Con saw & hollowcore

Kildafornia

Hi lads, I need to remove several lengths of hollowcore from the 2nd floor of a building, and we don't have the budget to remove the roof. They are sitting on a steel frame. I was going to try:
Support the floor from underneath with akros
• con saw it along the length (rip cut) into strips say 200mm wide (so each strip is still supported by the frame on each end)
• con saw or angle grind into segments 200mm long (cross cut)
• screw eye bolts into each segment and support off the roof so they don't drop
• feck them out the window into a skip!
This sound plausible? Any tips much appreciated

Mahogany Gaspipe

Kildafornia wrote: »

Hi lads, I need to remove several lengths of hollowcore from the 2nd floor of a building, and we don't have the budget to remove the roof. They are sitting on a steel frame. I was going to try:
Support the floor from underneath with akros
• con saw it along the length (rip cut) into strips say 200mm wide (so each strip is still supported by the frame on each end)
• con saw or angle grind into segments 200mm long (cross cut)
• screw eye bolts into each segment and support off the roof so they don't drop
• feck them out the window into a skip!
This sound plausible? Any tips much appreciated

First off is there blockwork built on any part of the h/c slabs that will be removed? If there is this isn't a procedure that you should be asking the internet about.

If the h/c are free from any manner of integration into any other structural part of the build, its still a big task. I'd suggest decking out the entire area below the h/c with scaffolding, right up against the underside of the h/c.

Do not hang anything off the roof!

moy83

I dont think the consaw will cut all the way through hollow core so would probably need to be kangoed to finish it off . It wouldnt be a massive job for a concrete cutting/drilling company to do and would certainly be worth getting a price on instead of taking on a job like that yourself

Kildafornia

There's nothing whatsoever on the hollowcore, and it's just sitting on the frame. Could anyone reccomend a concrete drilling company, or are we talking google search and hope for the best?

moy83

Kildafornia wrote: »

There's nothing whatsoever on the hollowcore, and it's just sitting on the frame. Could anyone reccomend a concrete drilling company, or are we talking google search and hope for the best?

Where in the country are you ? I'm in galway and there is Concore and Holemaster that I know of

Kildafornia

moy83 wrote: »

Where in the country are you ? I'm in galway and there is Concore and Holemaster that I know of

I'm in Kildare. Anyone heard of [url][/url] ?

mfceiling

Kildafornia wrote: »

I'm in Kildare. Anyone heard of [url][/url] ?

Saw them on site before. Can't comment if they are good or bad?

Intercore in ballybrittas Co.Laois? Not sure if they are still in business or not though.

Kildafornia

Ok cheers for the good info lads

Worriedmind

You need a temporary works design Engineer.

You need to design/provide a crash deck.

You suggest propping the demolished 2nd floor off the 1st floor. I'm going to guess you have no idea whether or not the first floor can support these loads.

Hanging each piece from the roof...? Nonsense.

I'm going to guess there's no PSDP on this project - a project which appears to carry significant risk! As a consulting Engineer I'm sick to the teeth of dealing with rogue contractors like this! Sort yourself out before you kill someone!

Kildafornia

Worriedmind wrote: »

You need a temporary works design Engineer.

You need to design/provide a crash deck.

You suggest propping the demolished 2nd floor off the 1st floor. I'm going to guess you have no idea whether or not the first floor can support these loads.

Hanging each piece from the roof...? Nonsense.

I'm going to guess there's no PSDP on this project - a project which appears to carry significant risk! As a consulting Engineer I'm sick to the teeth of dealing with rogue contractors like this! Sort yourself out before you kill someone!

No need to troll with your exaggerated concern. Pop off your high horse there and read my post properly, or ride off elsewhere. I'm not a contractor, I'm a guy with a house.

Mahogany Gaspipe

Worriedmind wrote: »

You need a temporary works design Engineer.

You need to design/provide a crash deck.

You suggest propping the demolished 2nd floor off the 1st floor. I'm going to guess you have no idea whether or not the first floor can support these loads.

Hanging each piece from the roof...? Nonsense.

I'm going to guess there's no PSDP on this project - a project which appears to carry significant risk! As a consulting Engineer I'm sick to the teeth of dealing with rogue contractors like this! Sort yourself out before you kill someone!

I normally wouldn't bother to reply to such smarmy drivel; but seeing as you're touting yourself as a consulting engineer; one would imagine you'd have the smarts to read through the thread and grasp some rudimentary understanding of the OP's project.

You seem to think that the OP's house has two levels of h/c?
In spite of the OP stating 2nd floor, which I read as 1st floor(maybe the OP can clarify), just how many private houses have you seen having a two vertically separate h/c floor levels?
I'm not sure what kind of consulting engineer would assumes that to be the case.

Worriedmind

I've seen plenty of houses with a first and second (attic level) hollowcore floor. I live in one! So if he's stated that it's a second floor then I'm going to take it that it is in fact a second floor!

Anyway, OP's approach sounds like absolute madness.

jjf1974

During the boom there was all kinds of house's with different levels. A lot of these house's had hollowcore. I cant see how the O.P's idea could work by tying hollowcore to the roof.If he is going to do it himself he should really get some advice from somebody who knows about this kind of work.

BryanF

EXACTLY :

Worriedmind wrote: »

You need a temporary works design Engineer.

You need to design/provide a crash deck.

You suggest propping the demolished 2nd floor off the 1st floor. I'm going to guess you have no idea whether or not the first floor can support these loads.

Hanging each piece from the roof...? Nonsense.

I'm going to guess there's no PSDP on this project - a project which appears to carry significant risk! As a consulting Engineer I'm sick to the teeth of dealing with rogue contractors like this! Sort yourself out before you kill someone!