Abstract: A bracket for attachment to an upright scaffolding member has a rigid body with a front hook and rear hook thereon for engaging opposing front and rear faces of the upright scaffolding member. A support arm projects horizontally forward from the rigid body beyond the front hook for supporting an auxiliary platform thereon. A retainer member is movable on the body between an unlocked position in which an area between the hooks for receiving the upright scaffolding member therein is unobstructed and a locked position for engaging the upright scaffolding member in which the retainer member is immovable in the direction of engagement of the retainer member with the upright scaffolding member to prevent accidental release thereof.

Abstract: A system and method for allowing escape of many persons from a multistory building over a short period of time. The method and system include strategic placement and use of anchor points and components in conjunction with escape kits or devices so as to allow increased efficiency and safety of escape from the building for a plurality of persons in a coordinated manner, including escape of multiple escapees simultaneously or near simultaneously. The system and method include determining a strategic escape plan and configuration that incorporates consideration of building features, including features possibly interfering with escape routes, and three dimensional aspects of both building characteristics and anchor and escape kit and device features.

Abstract: For fire fighting and emergency rescue in high-rise buildings the building can be equipped with rails on the outside of the building. The rails have elevators, which travel on the rails on the outside face of the building. Two elevators traveling in unison and supporting a platform extending therebetween can provide a corridor and or a scaffold for reaching anyplace on the face of a building. Other elevators or elevators with cranes can be used on the rails in combination with the elevators with the platform to fight fires, rescue people from the upper floors of buildings or perform maintenance or construction tasks.

Abstract: An elevator system for traveling on a rail attached to the outside of a high-rise building. One elevator has a telescopic arm attached for reaching any position on or above the building. The telescopic arm consists of two parts, which are interconnected with a pivoting mechanism. The telescopic arm has a pivot at its end attached to a cramp, by a vertical rotating mechanism. The cramp is pivoted to an outside platform with a barrier, a cabin is hung from the platform and can make a full rotation. The elevator portion has a passenger compartment with sliding doors and a vertical aperture with a staircase connecting with an autonomous rescue elevator.

Abstract: A safety and accessibility assembly (10) having a pair of substantially identical hook portions (20, 26) which are coupled to a support frame having several pillar portions (12, 14, 16, 18), wherein the pillar portions (12, 14, 16, 18) are coupled to a platform portion (30). Particularly, the hook portions (20, 26) are adapted to removably and frictionally couple to a sea wall (100), thereby suspending the pillar portions (12, 14, 16, 18) and the platform (30) above a body of water (200), effective to allow accessibility into and out of the body of water (200) despite the level of the water (202).

Abstract: A guardrail system for a pitched roof of a building including a plurality of pitched roof members includes a plurality of end post supports that may be installed from ground level. Each of the end post supports may include a U-shaped body having a first segment for removably fastening to an end of a respective roof member, and having a second segment extending outwardly from the respective roof member with a gap therebetween defined by the U-shape. The end post supports may also include a post receiver connected to an upper end of the second segment of the U-shaped body, and a stabilizer carried by the U-shaped body for extending against an adjacent wall portion below the pitched roof. The guardrail system may further include a respective post carried by the post receiver of each end post support, and rail members to be connected between adjacent end posts.

Abstract: A work stage includes a work platform having first and second sides and a cross-beam, a first support part supporting the work platform and a counter-support disposed at the first side. In addition, the work stage includes a first holder including a bolt and attaching the work platform to the first support part and enabling the work platform to rest against the counter-support. A first vertical strut is disposed essentially at a right angle to the cross-beam, a second holder is disposed on the second side and configured to hold the work platform, a tie rod is connected at one end to the second holder and at the other end to the vertical strut, and a second vertical strut is disposed parallel to and at a distance from the first vertical strut and configured to receive at least one transverse strut. The first vertical strut and the crossbeam are bearing mounted at the first holder so as to pivot simultaneously around the bolt.

Abstract: An elevator for traveling on a rail attached to the outside of a high-rise building supports a telescoping arm for reaching any position on or above the building. A platform attached to the telescoping arm can deliver materials to the building while under construction and thereafter be used for building maintenance such as window washing. The movable platform adjacent a building can take the place of scaffolding for a safer work environment. The telescoping arm may have various attachments for different functions including a cabin for rescuing people trapped in a high-rise during a fire or for positioning fire fighters and hoses or fire fighting equipment next to a fire.

