than the other three because only the light fixtures, electrical wiring and conduits were

removed before the demolition of the building. The 3.1 hours required to remove interior

partitions from the 100% mechanically demolished barrack involved recovery of the

large support columns only.

 The same amount of time was needed for the salvaging of the interior finishes and

framing for the 100% Manual and the 44% Manual scenarios but a decreased amount of

time was needed in the 26% Manual scenario. This decreased time is explained by the

fact that the columns and wall studs were cut using chainsaws to speed the process of

deconstruction and so that the second story floor could be dropped onto the first story

floor for deconstruction.

 As shown in Table 3-1, less time was required for removal of the roof, walls and

floors of the barracks with increasing use of mechanical methods. This is true with the

exception of the removal of the second story floor. The removal of the second story floor

took longer in the 26% manual scenario than in the 44% manual scenario although it still

took less time than the 100% manual scenario. In the 44% Manual scenario, the second-

story floor was cut into ten-by-ten foot pieces and dismantled on the ground, whereas the

second-story floor in the barrack subjected to 26% Manual methods was dropped onto the

first-story floor and dismantled. The two different methods of removal for the second

story floor in the 26% and 44% manual scenarios were experimental to determine the

fastest way to deconstruct the second story floor. It was found that it is faster to remove

the second story floor in ten-by-ten foot pieces because it is easier to remove the wood

when it is in smaller pieces. The time for the removal of the first- story wall also varied

greatly between the 44% Manual and 26% Manual scenarios. The former, involving