Profile: C R Longley & Co., Ltd. specializes in supplying pre-cast concrete products. Beamshield plus is a rigid insulation unit manufactured from lightweight, closed cell EPS, intended for use in suspended ground floors in conjunction with pre-stressed concrete T beams, closure blocks, perimeter blocks and a structural screed. Hollowcore floor planks are pre-cast concrete elements with continuous longitudinal voids providing a lightweight section. They can be supported on masonry or steel, and can be used in domestic, commercial & industrial applications.