Kwality Konstukshun

**ozwinner** · 19th October 2005, 07:15 PM

Hi all
I saw this the other day on site.
The upstairs floor joists are made of 6mm masonite with top and bottom cord made of laminated 70x30mm pine. :eek:

I just had to take a piccy to share with yous lot.

Al

**Driver** · 19th October 2005, 07:33 PM

****!!

That looks actively dangerous. The top and bottom chords on the RH joist in the photo are already splitting.

Is it legal?

**ozwinner** · 19th October 2005, 07:43 PM

Must be, the builder I am working for, beleive it or not ARE quality builders.
It just shocked me to see masonite used in this way.

Al

**DavidG** · 19th October 2005, 08:04 PM

Shouldn't there be a double top plate? :confused:

**Auld Bassoon** · 19th October 2005, 08:05 PM

Strewth!

I've seen some dodgy jobs before, but that one's right up (down?) there...

Has the owner seen this "clustermuck"?

Cheers!

**bitingmidge** · 19th October 2005, 08:10 PM

Tell me it's a trick photo!

Or get me the web address of the company that do the joists!! My understanding of hardboard (masonite) is that it may just sag a bit when it gets damp, when it sags it may just cause the flange to fail??

Teejay?? or any other engineer????

Help!

P
:eek: :confused: :eek:

**ozwinner** · 19th October 2005, 08:19 PM

Originally Posted by DavidG

Shouldn't there be a double top plate? :confused:

There are only double top plate on the outer walls.
Strewth Im a brickie and even I know that.

Al

**ozwinner** · 19th October 2005, 08:22 PM

Originally Posted by bitingmidge

Tell me it's a trick photo!

Or get me the web address of the company that do the joists!! My understanding of hardboard (masonite) is that it may just sag a bit when it gets damp, when it sags it may just cause the flange to fail??

Teejay?? or any other engineer????

Help!

P
:eek: :confused: :eek:

Sorry Midge.
The piccy I took, is what I took, no trickery.
I too think that with moisture, even if the web is water proofed, must sag/bend over time.

Al :eek:

**ozwinner** · 19th October 2005, 08:28 PM

Here is another one.

Al

**sol381** · 19th October 2005, 09:05 PM

They are very similar the the hyne beam which uses plywood instead if masonite. It is much stronger than you think. They can span further than regular joists. are much lighter and can be drilled thru in case plumbing or electrical cables are needed. I have never used those masonite types but all floor trusses are engineer designed. The strength lies in the glue and the way the thickness of the material used, not in the pine plates. Most times its just mgp10.
Try and bend a piece of masonite along its narrow end. Virtually impossible. You`d be amazed what is being used in construction.
That splitting is probable caused by the nails that are driven in to secure it to the top-plate.
stef

**RETIRED** · 19th October 2005, 09:05 PM

http://www.hudsontimber.com.au/ibeams/default.asp

http://www.tilling.com.au/smartframe...ods.htm#Ijoist

**ozwinner** · 19th October 2005, 09:10 PM

Thats it Smart Frame.

I tryed to search it on Google, but got nothing.

Al

**E. maculata** · 19th October 2005, 09:15 PM

Crikey, I've heard about them, now there they are, look worse than they sounded..............hmm wonder how they react to deflection or torsional pressure, moving clay soils all that sorta stuff.

**ozwinner** · 19th October 2005, 09:17 PM

If using this crap can save one more tree for me, Im all for them.

Al

**echnidna** · 19th October 2005, 09:18 PM

They are engineer designed.
So was
The Titanic
& The Space Shuttle

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