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07-28-2009, 02:26 PM
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#1
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Registered User
Trade:
Carpentry
Join Date: Aug 2008
Posts: 7
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What size steel beam to use for load bearing wall???
Hey, i need advice on choosing the correct size steel beam. Please excuse my lack of knownledge (Im a carpenter, not builder), i have the way i want to do this in my head, just not 110% on it because of lack of experience
Ok, I am knocking a wall between a kitchen to a living room. The wall is carrying the the 9x2 Joist overhead, The wall is made of 4 inch block. I want to knock the wall clean through, the opening is 3.5 metres (12 feet approx). I was told to leave a 6 inch bearing on the wall, is this correct.
Would appreciate also if you guys told me how you would approach this job. PS (A friend reckons a 8x4 steel steel beam would be ok.... but i am not so sure)
Thanks alot in advance
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07-28-2009, 02:31 PM
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#2
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Pro
Trade:
Framing
Join Date: Jan 2009
Location: Utica,NY
Posts: 517
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Your friend might be right, but....
Hire an engeneer to look at and size it properly!!
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07-28-2009, 02:40 PM
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#3
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Pro
Trade:
Builder/Remodeler
Join Date: Jul 2007
Location: Indianapolis, Indiana
Posts: 2,058
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Quote:
Originally Posted by brianmvp
Hey, i need advice on choosing the correct size steel beam. Please excuse my lack of knownledge (Im a carpenter, not builder), i have the way i want to do this in my head, just not 110% on it because of lack of experience
Ok, I am knocking a wall between a kitchen to a living room. The wall is carrying the the 9x2 Joist overhead, The wall is made of 4 inch block. I want to knock the wall clean through, the opening is 3.5 metres (12 feet approx). I was told to leave a 6 inch bearing on the wall, is this correct.
Would appreciate also if you guys told me how you would approach this job. PS (A friend reckons a 8x4 steel steel beam would be ok.... but i am not so sure)
Thanks alot in advance
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No one can, or should, tell you how to address a structural issue sight unseen... What someone "reckons" can often get you into serious trouble. You've not even given enough info for an educated guess.
A good lumber yard will have someone who can tell you the specs for a given type of beam... lvl... glue lam... etc. But only a structural engineer can tell you exactly what to use for your actual existing conditions.
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07-28-2009, 02:57 PM
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#4
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Registered User
Trade:
Carpentry
Join Date: Aug 2008
Posts: 7
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Sorry the joist are 9x2 approx 10ft long in each room. so it would be carrying say 22 joist or so.
the floor above carrying 120 sq ft of 12mm softwood flooring,
the same amount of solid oak flooring on top of this.
A 10 ft stud wall made of 3x2 and 9mm plasterboard
2 beds and 1 wardrobe.
If some1 could give me a formula,
I would give it a bash myself, (Its my own house so not to worried about being libel)
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07-28-2009, 03:12 PM
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#5
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Pro
Trade:
LI,NY designer, new homes, renovation work, concre
Join Date: Mar 2008
Location: Long Island, NY
Posts: 4,153
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__________________
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07-28-2009, 03:16 PM
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#6
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demo master
Trade:
Remodeling General Contractor
Join Date: Aug 2006
Location: Denver Colorado
Posts: 1,459
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Here in Denver when I pull a structural permit and there is no engineers letter they tell you to come back when he signed off on it. No guessing on beams and load points etc...
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07-28-2009, 03:19 PM
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#7
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LRG WoodCrafting
Trade:
Professional Sawdust Producer
Join Date: May 2005
Location: USA, Connecticut
Posts: 3,886
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A big'un
__________________
Measure Twice Cut Once -- It's a lot easier to cut more off then it is to cut MORON.
Quote:
Originally Posted by HusqyPro
Carpenter by day.
Mad scientist by night.
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http://lrgwood.com
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07-28-2009, 03:23 PM
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#8
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Pro
Trade:
Builder/Remodeler
Join Date: Jul 2007
Location: Indianapolis, Indiana
Posts: 2,058
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Quote:
Originally Posted by brianmvp
Sorry the joist are 9x2 approx 10ft long in each room. so it would be carrying say 22 joist or so.
the floor above carrying 120 sq ft of 12mm softwood flooring,
the same amount of solid oak flooring on top of this.
A 10 ft stud wall made of 3x2 and 9mm plasterboard
2 beds and 1 wardrobe.
If some1 could give me a formula,
I would give it a bash myself, (Its my own house so not to worried about being libel)
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You are clearly not a carpenter and don't have the chops for what you're proposing. You need PROFESSIONAL help, ON SITE... and not a "best guess" or "reckoning". You're going to hurt someone with your "bashing"--either your own family, or more likely whomever you sell this spec to...
