Solutions, based on principle of collocating the equations of motion at Chebyshev zeroes, are presented for the free vibration analysis of laminated, polar orthotropic, circular and annular plates. The analysis is restricted to axisymmetric free vibration of the plates and employs firstorder shear deformation theory for the displacement field, in terms of midplane displacements, u, a and w. The eigenvalue problem is defined in terms of three equations of motion in terms of the radial co-ordinate r, the radial variation of the displacements being represented in polynomial series, with appropriate boundary conditions. Numerical results are presented to show the validity and accuracy of the proposed method. Results of parametric studies for laminated polar orthotropic circular and annular plates with different boundary conditions, orthotropic ratios, lamination sequences, number of layers and shear deformation are also presented.

Delivering green construction (GC) projects is not an easy task for inefficient or inexperienced contractor due to added requirements. This paper conceptualizes firm strategies in delivering green projects by focusing on enhancing firm resources. Journal articles with keywords such as ‘green construction’, ‘green project’, ‘sustainable construction’, ‘resources and capabilities’, ‘contractor strategies’, and so forth in the title, abstract or keywords of the publications were reviewed. Articles published from 2000 to 2018 in Scopus database were selected. The current literature on firm resources mainly focused on four assets (personal, financial, technological and organizational) and four capabilities (technical, innovative, managerial competency and collaborative). These assets and capabilities are necessary for contractor firms to survive in the industry. Capitalizing on these resources, this paper proposes seven strategies: human resource strategy, innovation strategy, financial strategy, smart collaboration strategy, environmental pro-activeness strategy, management enhancement strategy and information and communication strategy, for contractor to effectively deliver green project. Using Resource Based View (RBV) and Resource Mobilisation Theory (RMT), a conceptual framework is produced connecting firm resources and Resource Mobilisation Strategies (RMS). This paper shall benefit contractors and academician as it extended the knowledge on firms’ resources and recommend ways to strategize green delivery.

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Contractors are responsible to deliver construction projects as per contract. Past literature highlighted various implications of poor project delivery and as the ones who are responsible to deliver the project, contractors need to plan and strategise to ensure their projects are successfully delivered to the client. This article focuses on identifying the strategies adopted by Omani main contractors to deliver construction projects successfully. Using 48 strategies identified through literature review, a survey has been conducted with 108 main contractors in Oman with top grade level of Oman Chamber of Commerce and Industry (OCCI) to investigate the significant strategies adapted ensuring successful project delivery. The top grade level contractor is on the focus of this research because they are involved as main contractors for construction projects in Oman. Using factor analysis technique, the 48 strategies have been reduced into 28 sub-strategies which are grouped into 7 main strategies. The seven main strategies are: (1) People and subcontractor management, (2) Technology and innovative solutions adoption, (3) Quality, safety and environmental protection, (4) Develop technical capability, monitor and control, (5) Organisational efficiency and financial stability, (6) Legislative compliance and (7) Clients’ satisfaction. This research revisits the successful strategy for project delivery and restructures them to suit the practices in Oman. The strategy can be emulated by contractors in the country and perhaps other Middle East countries, as a way to expedite better construction performance.