PRODUKTIVITAS DAN BIAYA ALAT MUAT BONGKAR EXP-2000

Abstract

Loading  and unloading works are intermediary activities in the logging operation.  The logs after being felled/cut down in the forest will be of economic values when they cannot be brought to the inherent processing industrie. Light­weight and small­size logs favor manual work in their handling as  long  as  man power  is available. Heavy­weight and  large­size  logs, however,  necessitate an auxiliary heavy­duty equipment,  since the manual work is sometimes no longer effective for loading­related operation, e.g. hoisting, placing, regulating their position, etc. The unloading of such logs, conversely, turns out to be easier, but can pose a dangerous threat. Therefore, cautious care is necessary.

In dealing with loading/unloading problems as such particularly in plantation forest,  a special equipment that is simple in design has been devised, called as Exp­2000. The equipment, wich is powered by 11­HP's diesel engine, can also perform the skidding­operation.  The overall cost in devising the Exp­2000 's equipment  was Rp. 50,000,000. The trial test as performed on the equipment revealed the following results:                                                                     .

1. The average loading and loading productivities were consecutively 9.54 m³ per hour and  13.18 m³ per hour.
2. Cost of loading as well as unloading was Rp. 1.597,48 per m³.
3. The average skidding productivity was 0.5053 m³.hm/hour with skidding cost at Rp 30,160 per m³.

The skidding cost might be reduced to Rp.  21,165 per  m³  and concurrently the productivity increased to 2.25 m³per hour,  if the more powerful diesel engine,  e.g.  25 HP were used.