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07-28-2009, 03:29 PM
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#9
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Pro
Trade:
Home Remodeling
Join Date: Dec 2007
Posts: 1,365
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Quote:
Originally Posted by brianmvp
Sorry the joist are 9x2 approx 10ft long in each room. so it would be carrying say 22 joist or so.
the floor above carrying 120 sq ft of 12mm softwood flooring,
the same amount of solid oak flooring on top of this.
A 10 ft stud wall made of 3x2 and 9mm plasterboard
2 beds and 1 wardrobe.
If some1 could give me a formula,
I would give it a bash myself, (Its my own house so not to worried about being libel)
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OP=HO??.. Now, let's da fun begins... OOps.. I meant... Da Bloody Monster Bash!!
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07-28-2009, 03:30 PM
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#10
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demo master
Trade:
Remodeling General Contractor
Join Date: Aug 2006
Location: Denver Colorado
Posts: 1,459
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Quote:
Originally Posted by brianmvp
(Its my own house so not to worried about being libel)
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The next guy might care if it falls down or is undersized.
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07-28-2009, 03:38 PM
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#11
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Registered User
Trade:
Carpentry
Join Date: Aug 2008
Posts: 7
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Quote:
Originally Posted by ChrWright
You are clearly not a carpenter and don't have the chops for what you're proposing. You need PROFESSIONAL help, ON SITE... and not a "best guess" or "reckoning". You're going to hurt someone with your "bashing"--either your own family, or more likely whomever you sell this spec to...
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Here buddy, I AM a carpenter, I know exactly what im doing, and how im going to do it!
I was just saying, dat I id give the formula a "bash" (attempt) if i got it. I want to make sure the floor above are structurally sound, if i can avoid paying an engineer to do a caluculation dat would only take 2 minutes.
So dont be coming on here patronising me pal, im just looking for some helpful advice
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07-28-2009, 03:46 PM
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#12
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Pro
Trade:
Framing,Remodeling,General Contractor
Join Date: Mar 2009
Location: Kansas City
Posts: 613
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I don't think an 8x4 is big enough. I would go with at least an 8x18#
13' long that would be 234 lbs
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07-28-2009, 08:12 PM
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#13
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Pro
Trade:
Framing,Remodeling,General Contractor
Join Date: Mar 2009
Location: Kansas City
Posts: 613
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Are you guys ignoring me?
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07-28-2009, 08:23 PM
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#14
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Al Smith
Trade:
Home Improvement contractor since 1983, In building field since 1974, Licensed
Join Date: Oct 2007
Location: South River NJ
Posts: 2,145
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there are no magic formulas. there are potential errors of omission.
Quote:
Originally Posted by brianmvp
Sorry the joist are 9x2 approx 10ft long in each room. so it would be carrying say 22 joist or so.
the floor above carrying 120 sq ft of 12mm softwood flooring,
the same amount of solid oak flooring on top of this.
A 10 ft stud wall made of 3x2 and 9mm plasterboard
2 beds and 1 wardrobe.
If some1 could give me a formula,
I would give it a bash myself, (Its my own house so not to worried about being libel)
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Brian Brian Brian 
If you don't already know the pounds per lineal foot of beam including point loads that you are trying to carry, then you need an engineer. My ex father in law who was a retired staff engineer for the port authority of NY used to size my steel for me. why are you afraid to consult one? they don't bite. It could be a learning experience for you.
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07-28-2009, 08:52 PM
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#15
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Plausible Deniability
Trade:
General Contractor
Join Date: Aug 2007
Location: Lakewood CA.
Posts: 2,224
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I would just be safe and go with a three giggawatt beam.Better to be safe than sorry.
__________________
"The problem with socialism is that eventually you run out of other people's money."
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07-29-2009, 04:51 AM
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#16
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Framer
Trade:
framing/remodeling
Join Date: Feb 2005
Location: NE Ohio
Posts: 996
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Quote:
Originally Posted by brianmvp
Here buddy, I AM a carpenter, I know exactly what im doing, and how im going to do it!
I was just saying, dat I id give the formula a "bash" (attempt) if i got it. I want to make sure the floor above are structurally sound, if i can avoid paying an engineer to do a caluculation dat would only take 2 minutes.
So dont be coming on here patronising me pal, im just looking for some helpful advice
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Da formula might not be the only thing getting a "bash"
Carpenter here also. Do the math yourself to be sure or call an engineer. Why would you trust the math skills of people on the internet who will hold no liability?
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07-29-2009, 05:56 AM
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#17
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Pro
Trade:
General Contractor
Join Date: Mar 2006
Location: Hennessey, Oklahoma
Posts: 4,570
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Enough. Closed.
__________________
Ladwig Construction Hennessey, Oklahoma 405 853 1563 Ladwig Insulation & Construction Services Serving Oklahoma Statewide 405 314 5802
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