EVALUATION OF THE BARRIERS TO THE USE OF APPROPRIATE CONSTRUCTABILITY PRACTICES ON CONSTRUCTION PROJECTS

Main Article Content

Abimbola Olukemi Windapo
Olabode Emmanuel Ogunsanmi

Keywords

Assessment, Constructability practice, Contractors, Design, Knowledge, Nigeria

Abstract

Within the Nigerian and Sub-Saharan African construction industries generally there has been a lack of research profiling the constructability practices of contractors and possible barriers to the use of appropriate methods. The aim of this study was to assess constructability practices of contractors in construction projects in this context. The objectives were to identify current constructability practices, and to examine the barriers typically affecting constructability practices. Convenience sampling was used to select 19 contractors in Lagos state, Nigeria, who were interviewed using a structured interview protocol. The data collected was analysed using descriptive statistics. Results indicated that constructability practices common to contractors include checking M & E drawings for clashes and errors; site-layout planning; and preparation of schedule/construction programmes. In-situ constructions, crane/lifting equipment, formwork technologies and external scaffolding systems were used during site operations. Barriers affecting constructability practices stem from contractors’ internal conditions, external factors, and project-related factors including design, lack of knowledge in construction methods, and
project size and complexity. The findings have important implications for policy and practice. We recommend public laws making it mandatory for projects to implement constructability reviews and analyses. We also recommend that practice-experienced constructors be employed on projects, and that professional bodies train and educate members on constructability principles and practice for the better management of projects.

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