Abstract: A multi-purpose combined ladder/cart assembly capable of being converted into a plurality of ladder and cart configurations, including an extension ladder, a step ladder, a load-carrying cart, a pull cart, and a hand truck. The multi-purpose combined ladder/cart assembly includes a plurality of frame members that are pivotal with respect to each other and capable of being retained in variety of desired positions in order to easily configure the assembly in any of its various configurations. The travel characteristics and center of gravity of the cart configurations of the assembly are variably selectable, depending upon the load to be carried, by simply selecting various combinations of differently sized wheels to attach to the assembly.

Abstract: A construction platform comprising a stationary support structure adapted to be fixedly secured to the floor of a building under construction and project from the edge of the building to a predetermined maximum extent, and a movable deck mounted on the stationary structure which may be extended as a cantilever therefrom or retracted into at least substantial registration therewith.

Abstract: An angled brace scaffolding system comprises a plurality of scaffolding brackets, a plurality of adjustable outriggers and a plurality of walkways. The plurality of adjustable outriggers support the scaffolding brackets against a wall with the plurality of walkways spanning between the scaffolding brackets. The scaffolding brackets are a single piece comprising a downwardly extending wall support leg rigidly affixed to one end of an horizontally disposed walkway support and an upwardly extending guard rail post rigidly affixed to the opposite end of the horizontally disposed walkway support. The wall support leg and the walkway support having a gusset formed therebetween for attaching one end of one of the plurality of adjustable outriggers thereupon.

Abstract: An elevator system for traveling on a rail attached to the outside of a high-rise building. The rail has an H shape and has trolleys connected to cables riding in a channel on the rail for raising and lowering elevators. Motors rotate spoils having cables connected to the trolleys. One elevator having a telescoping arm attached for reaching any position on or above the building. A platform or cabin attached to the telescoping arm can deliver materials to the building while under construction and thereafter be used for building maintenance such as window washing. The movable platform adjacent a building can take the place of scaffolding for a safer work environment. The telescoping arm may have various attachments for different functions such as for rescuing people trapped in a high-rise during a fire or for positioning fire fighters and hoses or fire fighting equipment next to a fire.

Abstract: A buoyant marine safety ladder apparatus includes a ladder that is pivotably mounted to a seawall or other support platform and is alternatable between a retracted condition, wherein the ladder is floating above the water, and a deployed or extended condition, wherein the lower end of the ladder extends into the water. A stop component restricts pivoting of the ladder such that it extends upwardly from the body of water at an angle of approximately 45° when in the extended condition.

Abstract: The present invention is an improved, portable structural system which employs braces that are adapted to engage supporting lengths of construction material such as standard 2×4 studs or standard pipes. The braces have two spaced upper and lower inboard fittings which mount to supporting lengths of construction material. When the upper and lower inboard fittings are clamped to supporting lengths of construction material, horizontal supports of the braces can support a plank or a panel which can be used by a worker as a scaffold, shelf or workbench. The braces may also have outboard fittings for attaching to vertical lengths of construction material for supporting the outboard ends of the braces.

Abstract: A compact, portable, self-aligning anchor for anchoring an emergency escape system to a building. The anchor is comprised of a thin wall hemi-spherical housing, a tubular rope guide extending through the housing, a short rope extending through the tubular rope guide and a carabiner clip on a distal end of the rope for attaching the anchor to the emergency escape system. The anchor is placed or tossed on to the floor of a room and the rope is passed under a bottom surface of an inward opening door. The door is closed, the distal end of the rope is pulled to self align the anchor at about a 45 degree angle with respect to the door and the rope is attached to the emergency escape system to anchor the escape system to the building.

Abstract: A retractable scaffold support bracket is provided for mounting on the exterior surface of a concrete wall form. The bracket can be pivoted from an open enabling position to a closed locked position for transport or storage of the form walls. The bracket is of substantially triangular shape comprising a support plate, a vertical rod member, and a reinforcing truss. The vertical rod member is pivotally attached to a mounting base which secures the support bracket to the concrete form wall. The position of the support bracket is maintained in either the open or closed position by a locking element attached to the mounting plate and can be moved switched between the two positions by simply lifting and pivoting the bracket to the desired position.

