[Shop-talk] 2 by's for truck ramp

[john niolon]

so Jim.... your calculations are based on the board being 20% wider ??? 
that makes sense but where do you find 'bearing weight'   (I don't know the 
proper term)  for how much weight either board would handle before disaster 
time...  I wonder if it truly is 20% more on the 2x12 ?

john
----- Original Message ----- 
From: "Jim Franklin" <jamesf at groupwbench.org>
To: "shop-talk" <shop-talk at autox.team.net>
Sent: Tuesday, August 26, 2008 9:14 AM
Subject: Re: [Shop-talk] 2 by's for truck ramp


> 20% more?
>
> For actual numbers, you can exptrapolate from joist span tables and
> the live load they can support, except the data is only relevant to
> the "on edge" orientation.
>
> jim
>
> On Aug 26, 2008, at 10:00 AM, john niolon wrote:
>
>> I wonder where the specifications for tensile strength are ???
>> looked around
>> on the internet ...found lots of specs on 'manufactured wood"  but
>> nothing
>> on a common pine 2x10...
>>
>> I'm sure grade enters into the formula and percent of water and
>> greeness..
>> (hey !!  I'm politically correct...I'm talking greenness)   but I
>> wonder how
>> much stronger (resistance to breaking across the wide face when
>> loaded) a
>> 2x10 is compared to a 2x12...  ???
>>
>> anyone hazard a guess
>>
>> john
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