I'm going to be installing a 20' heavy steel mast in my tower (a Trylon 72' self-supporting tower). I will be renting a crane to lift the mast and drop it from above. What kind of rigging do I use on
proper knots like pipe hitches won't slip off. or you could put a clamp on the pipe where you want it to stop going into the tower and use that as an anchor for the rope or sling. that has the advant
There are a few different ways Probably the way your crane operator will feel the most comfortable is a loop sling setup in a "choker" configuration http://www.wisc-online.com/objects/MTL2702/chk1.gi
I have always used a clove hitch with an extra turn ( http://www.realknots.com/knots/hitches.htm#mwvsl ) which I tie just above center of gravity on the mast to prevent tipping on the way up. Never
We haul stuff up towers everyday with the Marline Hitch or Single Hitch as it's called. A Little tape at the bottom so it doesn't slip in the beginning and your off to the races. 73 Dave n4zkf e-mail
The simple solution: Drill a hold through the upper end of the mast and insert a long 'screw eye'. Hook the crane cable to the 'screw eye' and haul it up. Most cable operators will know how to releas
200 pounds is no load at all for a crane. I install a muffler clamp on the mast just to ensure that it does not slip off the end. If you tie near the top you'll have to climb the mast to disconnect.
Technique I have used successfully is the clamp just above the center of gravity keep it bottom heavy going up, and with a basketball hoop (without the net), feed the mast up through the hoop which i
Is the tower up? If not, insert the mast B4 raising the tower ... you can then easily lift the mast by inserting a pulley in the bottom of it, running a tied-off line to the top of the tower, thru a