Forensic Engineering Analysis of a Commercial Dry Storage Marina Reinforced Concrete Runway Slab




heavy pavement, marina, heavy wheel loads, design assumptions, pavement deflections, reinforced concrete pavement, relieving platform, auger cast piles, subgrade support, finite element model


An important element of a commercial marina is the landside site work behind the bulkhead. At many dry storage marinas, boats are launched, retrieved, and handled by large forklifts with axle loads up to 100 tons. In this case, the owner of a commercial marina sued the general contractor, alleging numerous design and construction defects in the reinforced concrete “runway” between the dry storage buildings and the bulkhead. This auger cast pile supported structure served as a relieving platform carrying vertical loads below the depth of the adjacent bulkhead. Some of the observed deficiencies were random cracking, joint damage, excessive edge settlement, and readily visible live load deflections. This paper presents the methods used to investigate the design and construction of this specialized structure. A finite element model (FEM) was used to review the original design intent and help establish the cost to cure. The original design of the runway and pile foundations was found to be inadequate.


J. P. Bachner, “Recommended Practices for Design Professionals Engaged as Experts in the Resolution of Construction Industry Disputes,” 1 October 2010. [Online]. Available: [Accessed 10 1 2021].

Waterfront Facilities Inspection Committee, Waterfront Facilities Inspection and Assessment, R. Heffron, Ed., Reston, VA: American Society of Civil Engineers, 2015, pp. 139-307.

Wiggins Lift Co. Inc., Model W520M2XL Equipment Data Sheet, Oxnard, California: Wiggins Lift Co. Inc., 2004, p. 1.

ASTM International, ASTM Standard C805, 2013, “Standard Test Method for Rebound Number of Hardened Concrete,” West Conshohocken, PA: ASTM International, 2013.

ACI Committee 117, Specifications for Tolerances for Concrete Construction and Materials and Commentary, Farmington Hills, MI: American Concrete Institute, 2006.

Naval Facilities Engineering Command, Atlantic, Seawalls, Bulkheads, and Quaywalls,

MIL-HDBK 1025/4, Norfolk, VA: Department of Defense, 1988.

H. G. Poulos and E. H. Davis, “Elastic Solutions for Soil and Rock Mechanics,” 1974. [Online]. Available: [Accessed 08 Apr. 2021].

U.S. Army Corps of Engineers, “Soils and Geology Procedures for Foundation Design of Buildings and Other Structures (Except Hydraulic Structures), UFC 3-220-03FA,” 2004. [Online]. Available: [Accessed 10 Apr. 2021].




How to Cite

Stewart, David. 2021. “Forensic Engineering Analysis of a Commercial Dry Storage Marina Reinforced Concrete Runway Slab”. Journal of the National Academy of Forensic Engineers 38 (1).