This product is used to conceal unsightly posts and beams (often steel and concrete). Also to conceal services such as sewer & stormwater pipes and electrical wiring.
The paired components have engaging mortise and tenons which are assembled on site with glue or similar adhesive. This operation takes only minutes and the end result is indistinguishable from solid post/beams. The u-shaped beam boxes do not require assembly.
AAH will need to know the internal size required and the preferred species.