Replacing An 8’ x 6’ 500+ Pound Thermo Pane Glass Window Over 65’ Up

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With the manipulator securely fastened to the glass the glazers make way for the defective glass to be removed.

Situation:

There is a defective window in the now under construction 7- story medical rehab building in Greenfield, WI. No biggie right? Just slap a new one in.

Well, the size of the window is 8’ x 6’ and weighs in at over 500 lbs. The broken window is on the 5th floor about 65ft. Up and is partially obstructed by an overhang. The window will not fit into the building for an inside out replacement so it will have to be installed from the outside. This is how it was initially installed by a tower crane which has been disassembled and is long gone.

Does anyone have Spiderman’s number? Perhaps he could install the replacement window.

The contractor contacted Stevenson Crane who has a long reputation for coming up with clever and safe solutions when ever put to the challenge, and word had it they possessed experience with glass manipulators- a big plus from the contractor’s view.

Recognizing the growth in glass & non-porous building exteriors, Stevenson Crane recently took delivery on the Jekko MR 800.4 Hydraulic Glass Manipulator. Designed to pick up a panel weighing up to 1760 lbs. with 8 vacuum lifters, controlled via a hydraulic activation system and fitted with a dual vacuum system, this was the right tool for the job.

The glass manipulator attaches quickly & easily to 4 Jekko spider crane models fitted with matching plugs and connectors. Unfortunately the Jekko crane with the tallest reach capability of 47’7” fell 18’ short of the needed height.

Really?

Stevenson Crane’s engineers searched for a piece of equipment that would meet the lifting height requirement.  With a maximum lift height of 81’ and max weight of 11,000 pounds Manitou’s MRT 2550 was more than adequate. Mantiou boasted about their RECO attachment recognition system which detects when an attachment has been properly installed, automatically applying the appropriate load chart and safe operation zones. Would the Jekko glass manipulator properly interconnect and interface with the Manitou? Tests were performed. Yes it worked!

One more hurdle, how to attach the manipulator to the MRT2550. This time Stevenson Crane’s engineers designed and built an interface fixture to fit between the MRT2550 and the glass manipulator. This fixture had to be precise as it was the base calculation for the manipulator to:

  • Activate 8 vacuum lifters and raise the window to specified height
  • Orientate the window to the proper position; up to 6 axes
  • Place the window in the frame
  • Remotely release all 8 vacuum lifters at once

End Result:

The Stevenson Crane Dynamic Duo of Manitou MRT2550 and Jekko glass manipulator performed the task beautifully. In fact this is the only published article of a glass manipulator installing glass with the capability of reaching 81’.

The MRT 2550 fitted with a glass manipulator was tasked to remove a defective pane of glass and replace it with a new one about 65 in the air

The MRT 2550 fitted with a glass manipulator was tasked to remove a defective pane of glass and replace it with a new one about 65 in the air.

Greenfield WI outside overhang

Greenfield WI outside overhang.

It is almost hard to tell that there is a special interface fixture to enable the manipulator to be attached to the MRT2550

It is almost hard to tell that there is a special interface fixture to enable the manipulator to be attached to the MRT2550.

 

Eight vacuum cups securely lifted and held the 6'x8' 500 pound pane of glass in 10-15mph winds.

Eight vacuum cups securely lifted and held the 6’x8′ 500 pound pane of glass in 10-15mph winds.

With the manipulator securely fastened to the glass the glazers make way for the defective glass to be removed.

With the manipulator securely fastened to the glass the glazers make way for the defective glass to be removed.

Out with the old… glass that is

Out with the old… glass that is.

The defective glass is loaded on the truck, and you can see the new pane staged in the background.

The defective glass is loaded on the truck, and you can see the new pane staged in the background.

The manipulator is getting ready to pick up the new pane of glass for installation.

The manipulator is getting ready to pick up the new pane of glass for installation.

Six glazers 3 inside and 3 outside in lifts are on hand to ensure a smooth & safe installation.

Six glazers 3 inside and 3 outside in lifts are on hand to ensure a smooth & safe installation.

The glazer inside on the scissor lift gives direction to the glazer outside in the aerial lift to make final fit adjustments via the remote control.

The glazer inside on the scissor lift gives direction to the glazer outside in the aerial lift to make final fit adjustments via the remote control.

The glazer outside in the aerial lift checks the specifications to make adjustments via the remote control- note safety first with the tie offs.

The glazer outside in the aerial lift checks the specifications to make adjustments via the remote control- note safety first with the tie offs.

The MRT 2550 was an excellent choice by Stevenson Crane's planners plenty of lift power, more than enough height, and the rotating- feature allowed one location operation for all tasks.

The MRT 2550 was an excellent choice by Stevenson Crane’s planners plenty of lift power, more than enough height, and the rotating- feature allowed one location operation for all tasks.

Look ma no hands, I just like this shot and wanted to include it.

Look ma no hands, I just like this shot and wanted to include it.

The Stevenson Crane team was able to complete this project on-time & on-budget. If you have any questions about this blog or have your own lifting project(s) coming up please contact Stevenson Crane at 630-972-9199 check out https://stevensoncrane.com or leave your comments below. Please consider sharing this blog with colleagues who might find it helpful.

Keep an eye out for future Stevenson Crane blogs!

Stevenson Crane, Rigging & Heavy Haul is a national leader in rigging & heavy haul, crane & aerial lift rentals, crane sales, crane service, & aerial lifts since 1989.

Contact Stevenson for hassle-free consultation & quotation.
StevensonCrane.com

630-972-9199

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