Abstract: A suspended scaffolding system and method of use employs a plurality of scaffolding brackets that are hung from the framework of a building under construction to support a plurality of scaffolding planks to form a walkway therebetween. The scaffolding brackets include an anchor assembly, which is specially designed to wrap around the building's framework such that construction workers can complete their work without removing the brackets.

Abstract: A bracket to hold a boarding ladder to a boat. A quick release mechanism for both the ladder and the bracket itself are disclosed. A mounting plate is substantially flush with the side of the boat. The bracket slides down into the mounting plate and latches into place. The bracket accepts the upper bar of a boarding ladder and closes a latch over the bar, holding the ladder in place. To remove the ladder, a latch at the top of the bracket is lifted and the ladder can be easily pulled free. To free the bracket from the mounting plate after the ladder has been removed, the latch is lifted and the bracket can be lifted out.

Abstract: Masonry project kits assist with building basements. In the course of building a basement, it is frequently necessary to climb over and lift equipment over walls. A wall hanger is provided to attach a ladder to the side of a wall. The ladder's height can be adjusted by changing which rungs are hung on the wall hanger. A platform at the base of the ladder allows the floor of a basement to be finished without leaving footprints. A hoist is also included for lifting loads into and out of a basement or over a wall. The hoist securely mounts to the corner of a wall. Both the wall hanger and the hoist accommodate a variety of wall widths.

Abstract: A system for use in conjunction with emergency rescue sleeves that are mechanically deployed along at least a pair of supporting cables taught between a compacted sleeve storage compartment located at a designated story of a building and an anchor located at a point elsewhere below. The system provides for the slideable extraction of the compacted sleeve storage compartment (150), from the outer wall (110a) of a building (110) at the designated escape story, and the parallel and diagonal deployment of the rescue sleeve (112) alongside same exterior wall (110a) of the building (110).

Abstract: A device for rescuing persons and objects from buildings has at least one rescue element that is a rescue rope to be anchored to the ground. A retaining element of a rescue belt can be attached to the rescue rope. The rescue rope is wound onto a winding device in an initial state and unwound for a rescue operation. A deflection unit is attached to the rescue rope and has an axle. At least one driving gear is fixedly attached to the axle of the deflection unit for common rotation, and the rescue rope is redirected by 180° by the deflection unit.

Abstract: Rapid deployment of a suspension cable is a supportive system to several high-rise building rescue methods. A cable is pre-attached in a peelable manner to the building side and rigidly attached to the building top. An emergency chase vehicle is dispatched to the building base, attaches to the lower end of the cable and then moves away from the building. The cable peels off the building and suspends from the building top to the ground at approximately a 45 degree angle. A high-rise building rescue method now utilizes this deployed suspension cable.

Abstract: A scaffold support system having an adjustable-width hanger. A vertical leg may support a foot upon which rests a deck, providing a working surface during building construction or modification. A lateral beam rests on a support structure forming part of the wall of a building with the vertical leg securing to the lateral beam at a plurality of points. A stop secured to the lateral beam to capture a support structure between itself and the vertical leg. The stop may be adjustable along the lateral beam to accommodate support structures of varying widths. An operator may insert the hanger from inside a building and pass the coupler through a gap between a frieze block and a top plate, presenting the coupler for securement to the vertical leg. A catch may slide along the foot into and out of engagement with an edge of the deck to prevent rotation of the deck.

Abstract: An adjustable universal safety scaffold and walkboard ladder holder that absolutely prevents scaffold collapse or dis-attachment from a construction project and absolutely prevents a ladder placed against a walkboard from slipping sideways. Vertical supports can attach attach top and bottom to the building or work under construction. Hold brackets that can be raised or lowered slide up and down the vertical supports. A walkway sits on the hold brackets and is positively held in place by pins. A ladder can be optionally leaned against the walkboard and secured by additional stay bolts into the walkboard to prevent horizontal slipping.

Abstract: The fall arrester according to the present invention includes a plurality of upright standards which are spaced apart along the sill plate of a wall of a building under construction. The upright standards extend above the sill plate and netting is attached to the upright members to span the space between adjacent upright standards. A ledge bracket is provided on each of the upright standards which extends inwardly from the wall to which the upright standard is secured. Planks are then placed on the ledge brackets of adjacent upright standards to provide a working platform for workers installing roof trusses and sheathing. At the gable end of the building, a gable-end pole is mounted to a truss and lifelines are installed between the pole and the upright standards to prevent workers from falling from the gable-ends of the roof.

