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

To: john niolon <jniolon@bham.rr.com>
Subject: Re: [Shop-talk] 2 by's for truck ramp
From: Donald H Locker <dhlocker@comcast.net>
Date: Tue, 26 Aug 2008 20:14:26 -0400
20%  almost exactly.  Accurately, it'll be 11.625/9.625 or 21.1% (not counting 
variation in the lumber.) On the other hand, a 2x4 on edge under a 2x10 will 
_add_ (1.625/9.625)*(3.625^2)/(1.625^2)) or 1.5x the strength of the 2x10 
alone. 
  So put a 2x4 under your 2x10 and make it 2.5x as strong.  Or two of 'em and 
go 
up to 4x the strength (1 + (1.5x * 2)).

Donald.

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
> ----- Original Message ----- 
> From: "David Scheidt" <dmscheidt@gmail.com>
> To: "Skip Albright" <salbrigh@nycap.rr.com>
> Cc: <shop-talk@autox.team.net>
> Sent: Tuesday, August 26, 2008 8:44 AM
> Subject: Re: [Shop-talk] 2 by's for truck ramp
> 
> 
>> On Mon, Aug 25, 2008 at 8:38 PM, Skip Albright <salbrigh@nycap.rr.com> 
>> wrote:
>>> Seems like an easy choice, but maybe not.
>>>
>>> I need to have a couple 2 by's for a ramp to my pickup.
>>>
>>> No particular load, but could be pretty heavy .
>>>
>>>   last week it was a model A frame and axles.
>>>
>>> 2 x 10? 2 x 12?  are wider boards stronger?
>> Wider boards are stronger, if you turned them sideways.  It's the
>> depth of the beam that determines its load capacity.
>>
>> -- 
>> David Scheidt
>> dmscheidt@gmail.com
>> _______________________________
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