GSTM- 4390RT / GSTM- 5390RT Large platform with durable diamond-plate aluminum flooring. A single 60 in (1.52 m) multi-position slide-out extension deck, on the front of the machine, comes standard. A second 48 in (1.22 m) slide-out extension deck, on the rear of the machine, is available as an option. Rear platform railing can be removed for easier loading and unloading of materials. Slide-out engine tray allows easy access to components. Automatic leveling hydraulic outriggers are standard on the GS-5390 RT, optional on the GS-4390 RT. Standard Features GS-4390 has 49 ft (14.9 m) working height and GS- 5390 RT has 59 ft (18 m) working height 1,500 lb (680 kg) load capacity Positive traction-controlled four-wheel drive 50% gradeability Proportional drive Two-speed lift functions Troubleshooting diagnostics Two self-closing entry gates Foam-filled tires AC wiring to platform Descent alarm Tilt sensor with an audible alarm Horn Hour meter Options and Accessories Motion alarm Dual flashing beacons Propane tank kit (single and/or additional) Dual slide-out extension deck package (front and rear) Hydraulic oil cooler 2,000 watt generator (110 volt/60 hz) Automatic leveling hydraulic outriggers (GS-4390 RT) Non-marking tires Standards Compliance ANSI/SIA A92.6 CSA CAN3-B354.2-M82 CE compliance option AS 1418.10