Abstract: A rapid escape system for buildings including at least one ride unit for a corresponding at least one building occupant to exit via an elevator-type shaft or tube or down the outside of a building at a rapid, predetermined and substantially constant descent velocity. The system includes a lightweight tuned open frame AC linear electromagnetic power generator with one active half fixed to a backpack/ride on which a person or other object/load can be securely fastened, the other active half fixed top to bottom to a tall structure. When coupled magnetically via the air gap and moving they form a tuned AC permanent magnet linear electro-magnetic generator.

Abstract: A device for erecting roof comprises a portable platform of a size and weight easily lifted and manipulated by a single worker. The platform is configured to fit over the upper ends of the chords of a truss that has already been secured in place so that it can support a worker. By using a pair of the devices, the worker can move from truss to truss, from one end of the roof to the other. The worker moves the device that is not currently in use from one truss to the truss that he has just finished securing in place, and then steps from the device currently in use onto the other device so that the worker is supported on the newly secured truss, in position to guide a new truss into position so that it can be secured. This process is repeated until all trusses have been secured.

Abstract: The present invention 10 discloses an emergency descent system for a tall building 12. The high rise emergency descent system is comprised of at least one track 18 fixedly attached to the exterior of a building 12 and a jumpsuit 20 having an integral harness 22 and descent device 23 connected to the suit by means of a cable 36 that will allow the user 12 to don the apparel having a first preselected drag brake 52 designed for a weight class that is reflected in the size of suit, and, to attach the descent device 23 to the descent track18 and descend to the ground at a controlled rate. A second brake control 26 is provided for allowing the user 16 more individual brake control during the descent down the building 12.

Abstract: A system for mechanically lowering a load from an elevated position to a lower position in a relatively slow and controlled manner using only gravity and frictional forces. The system includes a vertically aligned glide rod, a guide collar that moves longitudinally over the glide rod, two vertically mounted friction rods mounted on opposite sides of the glide rod, a friction collar that moves longitudinally along each friction rod, and a support platform coupled to each friction collar and to the guide collar. The glide rod includes spiral fluted vanes along its entire length upon which the guide collar rides when a load placed on the support platform, allowing the support platform to descend at a safe speed via gravity.

Abstract: Specially designed plates and/or mounting apparatus against and on the standard vertical column used in construction of office structures or other structures including bridges. Each set of plates has a clamping mechanism design to fit around or on the vertical column and has protrusions onto which are mounted a bracket with holes fitting on the protrusions. The brackets project outside the skin of a building and deck planks or pics can be mounted on the brackets to allow workmen to safely walk and work on the deck planks to perform work on a floor-by-floor basis. The system can be dissembled quickly and moved to another part of the same floor, to a new floor, and can be used around the outside corner of a structure or from an overhang or from a horizontal beam. The system can be used with steel tube construction with or without fireproofing.

Abstract: A rapid escape system for buildings including at least one ride unit for a corresponding at least one building occupant to exit via an elevator-type shaft or tube or down the outside of a building at a rapid, predetermined and substantially constant descent velocity. The system includes a lightweight tuned open frame AC linear electromagnetic power generator with one active half fixed to a backpack/ride on which a person or other object/load can be securely fastened, the other active half fixed top to bottom to a tall structure. When coupled magnetically via the air gap and moving they form a tuned AC permanent magnet linear electro-magnetic generator. When the loaded ride unit is dispatched from any height under gravity the resonant Q factor of the generator permits the AC current to rapidly rise, thus inducing the retarding force generated in the air gap necessary to equal the weight of the descending backpack/ride plus load and stabilizing descent velocity to design speed.

Abstract: An escape mechanism for high-rise includes a safety rail and a safety facility. The safety facility is formed in a frame-like shape with an upper frame and a lower frame being constructed by two parallel short steel columns and fixedly connected together by thick steel plates. The upper frame and the lower frame are both movably and pivotally jointed by two parallel connecting rods connected with a transverse shaft, such that the upper frame and the lower frame may make relative movement in parallel with each other. In use, an escapee can be tied with a safety belt carrying a safety facility being sleeved into the safety rail, and scramble down by treading on the retractable pedals attached to the safety rail. In the event of an accidental stumble, the safety facility will be active immediately and thus prevent the escapee from further falling.

