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#1 |
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Registered User
Trade: contractor
Join Date: Sep 2009
Posts: 18
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3 Ply 16" Lvl
My plan calls for three 1 3/4 x 16 " drop girder but due to height restraints in that area of basement I would like to set the girder the same height as my I-joist 11 7/8". The span is 18 ft and there is no side load only load from first floor wall and any roof braceing in that area for hips. So my question is can I use four 1 3/4"x11 7/8" lvl's in that area and be as strong as the three 16" LVL's shown on plan? Thanks for any help.
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#2 |
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Curmudgeon
Trade: carpentry/remodeling/"Yes M'am we do"
Join Date: Apr 2006
Location: Beech Grove, Indiana, Birthplace of the "King of Cool"
Posts: 11,707
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Re: 3 Ply 16" Lvl
http://www.ilevel.com/literature/TJ-9000.pdf
You could take your prints to your supplier. They will probably be able to advise you.
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Put your location in your profile! (Sorry....it seems there really are dumb questions) |
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#3 | |
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KemoSabe
Trade: residential framing/siding/general carpentry
Join Date: Feb 2009
Location: Vineland, New Jersey
Posts: 12,821
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Re: 3 Ply 16" LvlQuote:
Other options are a partial drop of the beam, keeping the top flush to the top of joists, or having an engineer spec a steel flitch to sandwich in between the plies of LVL. If your engineer allows a 7x11 7/8 beam, I would order it full width to avoid laminating it on site. You could also consider breaking the span down with a column. In any case, give an engineer the final say in what you do. |
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#4 |
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Pro
Trade: Engineer & Ret. GC
Join Date: May 2007
Location: 44deg15'43"N 74deg14'26"W
Posts: 830
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Re: 3 Ply 16" Lvl
My I-Level tables (think "Weyerhaeuser," laminated-veneer-lumber, a.k.a. LVL) show that the total load capability for a triple 16 at 18'6" span is 1066 psf (pounds per foot), and the total load capability for a double 11.875 is only 299 psf. You asked whether a quad 11.875 will handle your situation, and it will, provided that your total load is 299 x 2 or 598 psf or less.
That said, it is readily apparent that a quad 11.875 has less than HALF the load-carrying ability of a triple 16 at your 18-foot span. Why don't you get whoever figured your triple 16 to sign off on your proposed quad 11.875? I am an engineer, but I'm not your engineer. Last edited by UpNorth; 09-09-2009 at 01:33 PM. |
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| The Following User Says Thank You to UpNorth For This Useful Post: | KentWhitten (09-10-2009) |
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#5 |
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Registered User
Trade: contractor
Join Date: Sep 2009
Posts: 18
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Re: 3 Ply 16" Lvl
Do you think I could attach the built up 16" lvls to the side of and steel I beam with a top mount hanger on one end and have a bump out on my block wall for the other end? Say if I attach it to the steel beam I could weld a plate say a ft wide to bring the web out even with the top and bottom flange and will have 2x glued and screwed on top of top flange could i mount a hanger for the girder on the side of the steel i beam that way?
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#6 | |
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Money Changer
Trade: Residential Remodeling
Join Date: Jan 2008
Location: Bucks County, PA
Posts: 804
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Re: 3 Ply 16" LvlQuote:
This is the advice you should follow. |
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#7 |
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Fentoozler
Trade: Professional Pie and Pastry Taster
Join Date: May 2007
Location: New Jersey
Posts: 5,585
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Re: 3 Ply 16" Lvl
I think you should *send the plans and your "idea" back to engineer/archi/drafter for approval.......and get the necessary seal if required.
Lot of questions to be covered by your insurance..
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Last edited by Celtic; 09-09-2009 at 01:54 PM. Reason: *missed word |
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#8 |
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Registered User
Trade: contractor
Join Date: Sep 2009
Posts: 18
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Re: 3 Ply 16" Lvl
thanks for your input on this I believe I will take your advice.
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#9 |
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Curmudgeon
Trade: carpentry/remodeling/"Yes M'am we do"
Join Date: Apr 2006
Location: Beech Grove, Indiana, Birthplace of the "King of Cool"
Posts: 11,707
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Re: 3 Ply 16" Lvl
Maybe we could help more
if you posted an introduction. Fill in your profile and give us some info about yourself and what you do. Right now, you are starting to sound HO-ish.
