawings, the ~ystem of this preferred embodi~ent of the invention compriseJ ~ plur~llty of support fr~mes 10 po~itioned ~nd ~tt~ched ~$~ ~upport structures 11 on the roof 12~ of the bu$1ding at ~p~eed ~p~rt intervals around the top of the perimeter of building 12 ~nd extending c~nt$1ever style over the building p~r~pet 12b b~yond the per~mAter of the building.
The building is a multi-storey building havlng a plurality of floor levels 13, and the syste~ is to be used to ~llow ~inten~ncè, refurbishment or cl~dding repl~eement of the f~ce of the perimeter of the building. The support fr~m~s 10 eomprlse ~ p~ir vertic~lly ~p~eed ~p~rt r~ or ~ck support~platforms 14 and 15, on the lower one 14 of which the l~wer~end of re~pective r~ms or ~acks 16 ~re ~ttached to d vertically upwardly therefrom ~nd through the upper pl~tform lS. The r~os or ~cks i6 may be electric ~otor driven screw ~acks of the type described ~nd illu~trated in the spec~fic~tion of our International Patent Application No. PCT~AU90~00042, and c~rry ~t their upper ends he~d fr~mes ?7 which ~re successively r~ised ~nd lowered dur~ng extension ~nd retr~ction of the ~ack~.
A plurality of sets of elong~te suspension members ~re suspended from the he~d fr~mes 17, ~nd ~re in the for~ of suspension tubes 18 ~ligned ~nd attached end to end to extend down the face of the perimeter of the building ~nd to ~uccessively lower levels thereof. The lower ends of the aligned sets of suspension tubes carry a plurality of vertical~y sp~ced ~p~rt work platforms 2~ to support workmen maint~ining, refurbi~hing, or replacing cl~dding on, the face of the building. The platforms 21 w092~2l~ 2 1 1 0 1 8 3 pcT/~u92~oo229 extend through and between the sets of suspension tubes to thereby provide continuous platforms extending around the face of the perimeter of the build~ng.
Barriers 22 for the ~afety of work~en are provided on the sides of the work platforms away from the face of the perimeter of the building, and buf~ers, slides or rollers 23 are supported by the platform structure to bear against, and ~pace the platform structure from, the face of the perimeter of the building.
The ~acks 16, which are controlled to operate in unison by a central controller, together with the head fra~es 17, are crane lifted into the support frames 10 which are attached to the top of the building. The fr~mes 10 provide access to the ~ack area for operation, placement and removal of attach~ents and other component~. The frames 10 may be adapted in their support and attachment to thè individual building on wh~ch they are located.
In the form ~hown, the platforms are capable of ~panning large dlstances between tubes, and a number of working levels may be supported by the continuous structure, as depicted. Cont~nuity of the work~ng platform~ may bè about the entire building perimeter, or ted to discrete zones - independent on each build~ng face for instance. Further, this contlnuity in a ~ulti-level platforms may be staggered vertlcally at selected locations to accommodate a change ln worklng conditions or a better deployment of labour. The sy~tem is flexible and options in eont~nuity of the platforms are numerou~, dependent on support and re~traint eondltions reguir~d.
Aeees~ to the working platform area~ may be by man and material hoists up the out~ide of the building or via the tupport struetures 11 on the roof of the building.
Sueh hoists outside of the building may readily aceess/enter the work platform area, being inerementally ad~usted in height to mateh the ehange in level of the working platforms. Alternatively, access may be by crane externally, or internally by use of the building lifts and .
I
W092~2l~ PcT/~ug2/~229 2llals~
_ 5 _ ~ccessing the platforms through a window or from balcony.
In order to further stabilize ~nd balance the system props 24 and 24` may be respectively coupled between the inner sides of th~ support frames 10 ~nd the parapet 12b and between the frame 10 and the top of the parapet 12b, whilst frames 25 containing counter weights may be suspended from the inner sides of the support frames.
When the sy~tem is in operation the platforms 21 , may be either incrementally lifted from the ground up, or lowered in¢rementally from the top of the building downward. -, The op~ration of the ~ystem will be descrlbed for the more difficult of the two alternative starting locationc, that is, lowering from the top downward.
