Molded sectioned riser

摘要: A riser formed from a plurality of curved cylindrical segments with vertical side edges having mating vertically tapered projections and slots brought into interlocking engagement to pull confronting surfaces together as the elements become increasingly mechanically engaged. The are assembled by sliding protruding element one segment slot an adjacent segment. When sufficient joined horizontally complete ring except for last pair edges, is warped align opposite end slot. Thus aligned, final then slipped while un-warping forming remainder until top bottom all aligned.