Research Journal of The University of Zagreb, Faculty of Civil Engineering

Organization, Technology & Management in Construction: An International Journal
ISSN 1847-5450 print / ISSN 1847-6228 online
udc 62:658(05)

Abstracting/Indexing: The papers published in Organization, Technology & Management in Construction: An international Journal are abstracted/indexed by: EBSCO, INSPEC, ProQuest Science Journals

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8. Olumide Afolarin Adenuga,Gboyega Sotunbo:

An Assessment Of Time Variation In Solid And Hollow Floor Construction In Lagos State


The choice of construction method employed for constructing suspended slabs in buildings tend to impact significantly on the delivery time of building project. Thus, this study aims at assessing the impact of various construction methods on duration for constructing hollow and solid floor slabs in buildings in Lagos State, Nigeria. The research design for this study was a survey design approach and the populations of the study were professionals involved in construction projects; Architects, Civil Engineers, Builders, Quantity Surveyors, Building Services Consultant and Contractors. These are the major participants in the construction industry in Lagos State, Nigeria. The analysis is based on 46 (forty-six) returned questionnaires out of the 60 (Sixty) questionnaires administered. The data from the questionnaires were analyzed using descriptive statistics tools such as frequency, percentage mean ranking while the hypothesis were tested with a paired sample t-test tool. It was found that the systems or methods of slab construction well known to the respondents are cast in situ, precast and semi-precast. The Cast in-situ beam and slab construction ranked as the most frequently adopted method followed by flat slab, hollow clay pot and waffle slab construction. In terms of construction time, placing reinforcement and construction of formwork takes more time than other processes in solid slab construction while in construction of reinforced cast in situ concrete hollow slab; formwork construction, placing hollow bricks or blocks or moulds on formwork and curing concrete takes more time than the other processes involved. The study’s major recommendation is that, adequate and careful analysis should be conducted before taking a decision on the choice of floor system been adopted for any project.