Mathematical Problems in Engineering / 2015 / Article / Tab 4

Research Article

Performance Requirements on Remodeling Apartment Housing and TOPSIS Evaluation

Table 4

Summary of remodeling design solutions.

ItemsThe subject status for remodelingAlternative method—CEM AAlternative method—CEM B

Sectional view of the installed pipe

Features of the construction methodA sewage pipeline is installed on the ceiling of the household in downstairsRepair of existing shaft space; piping the sewage pipeline in subject floor by constructing the additional 50 mm thick flooringShaft removal; sewage pipeline buried in a noise-proof wall

Major limitations of the techniqueDifficulty in maintenance and issue of noise occurrenceEasy maintenance and relatively less noiseEasy maintenance, perfect noise blocking, and increase of useful workspace due to reduction in shaft space