Design Calculations of the Hurricane Moorings at Naval Station, Mayport, Florida,
Abstract
These fleet moorings are in a specialized category because they will be used to moor vessels during a hurricane. There will be three moorings that will accommodate 22 crafts ranging in size from LCM to YON that are assigned to the NAVSTA. Location of the moorings is on the east bank of the St. John River, west of Blount Island. Bathymetry of the anchorage area and soil conditions at the anchor location has to be confirmed by a site survey. Because the moorings are a survival type, the 100-year extreme event will be used for the design criteria. Therefore, highest, fastest mile design wind will be 80 mph. The current will be 1.5 knots. These environmental events generated a maximum static hawser load of 32 kips and a maximum dynamic hawser load of 55 kips. The final design is a free-swing riser type mooring. Each mooring will have four ground legs consisting of 2 inch chain so that each opposing leg can be proof loaded and verified to the design load. The anchors will be Navy stockless with stabilizers and with the flukes fixed open to 50 deg. There is a 10 kips sinker connected to the ground ring. The mooring systems will be cathodically protected with zinc anodes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA168459
Entities
People
- C. A. Hubler
Organizations
- Naval Facilities Engineering Systems Command