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Put your location in your profile! (Sorry....it seems there really are dumb questions) |
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#10 | |
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Pro
Trade: Framing Contractor
Join Date: Jun 2004
Location: Caldwell, New Jersey
Posts: 1,541
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Re: 3 Ply 16" LvlQuote:
__________________
Joe Carola |
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#11 |
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Pro
Trade: framing/remodeling
Join Date: Feb 2005
Location: NE Ohio
Posts: 3,688
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Re: 3 Ply 16" Lvl
Wrong Joe.
I can answer it NO NO NO NO! |
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#12 | |
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New Guy
Trade: Framer
Join Date: Sep 2009
Posts: 16
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Re: 3 Ply 16" LvlQuote:
to address the original post. a quad 12" lvl sounds iffy for the span. a triple 12" lvl with (2) 5/8" steel plates sandwiched in between the plys would do the trick though. as for the connection detail to your i-beam, notch the girder into the beam, then weld a plate on either side of it, then thru-bolt into your new girder with (3) 3/4 bolts. if you're going into a w10 then i would add a seat plate as well. but the plates and thru-bolts are crucial since you're side-loading the steel. |
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#13 |
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Curmudgeon
Trade: carpentry/remodeling/"Yes M'am we do"
Join Date: Apr 2006
Location: Beech Grove, Indiana, Birthplace of the "King of Cool"
Posts: 11,707
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Re: 3 Ply 16" Lvl
More guts than sense.
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#14 | |
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The Duke
Trade: Cabinet Maker
Join Date: Mar 2006
Location: Portland, Maine
Posts: 10,086
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Re: 3 Ply 16" LvlQuote:
Another thing to think about is the MEP's. If you raise that beam and items have to go from one side to another, will you create a different mess for the client to deal with? If they are thinking a clean look of sheetrock on the ceiling and the plumber has to drop the waste line below the bottom of the joists, then you've created another issue.
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If you correct your mind, the rest of your life will fall into place ~Lao Tzu Custom Cabinetry - Portland, Cape Elizabeth, Scarborough, Kennebunkport, Yarmouth, Falmouth, Cumberland, Ogunquit, Maine Salmon Falls Cabinetry |
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#15 | |
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New Guy
Trade: Framer
Join Date: Sep 2009
Posts: 16
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Re: 3 Ply 16" LvlQuote:
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#16 |
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The Duke
Trade: Cabinet Maker
Join Date: Mar 2006
Location: Portland, Maine
Posts: 10,086
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Re: 3 Ply 16" Lvl
__________________
If you correct your mind, the rest of your life will fall into place ~Lao Tzu Custom Cabinetry - Portland, Cape Elizabeth, Scarborough, Kennebunkport, Yarmouth, Falmouth, Cumberland, Ogunquit, Maine Salmon Falls Cabinetry |
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| The Following User Says Thank You to KentWhitten For This Useful Post: | Celtic (09-10-2009) |
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#17 |
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New Guy
Trade: Framer
Join Date: Sep 2009
Posts: 16
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Re: 3 Ply 16" Lvl |
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#18 |
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Curmudgeon
Trade: carpentry/remodeling/"Yes M'am we do"
Join Date: Apr 2006
Location: Beech Grove, Indiana, Birthplace of the "King of Cool"
Posts: 11,707
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Re: 3 Ply 16" Lvl
You will notice that not many here
are willing to pass out engineering advice to people who don't seem to be very experienced, as we can't see their situation, and have no idea what important details might be left out and what they might misinterpret.
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Put your location in your profile! (Sorry....it seems there really are dumb questions) |
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| The Following User Says Thank You to neolitic For This Useful Post: | Celtic (09-10-2009) |
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#19 | |
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New Guy
Trade: Framer
Join Date: Sep 2009
Posts: 16
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Re: 3 Ply 16" LvlQuote:
plus i'm not trying to help the guy, i'm only contributing to a discussion about how things may get done. if we can't discuss engineering here, what are we to discuss? cellphones? |
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#20 | |
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The Duke
Trade: Cabinet Maker
Join Date: Mar 2006
Location: Portland, Maine
Posts: 10,086
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Re: 3 Ply 16" LvlQuote:
__________________
If you correct your mind, the rest of your life will fall into place ~Lao Tzu Custom Cabinetry - Portland, Cape Elizabeth, Scarborough, Kennebunkport, Yarmouth, Falmouth, Cumberland, Ogunquit, Maine Salmon Falls Cabinetry |
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