Abstract: A suspended scaffolding system and method of use employs a plurality of scaffolding brackets that are hung from the framework of a building under construction to support a plurality of scaffolding planks to form a walkway therebetween. The scaffolding brackets include an anchor assembly, which is specially designed to wrap around the building's framework such that construction workers can complete their work without removing the brackets.

Abstract: A safety net (1) for an opening (11), eg. an open stairwell in a construction site, where the safety net (1) comprises a plurality of straps (2) in a grid arrangement. The straps (2) consist of seat belt webbing or a similar material. The safety net (1) also comprises adjustable anchoring means (4, 14, 25) for anchoring ends of the straps to the perimeter (10) of the opening (11).

Abstract: A scaffold bracket attachment system for securing scaffold brackets to concrete wall formwork. The scaffold bracket attachment system includes a first segment with a plurality of first apertures and at least one second aperture, a second segment 30 extending transversely from the first segment, and an extended portion having at least one third aperture extending downwardly from the second segment 30. A conventional scaffold bracket is attached to the first segment with fasteners extending through the first apertures. The second segment 30 extends behind a vertical board member of a form system and the extended portion is positioned adjacent a horizontal board member of the form system. Fasteners are extended through the second aperture and the third aperture to engage the form system.

Abstract: A construction safety screen (1) has structural capacity to wall predetermined portions of or entire worker-area precipices which include apertures and edges of under-construction buildings and scaffolding against accidental falling. Included are a fastening border (7), fasteners (12, 13, 14, 28, 43), netting apertures (5), netting material (6), visibility coloring and size adaptors. It can be rolled up for light-weight shipping or storage and unrolled easily and conveniently for use and reuse.

Abstract: A retractable scaffold support bracket is provided for mounting on the exterior surface of a concrete wall form. The bracket can be pivoted from an open enabling position to a closed locked position for transport or storage of the form walls. The bracket is of substantially triangular shape comprising a support plate, a vertical rod member, and a reinforcing truss. The vertical rod member is pivotally attached to a mounting base which secures the support bracket to the concrete form wall. The position of the support bracket is maintained in either the open or closed position by a locking element attached to the mounting plate and can be moved switched between the two positions by simply lifting and pivoting the bracket to the desired position.

Abstract: A roofing stage for pitched roofs includes first and second elongated tracks disposed generally parallel to one another. A base bracket attaches a lower end of each track to roof beams. Padded feet extend from a bottom surface of the tracks for contact with the roof. Hooks extend from upper ends of the first and second brackets for attachment to an apex of the roof. A carriage bracket is slidably attached to each track and has a foot support extending therefrom. A platform bracket is slidably attached to each of the first and second tracks above the carriage brackets for supporting a platform therebetween. The movable brackets enable the roofer to property position himself and necessary tools and supplies.

Abstract: The present invention relates to a bracket to hold a boarding ladder to a boat. The invention disclosed provides a quick release mechanism for both the ladder and the bracket itself. A mounting plate is substantially flush with the side of the boat. The bracket slides down into the mounting plate and latches into place. The bracket accepts the upper bar of a boarding ladder and closes a latch over the bar, holding the ladder in place. To remove the ladder, a latch at the top of the bracket is lifted and the ladder can be easily pulled free. To free the bracket from the mounting plate after the ladder has been removed, the latch is lifted and the bracket can be lifted out.

Abstract: A device for rescuing persons and objects from buildings has at least one rescue element that is a rescue rope to be anchored to the ground. A retaining element of a rescue device can be attached to the rescue rope. A winding device for winding the rescue rope thereon is provided. A deflection unit is attached to the rescue rope and has an axle. At least one driving gear is fixedly attached to the axle of the deflection unit for common rotation, and the rescue rope is redirected by 180° by the deflection unit.

Abstract: A suspended scaffolding system and method of use employs a plurality of scaffolding brackets that are hung from the framework of a building under construction to support a plurality of scaffolding planks to form a walkway therebetween. The scaffolding brackets include an anchor assembly, which is specially designed to wrap around the building's framework such that construction workers can complete their work without removing the brackets.

Abstract: An overhanging form system for attachment to a support structure is disclosed. The support structure includes an upper portion and a lower portion, and the overhanging form system comprises a pair of spaced apart hangers, with each of the hangers being adapted to engage the upper portion of the support structure. A pair of frames are provided, with each of the frames having a first portion and a second portion. The first portion of each frame engages a corresponding one of the hangers, the second portion of each frame is adapted to engage the lower portion of the support structure. Each of the frames further includes a first leg and a second leg, with the first leg having an inner end disposed adjacent the first portion of the frame and an outer end disposed outwardly from the first portion of the frame. The second leg extends from the second portion of the frame to engage the outer end of the first leg. A plurality of stiffeners are provided.

