Skip links

DIGESTER ROOF

After failing to comply with regulations and an industrial accident, this digester structure sat idle for 2 years before PDI got the call to remove the roof. The goal of the demolition project was to safely remove the entire roof in one crane lift without damage or impact to the surrounding structure(s).

The digestor was not compliant with regulations and thus, gases built up and blew the roof off. With no way of knowing the exact weight of the roof, our engineering team analyzed old drawings and examined the material composition of the structure to accurately predict the size of equipment needed to hoist the roof off the structure. Those calculations had to be spot on as the size of the crane was selected based on the predetermined weight of the lift.

With a radius of 60′ and weighing in at over 80,000 lbs, our team brought in a large 600 ton crane to hoist the roof off the structure. It was assisted by a PDI excavator who gently guided the roof off, leaving the walls and structure intact. Teamwork at its finest.

Digester roof removal

PROJECT HIGHLIGHTS

This project was valued at $162,000

This project commenced in February 2021 and was completed in less than a month by March 2021

This project commenced in February 2021 and was completed in less than a month by March 2021

PDI IN ACTION

noun comment 106852

PDI’s in house engineer along with our sub-trade Western Mechanical, focused on a methodology that allowed the bridge to be rolled off of the existing piers to minimize the risk of debris falling in the waterway, and to give easy access to PDI’s equipment at the shoreline for material separation.

RELATED PROJECTS

RETURN TO ALL PROJECTS

FEATURED VIDEOS

Watch Priestly Demolition do the unthinkable—and take down the entire Gardiner Expressway Eastbound Ramp in just 5 weekends. This is a fresh new look at the masters of bridge demolition. See drone footage, time-lapse video, and project highlights of this rapid demo from the PDI team, plus a behind the scenes look at how this project plan comes together, and the people who make it happen.

Demolition of the Trafalgar Road and 401 Overpass Bridge

This Rapid Bridge Demolition is different from what you’ve seen before. Watch as PDI crews demolish the structure from both the top and bottom simultaneously. Featuring interviews with our crew.

The Kobelco 1600, A Gamechanger for PDI

This heavily modified, Kobelco 1600, 200T beast will allow us to take down higher buildings than ever before.

Victor Mine, Ontario’s First and Only Open Pit Diamond Mine

Must see demolition of the Victor Mine, where calling in for backup isn't an option. Priestly Demolition flies in additional heavy equipment by Hercules aircrafts, to complete the project in this remote location near James Bay in Northern Ontario.

Underwater Demolition of the Glen Miller Dam 3

Priestly Demolition dives into the murky waters of the Trent Severn Waterway—hammering and removing concrete 16 feet below the surface. This underwater demolition provides a whole new set of challenges, but that's nothing new for PDI and the bigger the challenge, the more excited we get. Watch now to see how it's done.

Must See—New Kind of Demolition for Priestly Demolition

Demolition isn't always about smashing buildings to the ground. See how Priestly Demolition is taking the opposite approach for this project.