~ Sufficient aligned sQt~ of suspension tubes 18 are connected to the he~d fr~mes 17 to extend to the platform structure incorporating the platforms 21. ,~
The working platforms 21, associated platform lév~ls ~nd b~rriees 22 are assembled in selQcted segments at ground level and then r~ised as completed components with external cr~nage to the underside of the support fra~es 10. Here the suspens~on tubes 18 between ~he platform structure 21 and the support frame 10 are coupled together in c~mplete safety.
, The pl~tform ~tructures are then connected together at the corners of the building.
Extern~l cr~n~ge is thereaftQr no longer needed -for the incremental lifting or lowerlng of the system.
Sufficient cranage for the ~upply or removal of materials, if nec~ssary, to ~nd from the work pl~tforms need only be provided during the operation of the system. External cranage will'be needed again for dism~ntl~ng the system.
~ Dism,antling of the lower p~rt of the system will be at ground level, - or even at a constructed level of protection above the ground ~llow~ng public ~ccess ~t the b~se of the building. It then re~ins to dism~ntle the rest of the system with external cr~n~ge. Pirst the j .
-:~
. ~, , wo g2~21~ 2 1 1 0 1 8 3 Pcr/~us2/00229 suspension tubes which must`be incrementally dismantled, and then the ~acks 2!md their frames at the top of the building.
With referenee to Figures 2, 3, and 4 of the drawings, during the work platform lowerlng operatlon as shown (F~gure 2) shear pins 19 or other attaehments are used to eouple e~eh of the sets of suspension tubes 18 to struetural me~ers of their respeetive support frames 10 at the lower ~aek support platform 14, with shear pins 19 or other attaehments being used to eouple the sets of suspension tubes to the respeetive he~d frames 17 at platform lS.
The best D~ans 80 far devised for the transfer of load from the su8pen8ion tubes 18 to supporting frames 10 or head frames 17 is the use of a surrounding support braeket aeeommodating two shear pins, eaeh in double shear, ~:
for the autom~tie and safe transfer of load to and from the suspension tubes 18 at both ~aek support platforms 14 and lS.
When the shear pins 19 are removed at platform 15 the ~aeks 16 ean be extended to raise the head frames 17 and repo2;ition platform as shown in Figure 3 whereafter additional su8pen8ion tubes 18 are positionQd for attaehment at their lower ends to the exist$ng sets of tubes 18 and eoupled by the shear pins 19 at their upper ends to the head fr~mes 17 nt platform lS. The shear pins 19 between the set~ of suspension tubes at platform 14 ean then be dis~ngaged and the ~aeks 16 retraeted to lower the set~ of su~pension tubes, and the work platform strueture downwardly to a lower position a8 shown in Figure 4. The seguenee of operations is repeated to inerementally lower the work platform strueture down the face of the perimeter of the building as maintenance, refurbishment ~new eladding 20) or the like proceeds over a period of time.
The operation sequenee may be varied in a number of ways, but in eaeh ease it involves a means of load transfer from the ~aeks 16 to the support frames 10 while the jaeks are extended and an extra suspension tubes 18 are :~, I-' ~ .
wos2~2l~ PCT/AU92/0022s _ 7 21 1 0 ~8:3 added. Then a reversal of the load transfer back from the support frames to the ~acks for the incremental downward movement of the work platform structure. The increment~l movement in the above operation is egual to the interval between platforms 14 and lS and is matched to the incremiental movement required at working platform structure below.
A variation of the above operation is, for instance, as follows. Again consider the change ln system levei operation commencing with the shear pin~ lnstalled at platform 14 ~nd the platform structure suspended from the support frames lO on top of the building at this level, but st~ll connected via the suspension tubes 18 and head^fr~mes 17 to the ~acks 16.
- The sets of suspension tubes are uncoupled from the top suspension tubes at the coupling ~ust above platform I4.
The jacks 16 are now free to be extended to lift the head frames l? and top suspension tubes, away from the remaining lower sets of suspension tubes.
The head frames are reconnected to the lower sets of suspension tubes by adding and coupling additional suspension tubes between platforms 14 and 15, the coupling ; be~ng at ~ust above platform ~S, and below ~ust above platform 14.
