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Abeysinghe, G and Urand, D (1999) Why Use Enactable Models of Construction Processes?. Journal of Construction Engineering and Management, 125(06), 437–47.

Kartam, S (1999) Generic Methodology for Analyzing Delay Claims. Journal of Construction Engineering and Management, 125(06), 409–19.

Lee, H, Lee, J and Lee, J (1999) Nonshored Formwork System for Top-Down Construction. Journal of Construction Engineering and Management, 125(06), 392–9.

  • Type: Journal Article
  • Keywords:
  • ISBN/ISSN: 0733-9364
  • URL: https://doi.org/10.1061/(ASCE)0733-9364(1999)125:6(392)
  • Abstract:
    Recently, the top-down construction method has been applied to building construction to secure excavation safety by providing rigid diaphragm walls. Usually, proper and economical formwork systems need to be selected for successful top-down construction. This paper proposes a nonshored top-down formwork system (referred to as NSTD) as a modified formwork system for top-down construction. The NSTD method provides sufficient workspace for excavating under the suspended forms. Upon completion of concrete placement and curing on the ground level slab, the formwork system is lowered to the next floor, and the process is repeated down to the lowest underground floor. The advantages of the NSTD method include a reduction in the excavation duration and an improvement in the quality of the underground concrete work by the hanging-type formwork. A case study was performed to verify the validity of the NSTD by comparing its schedule and cost effectiveness with those of traditional top-down methods.

Leu, S and Yang, C (1999) GA-Based Multicriteria Optimal Model for Construction Scheduling. Journal of Construction Engineering and Management, 125(06), 420–7.

Leung, A W T and Tam, C M (1999) Models for Assessing Hoisting Times of Tower Cranes. Journal of Construction Engineering and Management, 125(06), 385–91.

Lippiatt, B C (1999) Selecting Cost-Effective Green Building Products: BEES Approach. Journal of Construction Engineering and Management, 125(06), 448–55.

Ndekugri, I (1999) Performance Bonds and Guarantees: Construction Owners and Professionals Beware. Journal of Construction Engineering and Management, 125(06), 428–36.

Zouein, P P and Tommelein, I D (1999) Dynamic Layout Planning Using a Hybrid Incremental Solution Method. Journal of Construction Engineering and Management, 125(06), 400–8.