The S-80 HF (high float) and S-85 HF telescopic-boom aerial work platforms are designed to “float” on sensitive surfaces, such as sand and turf. Lifts are equipped with air-filled 41/18LL x 22.5 20 ply tires. The S-80 HF has a working height of 86 feet with 68 feet 6 inches of outreach. The S-85 HF has 91 feet working height with 72 feet 6 inches of outreach. Both units have a 74-horsepower Tier 4-F diesel engine. The lift basket has a 6-foot dual entry or an 8-foot tri-entry platform with side-swing gate. The models have a dual lift capacity of 600 pounds unrestricted and 1,000 pounds restricted. Automatic envelope control causes the boom to retract it reaches its operating envelope. A load sense cell continuously checks the weight in the platform and limits the operating envelope to match the load chart.