The ~acks are then extended sufficiently to take the weight of the platform structure and sets of suspension tubes. The shear pins in the suspen~ion tubes at platform l~ are removed and the ~acks are then retractQd to the head level. The ~upport shear pins l9 are recoupled to the suspension tubes at platform 14. The ~acks are then slightly retracted to transfer the load ~o the support frame at platform 14.
The different options in varying this sequence have different advantages and disadvantages, but in each the underlying principle is the same.
The advantages in the operation of this system over the prior art may now be further elaborated upon in l ~
;:~
:
: ~
WO g2/21838 ' ' PCr/~Ug2/00229 the light of the above descriptio~ 1~ Yhe ~y~tem.
As control on the finite and discrete number of suspension lifting points may be guite precise, especially using the motor ~crew ~acks disclosed in the Internat~onal Patent ~pplication referred to above, and controlled to operate in un~60n, the entire perimeter work platform structure can be lifted simultaneou~ly. The platform ~tructure on each face of the building can then, as a ~;
con~eguence, be connected together at the bu~ld$ng corner~
throughout the entire operation, which offers mutual stability to the platform string in plan located on each of the building elevations.
It can be seen from the above description of the system that it 18 readily adapted to varlous building plan geometrie~. Similarly, limited changes in vertical alignment of a building face or faces, may be accommodated by a shift of the location of the ~ack on its supporting frame at the top of the building. This shift can be achieved, as may be required part way through a building maintenance pro~ect, with the aid of external cranage and for example the ad~ustment of the platform strlng at corner ~oints. -~; ~Furthermore the weight of the platform structure is taken directly by the support frames attached to the building except during the ~acking between levels. The system is, in effect, static for the ma prity of time, and ;no dynamic load~ need be considered on the sy~tQm. It is only during the ~acking shift that dynamic loading and ~ack capacity reduction involving this dyn~mic load need be considered - thi~ is a time when the live loads on the system may be reduced by appropriate ~ite control and management.
"~
~' ':
Technical Field This invention relates to ~ work platform.sy~tem for multi-storey buildings, and in particular a system which enables temporary access to the perimeter ~facade) of a building, for men and materials for example, ~nd for the purpose of maintenance, refurbishment or cladding replacement. .
B~c~around Art Access to the perimeter face of a buildi~g is traditionally done with the use of scaffolding assamblad from the ground upward, which is time consuming and labour intensive. Scaffolding cantilevered from various levels within the building has al80 been u~ed, but this intrudes upon tenanted floor space.
Alternatively, swing ~tage scaffolding, on ropes from overhead davits located on the top of the building, may be used, but these normally have a very limited load capacity. The rope climbing motors u~ed are numerou~, small capacity machines and ~ynchronising of the climbing operation al~o presents a problem.
~ t is the ob~ect of the pre~ent invention to pro~ide platforms for working acce~s to the per~m~ter of a building which are of greater c~pacity than pre~ious suspend~d ystems and are not ~ubject to the proble~s ss~ociated therewi~h. With the present invention work platforms can be larger and more adequate for their task, and ~uspension members are less nu~erous requiring fewer points of control in the lifting process as well as being visually more pleasing on the face of the building during the use of the system. Control of platform level is more positive and precise, and being a suspended system W09~2l ~ rCT~U92/~22g upported at the top, out~ide t~ ~Q~d~ng, no ten~nted floor space need be occupied by the system, and the building perimeter at ground level may al80 remain a~ailable to, or not interfere with movement of, the public as i8 the ease with ground ~upported seaffoldlng.
It i8 also an ob~eet of the present $nvention that ~eeess to the perimeter of the building be flexible, both in plan geometry, and in order to aeeom~odate ehanges in the vertieal faee alignment of the building.
The present invention envisages a work platform system for the perimeter faee of a multi-storey building, ineluding mean~, in use, to support the syste~ at the top or an upper storey level of the building and extend~ng - beyond the perimeter thereof, means to ~uspend at lQast one work platform down the faee of the perimeter of the build~ng, and ~aek means seleetively eoupled between said support means and said suspension means whereby upon inereasing or deereasing the length of said suspen~ion mean~ the work platform or platform~ ean be inerementally lowered down, or raised up, the faee of the perimeter of the building.
Preferably the support means is a support frame fixed eantilever style to the top or upper storey le~el of the building, the suspension ~eans is a series of elongate suspension me~bers, and the ~aek means are serew ~aeks, or hydraulie or pneumatie rams.
