Series 30 loft blocks are designed to clamp to the bottom of steel wide flange beams. Single-groove sheave rotating on sealed precision ball bearings is fully enclosed in a housing of heavy steel side plates welded to base angles.
Each series 30 loft block is fabricated to fit a specific beam size. Mounting holes are located such that the lift line is positioned at the center of the beam. Offset clips and bolts are supplied for attachment to the support structure. Beam flange width and thickness must be specified at time of ordering.