Abstract:
Prefabrication is defined as the production of entire building, or significant building
constituents offsite in a workshop and transported for assembly to construction site.
Prefabrication is a very beneficial construction approach with widely accepted benefits
including shorter project duration, reduced project cost, improved quality product,
enhanced control of construction activities, improved safety of workers and
environmental friendliness compared to conventional method.
There is a huge gap on the demand and supply of residential houses and quality problem
in our country especially to concrete structural elements & delays in construction of
building projects are common, and its price is not affordable by majority of population. It
is an undisputable fact that, stakeholder’s of construction industry (clients, consultants,
and contractors) do not highly work on prefabrication methods of construction leaving
the construction industry to continue to heavily depend on in-situ construction, which
does not encourage diversity in the method of construction and that’s why most of
construction companies entitled to delay, cost overrun and sub-standard quality
The objective of this study was to assess the effectiveness of precast and cast in-situ
concrete method in building construction projects. The research made use of literature
review of existing work. Questionnaires administered to respondents and interview of
selected stakeholders in the construction industry. The statistical tools used in the
analysis comprised descriptive statistics using tables and graphs. RII was used to analyze
the qualitative data’s, and, the selection of samples from the total population were nonprobabilistic sampling, and selection of stakeholders was purposive.
For this study, the total duration and total cost estimation per cubic meter have been
determined for both prefabricated and cast in-situ concrete construction and
prefabrication is effective in terms of time and cost (have 62.9% reduced time offered and
12% less cost) and have better quality since these materials are produced in controlled
environment i.e. easy for control. Since prefabrication method of construction is a new
method, future research in to the concept of prefabrication should be conducted in order
to solve the misunderstanding of stakeholders and the government and investors should
work together to handle the high demand of home at short period, small budget and
specified quality
