A modular platform system includes a base module and at least one extension module. One side of the base module has a recess for receiving a connector on one side of the extension module to connect the extension module to the base module. The extension module may include a recess for receiving a connecting member on a second extension module to connect the second extension module to the extension module.

A safety system alerts individuals to the presence of a floor opening in a floor grid or work platform decking that is supporting the individuals. The safety system is a passive safety system that is operatively connected to a stationary first floor panel that is adjacent a second floor panel. The safety system is automatically operated to deploy a signal flag above the first floor panel (and activate an audio warning signal) when the second floor panel is removed, exposing a floor opening adjacent the first floor panel. The deployed signal flag alerts individuals on the floor grid or work platform decking to the presence of the floor opening.

A safety system alerts individuals to the presence of a floor opening in a floor grid or work platform decking that is supporting the individuals. The safety system is a passive safety system that is operatively connected to a stationary first floor panel that is adjacent a second floor panel. The safety system is automatically operated to deploy a signal flag above the first floor panel (and activate an audio warning signal) when the second floor panel is removed, exposing a floor opening adjacent the first floor panel. The deployed signal flag alerts individuals on the floor grid or work platform decking to the presence of the floor opening.

A lapboard for a safety deck assembly, the safety deck assembly comprising a upper deck formed of one or more decking panels having a substantially planar upper surface and an elevated support assembly comprising a number of elongate legs, a base for each elongate leg to form a foot, a head for each elongate leg to at least partially support a decking panel relative to an upper end of the leg, the lapboard comprising a substantially planar upper surface and at least one receiving opening formed in an underside of the lapboard to receive a portion of the head to locate the upper surface of the lapboard substantially coplanar with the upper surface of the decking panels, the lapboard being smaller in width than the decking panels.

A lapboard for a safety deck assembly, the safety deck assembly comprising a upper deck formed of one or more decking panels having a substantially planar upper surface and an elevated support assembly comprising a number of elongate legs, a base for each elongate leg to form a foot, a head for each elongate leg to at least partially support a decking panel relative to an upper end of the leg, the lapboard comprising a substantially planar upper surface and at least one receiving opening formed in an underside of the lapboard to receive a portion of the head to locate the upper surface of the lapboard substantially coplanar with the upper surface of the decking panels, the lapboard being smaller in width than the decking panels.

A scaffold includes a U-profile beam having an outwardly-open U-profile in which a scaffold platform is releasably hooked by mounting hooks. The U-profile beam has a perpendicular wall delimiting the U-profile and a guiding and fastening groove delimited by inwardly-extending groove reach-behind protrusions delimiting a locking space for releasably locking a locking element reaching behind the protrusions. An anti-lift-out and support element has an anti-lift-out element extending over the hooks to prevent lifting out. A support element fixed to the anti-lift-out element extends perpendicularly from the anti-lift-out element to a support element end for supporting the support element on the wall. The anti-lift-out element has a through-opening designed so that the fastening element moves the locking element toward the fastening element longitudinal axis and perpendicularly to the groove through the through-opening. A method secures scaffold platform mounting hooks against lifting out from a U-profile beam using an anti-lift-out device.

A scaffold includes a U-profile beam having an outwardly-open U-profile in which a scaffold platform is releasably hooked by mounting hooks. The U-profile beam has a perpendicular wall delimiting the U-profile and a guiding and fastening groove delimited by inwardly-extending groove reach-behind protrusions delimiting a locking space for releasably locking a locking element reaching behind the protrusions. An anti-lift-out and support element has an anti-lift-out element extending over the hooks to prevent lifting out. A support element fixed to the anti-lift-out element extends perpendicularly from the anti-lift-out element to a support element end for supporting the support element on the wall. The anti-lift-out element has a through-opening designed so that the fastening element moves the locking element toward the fastening element longitudinal axis and perpendicularly to the groove through the through-opening. A method secures scaffold platform mounting hooks against lifting out from a U-profile beam using an anti-lift-out device.

Disclosed is an arrangement including a staircase as well as walkway systems. The staircase includes a transitional member, and the walkways incorporate grate supports in order to facilitate the connection to adjacent structures. The arrangement also utilizes angled members which are configured with a reinforced flange existing in a dimension that has higher load requirements than the other flange. A novel step configuration is also disclosed.

Disclosed is an arrangement including a staircase as well as walkway systems. The staircase includes a transitional member, and the walkways incorporate grate supports in order to facilitate the connection to adjacent structures. The arrangement also utilizes angled members which are configured with a reinforced flange existing in a dimension that has higher load requirements than the other flange. A novel step configuration is also disclosed.

Disclosed is an arrangement including a staircase as well as walkway systems. The staircase includes a transitional member, and the walkways incorporate grate supports in order to facilitate the connection to adjacent structures. The arrangement also utilizes angled members which are configured with a reinforced flange existing in a dimension that has higher load requirements than the other flange. A novel step configuration is also disclosed.