Lifting brackets from Hanes Supply sport eccentric cams (small grey circular features) easily turned by hand to locate their off-center holes closer or farther apart from each other. This accommodates the hole alignment on pieces to be lifted.
Turbine towers can be a dickens to lift and put into place. Engineered Lifting Technolgies, a subsidiary of Hanes Supply Group, Buffalo, NY, says it can make the task a bit easier with its tower-erection equipment. The system consists of all necessary brackets, rigging, and hardware for installing towers. The equipment received a patent that covers its lightweight tower-lifting brackets, tipping brackets, rigging, and hardware.
The system is unusual in that the lifting brackets are relatively small, made of high strength material, and significantly lighter in weight than conventional brackets, according to the company. The configuration allows two-bracket lifting that does not require an upper spreader bar. Brackets for the lower end of a tower section are a lightweight compact design making them safer to install and remove. (The brackets are bolted to mounting holes in a tower’s bottom flange so it can be lifted and tipped into place). And because no two anchor-bolt holes in the tower are ever precisely spaced, an eccentric cam in the bracket allows adjusting the holes closer or farther apart. This adjustment for hole separation allows using the brackets on several tower sections without resorting to slots or oversized holes. The system will be standard and stocked for tower sections for up to 140,000 lb. Larger sizes will be available on request.
Filed Under: Construction
