Parts List for Zip Line installation with Wood Posts

I researched options for posts for the zip line in the net. At first I thought I would use pressure treated wood and put them in concrete. It seems that the wood will rot and the concrete may crack. Most people suggested placing the posts in the ground filling the hole with crushed stone. This allows the wood to stay dry and not rot. Since the posts are not subjected to high bending forces in my design, I thought this would work well. The other bonus is that it is easier to remove the posts if they are not cemented in the ground.

Parts List:

Zip Line Kit From Amazon. This one is made for kids but can hold up to 225 pounds. It comes with the trolley, cable, and most of the hardware that I needed. Cost $98.99 as of 7/18/2013.
Spring Swings Deluxe Fun Ride (Colors May Vary)

In the reviews for the Zip Line, people suggested attaching a disk seat swing to the trolley. This is a great Idea. The kids really like sitting on the disk seat while playing on the zip line. I bought the Little Tikes Disc Swing which is on Amazon for $19.99 as of 7/18/2013.

4x6" x 12' Pressure Treated Timber. Cost about $25.00 each from Home Depot.

Koch 3202093 2 Cable Block Fixed Flange, Zinc Plated Pulleys from Amazon. I bought 2 at first but needed an additional one to handle the high force on the starting side. Cost $6.99 each as of 7/18/2013.

Heavy Duty Chain - Campbell 0722327 System 3 Grade 30 Low Carbon Steel Proof Coil Chain on Reel, Zinc Plated, 3/8" Trade, 0.37" Diameter, 35' Length, 2650 lbs Load Capacity I used two 3 foot sections of this chain which I encased in concrete and rebar to form the ground anchors. Home Depot sells the chain by the foot for about $2 per foot.

Light Chain I used two 10' sections, Home Depot will cut to length for about $1.50 per foot.
Koch A01211 1/4 by 20-Feet Grade 30 Proof Coil Chain , Zinc Plated

Concrete - I used 4 bags of Sakrete 80lb Concrete Mix - $4 per bag at Home Depot 

Bonsal American Se (Wrb) 80Lbsakrete Concretemix 10280 Concrete Mix. You will need a container to mix the concrete and a measuring cup to measure the right amount of water as well as a shovel to mix it.

I used a post hole digger to dig the holes in the ground - It is difficult to go any deeper than 4' by hand.
Seymour Promotional Post Hole Digger with Wood Handle DG-60

 

1 Cubic Yard of 3/4" crushed stone from local stone yard. $30 delivered.

Six 1/4" Stainless Steel or Zinc Coated Anchor Shackles - about $2-4 each from Home Depot

Forney 61161 Screw Pin Anchor Shackles, 1/4-Inch

1/2" Rebar for the cement anchor, I cut it up into 2-3 foot sections and used 2 pieces per anchor for a total of about 12'. Cost about $15-$20 total depending on where you buy it. I had some pieces lying around from a previous project.
Steelworks Boltmaster #4-1/2X72 Rebar 11804 Rebar W/Smooth Rods

Since the cable can break at the loop, I reinforced the loops with thimbles for added security. The kit had one so I bought one for the other end of the cable.Koch 143121 Wire Rope Clips and Thimble for 1/8-Inch Cable, Zinc Plated. Cost $4 on Amazon as of 7/18/2013.

It is very hard to get the proper initial tension by hand. The final tension is set with the turnbuckle which comes in the kit. I used a ratcheting cargo strap for this. Cost $19.10 for a set of 4 from Amazon as of 7/18/2013. 

TEKTON 6223 15-Foot by 1-Inch Premium Ratchet Tie Downs, 4-Piece