Abstract: A frame support which can be used for inspection platforms, plant and equipment, prefabricated buildings and structures. The installation is carried out in three main stages, commencing with the fixing of a lightweight threaded base within a prepared hole. A load-bearing member is then attached to the base and adjusted by means of the thread and a threaded collar. Finally the threaded base, the threaded collar and a protrusion of the load-bearing member are substantially encased in concrete or a chemical compound to complete the installation.

Abstract: A prefabricated stairway module (10, 11) comprises a first step and a second step, each step (14) having a tread member (13) and a riser member (15). The stairway module further has fixing means (31) for fixing the module to a sloping surface on which it is laid. The steps in a module may be connected to each other by a rigid or flexible bridging member (19), and the tread member (13) may be curved. Different designs and configurations of the prefabricated modules may be combined into a stairway assembly, the modules which can be chosen according to the gradient of the underlying surface on which the stairway is to be constructed.

Abstract: A prefabricated staircase module (10, 11) comprises a first step and a second step, each step (14) having a tread member (13) and a riser member (15). The staircase module further has fixing means (31) for fixing the module to a sloping surface on which it is laid. The steps in a module may be connected to each other by a rigid or flexible bridging member (19), and the tread member (13) may be curved. Different designs and configurations of the prefabricated modules may be combined into a staircase assembly, the modules which can be chosen according to the gradient of the underlying surface on which the staircase is to be constructed.

Abstract: A method of chemical analysis of a sample in solution in which the optical density of the solution is modified by addition of a dye to the solution, and the modified optical density is utilized in determining the concentration of the sample in the solution. That determination is effected by measuring the optical density of the dyed solution and applying a value thereto, and then comparing that value with a predetermined value which corresponds to a particular sample concentration. The actual sample concentration is assigned a value in accordance with the results of that comparison, and that assigned value is employed in determining the concentration of a particular element in the sample by spectral analysis. Apparatus for carrying out the method includes a first spectrophotometer for determining the optical density of the sample solution, and a second spectrophotometer for applying a value to the concentration of the element of interest in the atomized sample.