Fixing a miss-drilled beam

[SteveBz]

I'm building a flat-roof extension on my house and I've got a guy helping me. Sadly he's miss-drilled the holes in the joists right next to the wall (within 70 mm) instead of .25 - .4 of the beam length. Actually, it looks very nice, but not in line with BRs. If we move the wiring (and pipes actually) to be in line with BR, how should I patch the holes? Can I put a steel plate over them? What to do.

Steve.

 

[rsgaz]

I think they have been over-sized

Check your span and centre to centre spacing against this table...
(taken from "Building Control Guidance Note, Subject: CEILINGS AND FLAT ROOFS, Timber sizes and construction details")

...to check if they actually are oversized first. (i'm guessing not, now, unfortunately for you.)

 

[Baddegg]

Knock up some wood dowels and hammer into holes with some PU wood adhesive let dry and trim off ends, then as sparky chick said glue and screw 18mm ply either side of the joist 500-600mm past the holes if possible,should be more than adequate for a flat roof

 

[SteveBz]

Check your span and centre to centre spacing against this table...
(taken from "Building Control Guidance Note, Subject: CEILINGS AND FLAT ROOFS, Timber sizes and construction details")

View attachment 43411

...to check if they actually are oversized first. (i'm guessing not, now, unfortunately for you.)

You're right, I've just checked. It's on the edge.

But I'm happy with the solutions suggested here.

 

[telectrix]

what size holes? if only 20mm or 25mm, i'd not bother doing anything. it' s not as if the joists were load bearing.

 

[sean_ork]

what size holes? if only 20mm or 25mm, i'd not bother doing anything. it' s not as if the joists were load bearing.

Why isn't it load bearing ?

 

[SteveBz]

what size holes? if only 20mm or 25mm, i'd not bother doing anything. it' s not as if the joists were load bearing.

Max 25mm for 22mm water pipe.

 

[SteveBz]

Why isn't it load bearing ?

It's a flat roof, but I don't know if that is classified as load-bearing or not.

 

[sean_ork]

It's a flat roof, but I don't know if that is classified as load-bearing or not.

It is .....

 

[PEG]

Depending on the size and placement of holes,a clued up BC inspector,may well not require you to do anything.

Those advocating the bolting of plates,need to know more about the dynamics,of how a beam functions. You may make things worse,by drilling yet more holes,for bolts...

 

[Squid]

Who did the calculations for the beam?

 

[telectrix]

Beam me up, Scottie.

 

[Midwest]

Get the plasterboard up quick, before the BI comes round

 

[sparksburnout]

Get the plasterboard up quick, before the BI comes round

That's by far the most sensible advice yet given. It's just a few bloody holes for goodness sake. How the hell can a flat roof be properly load bearing, is someone going to put an outdoor Jacuzzi on it? You could have had the job done by now.....

 

[Squid]

That's by far the most sensible advice yet given. It's just a few bloody holes for goodness sake. How the hell can a flat roof be properly load bearing, is someone going to put an outdoor Jacuzzi on it? You could have had the job done by now.....

If you are going to do job properly the do it properly, no bodges allowed.

Maybe your customers should check on the amount of expanding foam and grip fill that you use ;o))))))

 

[Midwest]

If you are going to do job properly the do it properly, no bodges allowed.

Maybe your customers should check on the amount of expanding foam and grip fill that you use ;o))))))

You've never go to bed at night, without brushing your teeth?