Seco Heavy-Duty Column Clamp The Seco 4852-16 Heavy-Duty Column Clamp is a robust mounting solution designed for securely attaching 5/8" x 11 survey instruments to structural columns in industrial and construction environments. Built for stability and versatility, it provides a reliable platform for precise instrument setup where traditional tripods or ground mounts are not suitable. The adjustable column allows both vertical movement and rotation , enabling accurate instrument orientation with up to 12 inches (30.48 cm) of height adjustment . A heavy-duty ratchet strap system ensures a secure connection to both round and square columns, delivering high-strength stability in demanding field conditions. Constructed from structural aluminum with stainless steel hardware, this clamp is engineered for long-term durability in industrial surveying applications. Key Features • Supports all 5/8" x 11 threaded survey instruments • Adjustable column with 12" (30.48 cm) height range • Column rotates and adjusts vertically for precise instrument orientation • Includes 2" x 10 ft (5.08 cm x 3.05 m) heavy-duty ratchet strap • Rated strap capacity: 2200 lb load • Compatible with round and square columns • Structural aluminum body with stainless steel hardware • Centerline offset: 15" (38.1 cm) from stud to column