Alshor Plus was developed and re-engineered from RMD Kwikform’s proven Alshor system, the most noticeable difference being the increase in safe working load leg capacity from the original system’s 80kN to 120kN. The uprated system incorporates a number of new and improved components, accessories and features, resulting in it being faster to erect and easier to modify in-situ. This, P C Harrington had already discovered on an earlier Alshor Plus contract, minimises site delays and cuts construction costs.
A wider range of legs ranging in length from 1.5 to 4m increases flexibility and reduces the number of components used to build tall structures. Pocket extrusions are attached to the legs at 500mm centres to give a high level of frame position flexibility. A simple, single-action simultaneously connects and secures all four blades of the frames to the leg pockets, making a major contribution towards Alshor Plus’ unrivalled speed of erection. An extended selection of short and long jacks boost the system’s flexibility whilst the number of loose parts has been minimised in order to benefit site storage, inventory control and the system’s overall cost effectiveness.
The many design features introduced with Alshor Plus include the use of aluminium spigots to provide fast and secure leg to leg connection, while the blade-and-pocket connection between the frame and the legs allows the frame to be installed or removed once the system is assembled. Other innovations include extended grooves in the long screw jacks that self clean the jack making adjustment quick and easy as well as preventing the jack from rotating during adjustment.
The most significant addition to the system however is an all new quick strike mechanism that enables the load to be removed from the leg during striking with a few blows from a claw hammer. Compare this with what can be up to two dozen heavy - and inevitably damaging - blows with a sledgehammer required by other systems. This feature alone results in significant labour savings and consequent reductions on whole use cost.
