Comments on: Leaning tower leans no longer…

By: RobertKulinski

RobertKulinski — Tue, 15 Dec 2009 13:58:51 +0000

It’s usually covered in the proposal which is then attached to the contract. Typically, the implosion contractor will find out what size equipment is going to be used to handle and remove the debris and will tailor the blasting plan to suit. Some contractors have medium 40,000 to 60,000 or so lb machines and some of the other contractors have big machines 100,000 lbs +. So, what’s good for one maybe not so good for the other. In the proposal, under the scope of work there will be something like “The implosion subcontactor will fell the structure resulting in debris that can be handled by a (Cat 965, etc. etc.) excavator equpped with a (digging bucket, UP, etc.). The lump sum fee also includes a representative on site post implosion for 3 days to assist the contractor in debris handling operations. Any days over the 3 included shall be billed to the contractor at $___ per day.

By: Newby

Newby — Mon, 14 Dec 2009 21:47:30 +0000

My next question is, how do you define the level of debris breakage in a contract or proposal? What keeps the implosion contractor from saying “Seeyah! I have a plane to catch!” and leaving the contractor (or subcontractor) with a 6 story high pile of crap?

By: admin

admin — Mon, 14 Dec 2009 17:17:48 +0000

Thanks for the science lesson John, and for clarifying what all that meant so that idiots like me can understand it!!

By: john woodward

john woodward — Mon, 14 Dec 2009 17:05:35 +0000

They probably say something like “The mass to weight ratio of the main members were disproportionate to the height and width of the intervening cross members, leading to a smaller than average bio fragmentation both vertically and laterally” (which means we could have done with a bit more dynamite).

By: Newby

Newby — Mon, 14 Dec 2009 16:49:48 +0000

I am confused. When a smaller building in the 5 to 8 storey range is imploded they always use the excuse that “the building lacked the mass and height” to properly fragment the debris. What reason do they use on a project like this when they fail to achieve an adequate level of debris fragmentation?