Preferably the side of t~e platform or platfoxms away from the faee o the perimeter of the building has enelosure means applied thereto for workman safety.
Brief Descri~tion of the Drawin~s One preferred embodiment of the invention will now be de~eribed with reference to the aceompanying draw~ngs, in whieh;
Figure 1 is a plan view of the sy~tem extending around the faee of the perimeter of a build~ng, Figure 2 is a eross-seetional view taken along line 2-2 of Figure 1 during one ph~se of operation of the syste~, w09~2l8~ PCT/~U9~22s Figure 3 is a cross-sectional view simll~r to that of Figure 2 during a ~ubsequent pha~e of oper~tlon of the system, and Figure 4 i~ a cro~J-sectional view once ~g~in simil~r to th~t of Figures 2 ~nd 3 during a furth r subseguent phase of oper~tion of the ~y~tem.
Best Modes for Carrvin~ Out the Invent~on.
With reference to the drawings, the ~ystem of this preferred embodi~ent of the invention compriseJ ~ plur~llty of support fr~mes 10 po~itioned ~nd ~tt~ched ~$~ ~upport structures 11 on the roof 12~ of the bu$1ding at ~p~eed ~p~rt intervals around the top of the perimeter of building 12 ~nd extending c~nt$1ever style over the building p~r~pet 12b b~yond the per~mAter of the building.
The building is a multi-storey building havlng a plurality of floor levels 13, and the syste~ is to be used to ~llow ~inten~ncè, refurbishment or cl~dding repl~eement of the f~ce of the perimeter of the building. The support fr~m~s 10 eomprlse ~ p~ir vertic~lly ~p~eed ~p~rt r~ or ~ck support~platforms 14 and 15, on the lower one 14 of which the l~wer~end of re~pective r~ms or ~acks 16 ~re ~ttached to d vertically upwardly therefrom ~nd through the upper pl~tform lS. The r~os or ~cks i6 may be electric ~otor driven screw ~acks of the type described ~nd illu~trated in the spec~fic~tion of our International Patent Application No. PCT~AU90~00042, and c~rry ~t their upper ends he~d fr~mes ?7 which ~re successively r~ised ~nd lowered dur~ng extension ~nd retr~ction of the ~ack~.
A plurality of sets of elong~te suspension members ~re suspended from the he~d fr~mes 17, ~nd ~re in the for~ of suspension tubes 18 ~ligned ~nd attached end to end to extend down the face of the perimeter of the building ~nd to ~uccessively lower levels thereof. The lower ends of the aligned sets of suspension tubes carry a plurality of vertical~y sp~ced ~p~rt work platforms 2~ to support workmen maint~ining, refurbi~hing, or replacing cl~dding on, the face of the building. The platforms 21 w092~2l~ 2 1 1 0 1 8 3 pcT/~u92~oo229 extend through and between the sets of suspension tubes to thereby provide continuous platforms extending around the face of the perimeter of the build~ng.
Barriers 22 for the ~afety of work~en are provided on the sides of the work platforms away from the face of the perimeter of the building, and buf~ers, slides or rollers 23 are supported by the platform structure to bear against, and ~pace the platform structure from, the face of the perimeter of the building.
The ~acks 16, which are controlled to operate in unison by a central controller, together with the head fra~es 17, are crane lifted into the support frames 10 which are attached to the top of the building. The fr~mes 10 provide access to the ~ack area for operation, placement and removal of attach~ents and other component~. The frames 10 may be adapted in their support and attachment to thè individual building on wh~ch they are located.
In the form ~hown, the platforms are capable of ~panning large dlstances between tubes, and a number of working levels may be supported by the continuous structure, as depicted. Cont~nuity of the work~ng platform~ may bè about the entire building perimeter, or ted to discrete zones - independent on each build~ng face for instance. Further, this contlnuity in a ~ulti-level platforms may be staggered vertlcally at selected locations to accommodate a change ln worklng conditions or a better deployment of labour. The sy~tem is flexible and options in eont~nuity of the platforms are numerou~, dependent on support and re~traint eondltions reguir~d.
Aeees~ to the working platform area~ may be by man and material hoists up the out~ide of the building or via the tupport struetures 11 on the roof of the building.
