[TheForge] Wooden Beam strength for Rigging

[terry l. ridder]

hello;

comments below;

On Sun, 29 Jan 2006, Woolley wrote:

> Greetings,
>
> I seem to remember a thread about beam strength a while back but don't
> have any info.  I'm not sure if this is the right forum but here goes.
> I want to hang small steel I beams(6"?) under my roof joists to rig
> from. I'm hoping to get up to 1/2 ton or so capacity.  The beams
> measure 3x11 1/2 with no room above (obviously butt up to roof deck),
> so I have to drill to bolt through or lag in to hang straps down and
> under to support steel.  The joists are spaced 2 feet apart. I hope
> to span at least 5 or 6 of them. Does anyone have a known reference
> for engineering specs on this or any practical experience doing
> something similiar?  Any help would be appreciated.
>

you really do not want to do that.
a 2 ft span between rafters is not enough support.
also you run the risk of weakening the rafters and flexing the roof
decking and causing the roof to leak.

>
> Regards,
> Bill Woolley
>

-- 
terry l. ridder ><>