First, you must state specifically to the truck manufacturer or trailer builder what loads are to be carried, and have some idea on load distribution, type of operations--such as a city operation with plenty of stop and go driving, terrain-- such as mountainous or level, climate, trade policy and expected annual mileage. In short, you must be specific as to the truck''s job application.The truck and the trailer builder design the braking system based on axle loading. Overloaded vehicles will not comply with government standards, nor will they be in proper balance. To ensure the brake lining is not overrated for the loads that the axles will carry, you should specify a specific gross axle weight rating (GAWR) for their axles.Secondly, you must ensure that the brakes on the powered vehicle are compatible with the brakes on the trailer. This applies to foundation brakes and friction materials, to air transmission times and to proper piping and valves. Trends in air brake systems

DERRICK: 147''; 1,044,000-lb hook load capacity.BOP SYSTEM: One 13 5/8", 5,000-psi annular; two13 5/8", 10,000-psi double ram type; Regan KFDJ diverter.CRANES: Two Link Belt 218A, 33 t @ 30''.MOORING: Four 10,000-lb anchors, four anchorwinches and four 2,500'' lines.REMARKS: Formerly Arethusa Heritage.WORK AREA: Indonesia.OCEAN SOVEREIGNCONSTRUCTION: Far East Levingston Shipyard, Singapore, 1981.REMARKS: Formerly Arethusa Sovereign.BOP SYSTEM: One 21,", 2,000'' psi annular diverter.DRILLING EQUIPMENT: Prime movers--five Cat. D-399; Top Drive--Varco

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