Sueh hoists outside of the building may readily aceess/enter the work platform area, being inerementally ad~usted in height to mateh the ehange in level of the working platforms. Alternatively, access may be by crane externally, or internally by use of the building lifts and .
I
W092~2l~ PcT/~ug2/~229 2llals~
_ 5 _ ~ccessing the platforms through a window or from balcony.
In order to further stabilize ~nd balance the system props 24 and 24` may be respectively coupled between the inner sides of th~ support frames 10 ~nd the parapet 12b and between the frame 10 and the top of the parapet 12b, whilst frames 25 containing counter weights may be suspended from the inner sides of the support frames.
When the sy~tem is in operation the platforms 21 , may be either incrementally lifted from the ground up, or lowered in¢rementally from the top of the building downward. -, The op~ration of the ~ystem will be descrlbed for the more difficult of the two alternative starting locationc, that is, lowering from the top downward.
~ Sufficient aligned sQt~ of suspension tubes 18 are connected to the he~d fr~mes 17 to extend to the platform structure incorporating the platforms 21. ,~
The working platforms 21, associated platform lév~ls ~nd b~rriees 22 are assembled in selQcted segments at ground level and then r~ised as completed components with external cr~nage to the underside of the support fra~es 10. Here the suspens~on tubes 18 between ~he platform structure 21 and the support frame 10 are coupled together in c~mplete safety.
, The pl~tform ~tructures are then connected together at the corners of the building.
Extern~l cr~n~ge is thereaftQr no longer needed -for the incremental lifting or lowerlng of the system.
Sufficient cranage for the ~upply or removal of materials, if nec~ssary, to ~nd from the work pl~tforms need only be provided during the operation of the system. External cranage will'be needed again for dism~ntl~ng the system.
~ Dism,antling of the lower p~rt of the system will be at ground level, - or even at a constructed level of protection above the ground ~llow~ng public ~ccess ~t the b~se of the building. It then re~ins to dism~ntle the rest of the system with external cr~n~ge. Pirst the j .
-:~
. ~, , wo g2~21~ 2 1 1 0 1 8 3 Pcr/~us2/00229 suspension tubes which must`be incrementally dismantled, and then the ~acks 2!md their frames at the top of the building.
With referenee to Figures 2, 3, and 4 of the drawings, during the work platform lowerlng operatlon as shown (F~gure 2) shear pins 19 or other attaehments are used to eouple e~eh of the sets of suspension tubes 18 to struetural me~ers of their respeetive support frames 10 at the lower ~aek support platform 14, with shear pins 19 or other attaehments being used to eouple the sets of suspension tubes to the respeetive he~d frames 17 at platform lS.
The best D~ans 80 far devised for the transfer of load from the su8pen8ion tubes 18 to supporting frames 10 or head frames 17 is the use of a surrounding support braeket aeeommodating two shear pins, eaeh in double shear, ~:
for the autom~tie and safe transfer of load to and from the suspension tubes 18 at both ~aek support platforms 14 and lS.
When the shear pins 19 are removed at platform 15 the ~aeks 16 ean be extended to raise the head frames 17 and repo2;ition platform as shown in Figure 3 whereafter additional su8pen8ion tubes 18 are positionQd for attaehment at their lower ends to the exist$ng sets of tubes 18 and eoupled by the shear pins 19 at their upper ends to the head fr~mes 17 nt platform lS. The shear pins 19 between the set~ of suspension tubes at platform 14 ean then be dis~ngaged and the ~aeks 16 retraeted to lower the set~ of su~pension tubes, and the work platform strueture downwardly to a lower position a8 shown in Figure 4. The seguenee of operations is repeated to inerementally lower the work platform strueture down the face of the perimeter of the building as maintenance, refurbishment ~new eladding 20) or the like proceeds over a period of time.
The operation sequenee may be varied in a number of ways, but in eaeh ease it involves a means of load transfer from the ~aeks 16 to the support frames 10 while the jaeks are extended and an extra suspension tubes 18 are :~, I-' ~ .
wos2~2l~ PCT/AU92/0022s _ 7 21 1 0 ~8:3 added. Then a reversal of the load transfer back from the support frames to the ~acks for the incremental downward movement of the work platform structure. The increment~l movement in the above operation is egual to the interval between platforms 14 and lS and is matched to the incremiental movement required at working platform structure below.
