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spud143
building a beem ?

hey i am building a beem out of 2+10 what is the best way to laminate the beems together I was going to glue it and nail it let me know if I should be doing anything else or something different?

Thanks ..

Blue RidgeParkway
Re: building a beem ?

see your other thread and answer the questions asked of you.

http://advice.thisoldhouse.com/showthread.php?t=10107

canuk
Re: building a beem ?

Putting together a mulitply beam is simple enough..... assuming all the plys are the same length.
What I like to do is use construction adhesive and Ardox ( as they're referred to up here ) spiral shank 3 inch nails.
Using a VVVVV pattern with the top spacing at 16 inch as well as the bottom spacing between each spike.
Then alternate the nailing pattern by inverting the V with each ply.
Or ....
using vertical rows of 3 spikes which each vertical row sapced 12 - 16 inches apart.

ed21
Re: building a beem ?

If you're making a beam with 5- 2x10's, you'd be better off buying an LVL beam from a lumber yard.

canuk
Re: building a beem ?
jkirk wrote:

dont forget about checking the crowns, make sure both pieces have the crowns orientated the same way when laminating and try to keep the top edge flush, when you install the beam have the crown up . also mark the crown with an arrow pointing to the crown so you dont have to double check it

Geez ......... this is an important point ....... good catch jkirk.

Some things are naturally done without giving a second thought ..... this being one of those assumptions.:o

I heard those words ringing in my head each and every day.
If it wasn't my grandfather it was my dad . One of those things being passed down from generation to generation.;)

Blue RidgeParkway
Re: building a beem ?

I suspect you are trying to engineer your own girder, 14' long out of 2x10" sawn lumber, although I cannot imagine your accomplishing any type of engineered standard with five self laminated 2x10"s for a 14' span.

If you are looking to engineer your own beam or girder you should have a clue about your loads and what methods are correct and acceptable to do so. Will assume nothing about grade, species, etc. of your 2x10s which you twice refer to as 2+10 whatever that is supposed to mean. (two foot 10s as in doors?).

You have provided no details on either your original post nor this one regarding the load forces or the application of your project.

A structural engineer or architect, licensed and certified to stamp plans is your most responsible resource choice an on-site visit likely necessary since you are unwilling or unable to provide details on structural application and load forces. You claimed you consulted some sort of chart. linear foot beam or girder loads requiring the equivelent of 5 laminated 2x10"s would be reduced significantly using a built up girder depending on species, grade, etc. and you've said nothing about location (snow loads), etc. The weight of the self-builtup beam or girder, and limited to less than your planned span - and you did not indicate the length of the joists you are looking to support (limited in length for your unsupported span as well). Suspect you should be looking at an engineered beam or steel and reducing your span to 10' or less but you have said nothing about the joist lengths either.

http://www.umass.edu/bmatwt/publications/articles/sizing_engineered_beams_headers.html

canuk
Re: building a beem ?

I would have to agree with Blue as to not knowing what you are trying to accomplish.

While this thread is discussing how to fabricate a mulityply beam in general .... it doesn't say that this is indeed the correct size of beam or materials for the application.

There is no way on an open forum anyone can determine the appropriate structural member such as this without knowing the particular loads , etc..

Blue RidgeParkway
Re: building a beem ?

I was "taught" that if you needed to build-up more than 3 planks you should be increasing the depth not adding width; or considering alternate materials. Of course all the building inspectors I've encountered where-ever we've lived won't pass anything past 3 without a certified stamp backing it up and filed.

By the way if you're fabricating a built-up header beam for a wall, usually you sandwich in a layer of ply so the end resulting header beam fits your wall framing, plates, studs, etc.

libcarp
Re: building a beem ?

A small piece of steel can replace a very large wood beam.

I'll always remember the reaction of my brother in law when he saw our basement and there wasn't a column in sight! I then show him above the ceiling and the heavy weight steel beams that span 60'!

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