Container-based relocatable modular buildings for construction site offices in Sri Lanka: Contractors’ perspective

Abstract

The temporary site offices are directly provided by the contractor, and hence, any associated risk is non-transferable. Thus, the contractors should be aware of sustainable, and cost-effective technologies to be implemented to survive in the competitive construction industry. Relocatable Modular Building (RMB) technology is employed globally as a multi-beneficial building technology for temporary shelter purposes such as site offices. Hence, the research aimed to explore the applicability of RMB technology for temporary offices on construction sites in Sri Lanka. The literature synthesis reviewed the modular building concept and RMB technology globally. Following the qualitative approach, the research adopted a survey strategy. Data was collected through seven semi-structured interviews with industry professionals who were purposively selected under several criteria. Further, data collection was limited to container-based RMBs due to the limited availability of RMB varieties in Sri Lanka. Template analysis was the data analysis technique followed. The findings disclosed that RMBs have already been established in the Sri Lankan construction industry. ‘Relocatability’, reusability, high security, larger usable space within limited land space, ability to rent out, and air-conditioned working environment were found as key benefits of RMBs whereas the unbreathable smell of glue in newly fabricated RMB, handling difficulties, the possibility of overturning, initial cost and external body corrosion were identified as key challenges. Significantly, the contractors are recommended to use RMBs for temporary site offices following proposed strategies such as periodic maintenance procedures, systematic site administration, and safety improvements to overcome identified challenges.