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rast
Mar 31st 2012, 05:13 PM
Typical W style truss, 2X4, 24' span using 2 12's @ the bottom. Bottom of the W is 8'. I am going to use it to lift 300 to 500 lbs. If I bolt another 2X4X8' across the bottom using 24" centers for the bolts (1/4" bolts should suffice, and not drilled in a parallel line), a piece of plywood cut to fit the top 4 of the W to tie them together better. Then 2 vertical 2X4's appx 24" apart on center of the truss. Outer ends of the truss would then be the weak link, I think.
Advise welcome!
http://i399.photobucket.com/albums/pp79/RAST01/truss.jpg

Crofter
Mar 31st 2012, 05:40 PM
Rast, I have almost the identical trusses but 28' span. I was looking for chainfall anchor to pull an engine. The approach I took was to spread the load across 3 or 4 of the trusses by sliding up 3 pieces of 2x10 scaffold planks and hanging chainfall from that. The weak link, as you have stated with beefing up a single truss, is the stress riser at the ends of the stiff spot you create. There is strength in numbers.

What old poacher does that spear belong to?

PerryBee
Mar 31st 2012, 05:58 PM
I saw that too Crofter :lol: It looks too big for a smelt spear.

jmblakeney
Mar 31st 2012, 06:19 PM
It just looks like frog gigging spear to me?!?!?!

rast
Mar 31st 2012, 08:03 PM
Naw, the frog gig has fish hooks and a fiberglass pole. That one is to just help get a gator over the side of an airboat.

frog gig

http://i399.photobucket.com/albums/pp79/RAST01/froggig.jpg

tecumseh
Apr 14th 2012, 05:49 AM
I don't have my load table handy like I use to but 24' sounds like a long span for any kind of load with 2x4s.