Attachment 2 Buoy_Anchor_3pgs.pdf

This document contains technical design specifications and detailed drawings for buoy maintenance and anchor systems for the Sitka Ranger District of the Tongass National Forest.

The document consists of three detailed engineering drawings specifying components and construction requirements for a typical buoy and anchor system. The first drawing illustrates the overall buoy and anchor system configuration, showing a ring assembly with dual lifting pad eyes secured with stainless steel wire shackle pins, connected via zinc-coated chain of variable length to a concrete anchor block on the sea floor. The second drawing provides specifications for a small concrete anchor block with dimensions of 4 feet by 3 feet by 3 feet, detailing three hoops (Hoops A, B, and C) and an anchor bail. Key concrete specifications include a compressive strength of 3,000 PSI at 28 days (Class A concrete per ASTM C150 Type II), with reinforcing steel of FY 60,000 PSI that must be epoxy-coated and galvanized per AASHTO specifications. The anchor bail is fabricated from ASTM A36 steel. The third drawing provides detailed dimensions for the hoops and anchor bail components, including Hoop A (4 required per anchor), Hoop B (3 required per anchor), Hoop C (4 required per anchor), and the anchor bail with specified radii and overall dimensions. All exposed structural steel must be galvanized, and the dry weight of the anchor is approximately 2.4 tons, with an available anchorage force of approximately 1.4 tons when installed in salt water.