Abstract: A safety apparatus for building construction, and preferably for the above-ground construction of a home. The apparatus consists of at least two supports that are coupled directly to the building, either outside an above-ground floor and/or proximate the roof. The purpose of the apparatus is to provide fall protection for a person working on the roof or otherwise above-ground. The main components of the apparatus include at least two supports, planks extending between the supports to define a horizontal falling surface, and guard rails extending between the supports to define a vertical falling surface.

Abstract: A support bracket securing to a vertically extending wall stud and providing cantilevered support of a horizontally disposed plank. An elongated and reinforced support surface includes first and second ends. A channeled base extends from the first end and includes first and second spaced apart sides through which are defined aligning apertures. Upon aligning the sides in seating fashion over a selected wall stud, a mounting fastener enters through a selected aperture in the first side, through the wall stud, and exits through a further selected and aligning aperture in the second side. A first abutment stop projects from a first location of the support surface, a second abutment stop projects from a second spaced apart location and defines, in combination with the first stop, a seating area for receiving the plank.

Abstract: A scaffolding support designed to hang from the top of a wall and further designed to allow a complete roof including a frieze block to be installed without removing the hanging scaffolding support. The hanging scaffolding support is further designed to be removable with a frieze block installed. The hanging scaffolding support includes a wall securing assembly, a vertical support, a horizontal support, and a vertical safety rail support.

Abstract: Structures and apparatuses such as tank cars that have ladders associated therewith are disclosed which have, at the ladder top, two arrays of a plurality of horizontal rungs suitable for a climber using a ladder to horizontally grip by hand. The arrays form an opening through which a climber can leave or access the ladder while gripping the horizontal handgrip rungs of the arrays. The cross-section of the horizontal handgrip rungs is substantially round and should not exceed 2 inches in diameter. The preferred cross-section of the rungs is within the range of from about ¾″-1″ in diameter.

Abstract: A clamp anchors to the edge of a floor slab of a high-rise building for securing a safety line in a fall arrest system. The clamp has a one-piece, generally C-shaped body including upper and lower plates which extend perpendicularly from an end plate to define a mouth for receiving the peripheral edge of the floor slab between the upper and lower plates. Bolts fitted through the upper plate are tightened against the top of the floor slab, thereby grasping the floor slab between the distal ends of the bolts and the lower plate. The upper plate, lower plate and end plate are provided with reinforcing members to resist bending and deforming of the clamp body when under load. A U-shaped eyelet extends down from the end plate for attaching the safety line to the clamp. Handle members on the upper plate facilitate placement, removal and transport of the clamp.

Abstract: An emergency escape veranda apparatus includes a movable veranda member (1) provided so as to form a veranda in a normal state together with a stationary veranda portion (2) projected outside a building. A lowering device (3) makes the movable veranda member (1) descend vertically in an emergency state.

Abstract: A device for erecting roof comprises a portable platform of a size and weight easily lifted and manipulated by a single worker. The platform is configured to fit over the upper ends of the chords of a truss that has already been secured in place so that it can support a worker. By using a pair of the devices, the worker can move from truss to truss, from one end of the roof to the other. The worker moves the device that is not currently in use from one truss to the truss that he has just finished securing in place, and then steps from the device currently in use onto the other device so that the worker is supported on the newly secured truss, in position to guide a new truss into position so that it can be secured. This process is repeated until all trusses have been secured.

Abstract: An adjustable universal scaffold bracket and walkboard ladder holder that absolutely prevents scaffold collapse or disattachment from a building and absolutely prevents a ladder placed against a walkboard from slipping sideways. A safety scaffold and bracket is provided with a safety walkboard with rails that also contains a positive means of preventing ladder slip. Vertical supports can attach top and bottom to the building or work under construction. Hold brackets that can be raised or lowered slide up and down the vertical supports. A walkway sits on the hold brackets and is positively held in place by pins. The hold brackets can be equipped with vertical arms in the front so that posts can be place on them to form a place to put a guard rail. In addition a ladder can be optionally leaned against the walkway and secured by additional stay bolts into the walkway to prevent horizontal slipping.