Hog Slat Inc. Newton Grove, NC USA October 2019 11 Ventilation Systems Pulley Systems: The ceiling inlet and actuation system can be set up to run in a 1:1 or a 2:1 pulley system. The 1:1 configurations allows for shorter open/close times. The 2:1 configuration allows for a greater load capacity. Figures 17, 18, and 19 provide an explanation of both systems. 1:1 Ratio (Figure 17) 1:1 Ratio Direct Pull (Figure 18) 2:1 Ratio (Figure 19) For each (1) inch travel of the machine there is (1) inch travel of the Load. 1,000lb max each side = 2,000lb total load. For each (2) inch travel of the machine there is (1) inch travel of the Load. 2,000 max each side = 4,000lb total load 2,000lb max 2,000lb max 1,000lb max 1,000lb max 2,000lb max For each (1) inch travel of the machine there is (1) inch travel of the Load. 2,000lb one side total load
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