RAW
Welcome back.
Why not just attach to the purlins? They would be my choice.
IMO, avoid attaching to those walls.
RAW
Welcome back.
Why not just attach to the purlins? They would be my choice.
IMO, avoid attaching to those walls.
agree 100%Originally Posted by gargoyle
I wouldn't use a wedge anchor if there's a 2" poly void in there. Look into epoxy systems that are used for both hollow and solid concrete... Hilti makes one called HY-70.
(I work for Hilti.)
"We're the Sultans of Swing."
Here's my set up I have personally tested this to a little over 600 pounds(3 people) and am using 3/16" diameter tapcon screws into the concrete block. And these tiedown rings can be bought at tractor suply for about. $3.50 each and are rated to 5000 pounds and the tapcons are rated at 1750 pounds each as long as they are in the concrete at least 1.25 inches and over 2 inches apart And these brackets holes are spaced right at 3 inches my other side is attached to double 2X6 studs next to my closet with 3.5 inch deck screws also I thee in a picture of ho tight the weave of a Mayan hammock is that's my thumb at the top of the pic for a size refrence. Also the washers that I used are nickles that I drilled holes in ( who says coins are useless LOL)
Last edited by busan321; 01-15-2013 at 18:28.
+1 on the purlins, must agree with gargoyle and surreal trip.
With a 17 foot span you might appreciate that height as well.
I'm glad it is working for you, but this rating is incorrect. According to the following Tapcon chart...Tapcon table.jpg , a 3/16" Tapcon in CMU (concrete masonry unit) under ideal conditions has a pull out value of 540 lbs.
A pull out value of 1730 lbs. is achieved with 1-3/4" embedment in 5000 psi poured concrete which is a stronger mix design then normally used in housing construction.
Gargoyle,
Why are you against anchoring to the walls?
My concern about the purlins was that the bottom lip would twist/bend.
No matter the scenario, I will have to fabricate custom brackets because we have drywall over thin metal studs in front of the concrete and a similar system installed just under the purlins.
Wedge anchors are going to make big holes, I would second what Keg said and use Tapcons with Hex heads on a plate or 2x4 mounted on the wall. They have exact specs for drill size to make the holes but you aren't going to pull them out and you can't break them without a 5 foot crowbar. The holes will be much easier to patch someday.
"To turn from this increasingly artificial and strangely alien world is to escape from unreality. To return to the timeless world of the mountains, the sea, the forest and the stars is to return to sanity and truth." --Robert Burnham Jr.
I stand corrected. I went back and looked at the package that the tapcons came in and they are the 1/4 " thickness not the 3/16" and I don't know what Psi concrete was used to fill the blockwall when my great grandfather built the house in 1952 but the walls were poured solid after the block was put up and the walls were framed with 2x6 instead of the regular 2x4 so I'm guessing that also has something to do with the strength of my hammock setup either way I have had 3 people n the hammock and we didn't end up on the ground
Last edited by busan321; 01-16-2013 at 05:21.
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