A variation of the above operation is, for instance, as follows. Again consider the change ln system levei operation commencing with the shear pin~ lnstalled at platform 14 ~nd the platform structure suspended from the support frames lO on top of the building at this level, but st~ll connected via the suspension tubes 18 and head^fr~mes 17 to the ~acks 16.
- The sets of suspension tubes are uncoupled from the top suspension tubes at the coupling ~ust above platform I4.
The jacks 16 are now free to be extended to lift the head frames l? and top suspension tubes, away from the remaining lower sets of suspension tubes.
The head frames are reconnected to the lower sets of suspension tubes by adding and coupling additional suspension tubes between platforms 14 and 15, the coupling ; be~ng at ~ust above platform ~S, and below ~ust above platform 14.
The ~acks are then extended sufficiently to take the weight of the platform structure and sets of suspension tubes. The shear pins in the suspen~ion tubes at platform l~ are removed and the ~acks are then retractQd to the head level. The ~upport shear pins l9 are recoupled to the suspension tubes at platform 14. The ~acks are then slightly retracted to transfer the load ~o the support frame at platform 14.
The different options in varying this sequence have different advantages and disadvantages, but in each the underlying principle is the same.
The advantages in the operation of this system over the prior art may now be further elaborated upon in l ~
;:~
:
: ~
WO g2/21838 ' ' PCr/~Ug2/00229 the light of the above descriptio~ 1~ Yhe ~y~tem.
As control on the finite and discrete number of suspension lifting points may be guite precise, especially using the motor ~crew ~acks disclosed in the Internat~onal Patent ~pplication referred to above, and controlled to operate in un~60n, the entire perimeter work platform structure can be lifted simultaneou~ly. The platform ~tructure on each face of the building can then, as a ~;
con~eguence, be connected together at the bu~ld$ng corner~
throughout the entire operation, which offers mutual stability to the platform string in plan located on each of the building elevations.
It can be seen from the above description of the system that it 18 readily adapted to varlous building plan geometrie~. Similarly, limited changes in vertical alignment of a building face or faces, may be accommodated by a shift of the location of the ~ack on its supporting frame at the top of the building. This shift can be achieved, as may be required part way through a building maintenance pro~ect, with the aid of external cranage and for example the ad~ustment of the platform strlng at corner ~oints. -~; ~Furthermore the weight of the platform structure is taken directly by the support frames attached to the building except during the ~acking between levels. The system is, in effect, static for the ma prity of time, and ;no dynamic load~ need be considered on the sy~tQm. It is only during the ~acking shift that dynamic loading and ~ack capacity reduction involving this dyn~mic load need be considered - thi~ is a time when the live loads on the system may be reduced by appropriate ~ite control and management.
"~
~' ':
Claims (7)
1. A work platform system for the perimeter face of a multi-storey building including means, in use, to support the system at the top or an upper storey level of the building and extending beyond the perimeter thereof, means to suspend at least one work platform down the face of the perimeter of the building, and jack means selectively coupled between support means and said suspension means whereby upon increasing or decreasing the length of said suspension means the work platform or platforms can be incrementally lowered down, or raised up, the face of the perimeter of the building.
2. A work platform system as claimed in claim 1, wherein the support means is a support free fixed cantilever style to the top or upper storey level of the building.
3. A work platform system as claimed in claim 1 or 2, wherein the suspension means is a series of elongate support members adapted to be connected in end to end relationship between the support means and the work platform or platforms.
4. A work platform system as claimed in any one of the preceding claims, wherein the jack means are screw jacks.
5. A work platform system as claimed in any one of claims 1 to 3, wherein the jack means are hydraulic or pneumatic rams.
6. A work platform system as claimed in any one of the preceding claims, wherein said platform or platforms are enclosed.
7. A work platform systems substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPK6360 | 1991-05-28 | ||
| AUPK636091 | 1991-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2110183A1 true CA2110183A1 (en) | 1992-12-10 |
Family
ID=3775437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002110183A Abandoned CA2110183A1 (en) | 1991-05-28 | 1992-05-21 | Work platform system for multi-storey buildings |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPH06507686A (en) |
| CN (1) | CN1072233A (en) |
| CA (1) | CA2110183A1 (en) |
| DE (1) | DE4291607T1 (en) |
| GB (1) | GB2272421B (en) |
| NL (1) | NL9220018A (en) |
| NZ (1) | NZ242874A (en) |
| WO (1) | WO1992021838A1 (en) |
| ZA (1) | ZA923875B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9511746D0 (en) * | 1995-06-09 | 1995-08-02 | Aviall Caledonian Engine Servi | Gantry |
| CN101191381B (en) * | 2006-11-30 | 2010-09-08 | 上海市第一建筑有限公司 | Constructing method of tool-type hanging integral falsework system |
| KR101029982B1 (en) | 2008-10-22 | 2011-04-20 | 주식회사 리프텍 | elevator apparatus for construction |
| CN101775896B (en) * | 2010-02-11 | 2011-06-29 | 浙江大学 | Rigid suspended scaffold for installing pipeline of steel roof equipment |
| CN104110123B (en) * | 2014-07-04 | 2017-12-15 | 湖北汉安建筑安装工程有限公司 | A kind of elevating scaffold electric hoisting mechanism |
| CN106276550A (en) * | 2015-06-01 | 2017-01-04 | 江苏京龙工程机械有限公司 | Two-layer single-column lifting working platform |
| CN108658014B (en) * | 2018-02-13 | 2024-03-08 | 山西太重北特机械设备制造有限公司 | Movable multilayer platform for rocket fairing |
| CN112175638A (en) * | 2020-09-01 | 2021-01-05 | 中冶天工集团有限公司 | Coke oven double-layer resistance wall construction structure and construction method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR598256A (en) * | 1925-05-15 | 1925-12-12 | American Safety Device Company | scaffolding |
| US3066757A (en) * | 1961-05-09 | 1962-12-04 | Gerald W Robinson | Traveling scaffold |
| AU1826170A (en) * | 1970-07-30 | 1972-02-03 | William Cox Eric | Stabilised platform for window cleaning and like uses |
| DE2125422C3 (en) * | 1971-05-21 | 1979-09-13 | Dyckerhoff & Widmann Ag, 8000 Muenchen | Climbing formwork for erecting tower-like reinforced concrete structures |
| GB2106074B (en) * | 1981-08-13 | 1985-05-30 | Gray Mackenzie Technical Servi | Workplatform |
| NZ202555A (en) * | 1981-11-24 | 1985-07-12 | N G Cooper | Lift for personnel or goods raised and lowered by cable & pulley mounted on hydraulic cylinder & piston arrangement |
| GB8524450D0 (en) * | 1985-10-03 | 1985-11-06 | Colebrand Ltd | Transportation of cradle suspension device |
| GB2224262A (en) * | 1988-06-28 | 1990-05-02 | Kastle Dev Limited | Gondola assembly eg for offshore platform |
| CA2045509A1 (en) * | 1989-02-08 | 1990-08-09 | Hans Heinrich Schmidt | Building construction system |
-
1992
- 1992-05-21 WO PCT/AU1992/000229 patent/WO1992021838A1/en active Application Filing
- 1992-05-21 DE DE4291607T patent/DE4291607T1/en not_active Withdrawn
- 1992-05-21 NL NL9220018A patent/NL9220018A/en not_active Application Discontinuation
- 1992-05-21 CA CA002110183A patent/CA2110183A1/en not_active Abandoned
- 1992-05-21 JP JP4509406A patent/JPH06507686A/en active Pending
- 1992-05-22 NZ NZ24287492A patent/NZ242874A/en unknown
- 1992-05-27 ZA ZA923875A patent/ZA923875B/en unknown
- 1992-05-28 CN CN92104900A patent/CN1072233A/en active Pending
-
1993
- 1993-12-18 GB GB9325938A patent/GB2272421B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06507686A (en) | 1994-09-01 |
| DE4291607T1 (en) | 1994-05-05 |
| GB2272421A (en) | 1994-05-18 |
| NZ242874A (en) | 1994-07-26 |
| WO1992021838A1 (en) | 1992-12-10 |
| NL9220018A (en) | 1994-04-05 |
| CN1072233A (en) | 1993-05-19 |
| ZA923875B (en) | 1993-02-24 |
| GB2272421B (en) | 1994-11-23 |
| GB9325938D0 (en) | 1994-03-09 |
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