birdbath supports, holding up clotheslines, supports for above ground feed lines, fence posts, temporary supports(horizontal) for building antennas, paint stands, pipe racks (great for organizing sma
if the rivets are tight you can use a drill bit just a bit larger than the hole in the rivet. most pop rivets take about a 1/8" hole, i use a 3/16" or so bit and drill just until the head comes off,
before you go to all that trouble just take a couple decent size wrenches. if the bolts don't loosen easily just twist the heads off and forget them. much faster and less effort than trying to save t
got lots of them around here, they often nest in trees at the edge of the field the towers are in, about 100' away. they make a racket but leave me alone. now the circling vultures are another story.
I hate to blast this out to these lists, but today i have received several copies of the w32.sircam.worm from addresses i recognize from various ham mail lists. this one spreads very quickly. you can
of course the lifting rope load remains the same, but the force required on the pulling end decreases so the total load on the gin pole does get reduced. for example, with a standard gin pole lifting
start with this, a single pulley at B with a 300lb load at C and a 300lb person at A holding it off the ground. there is 300lb of tension in the rope to hold the load up, so at B there is 300lb pulli
i have not had a need to do it, but a 2:1 arrangement would also be easy to do. all you need to do is tie one end of the rope to the top of the pole, run through a single moving pulley where you atta
wrong... as i pointed out it is possible to get an advantage for both the puller and the pole by the use of a single top pulley and a single travelling pulley. that is the basic 2:1 system where you
its the same as if someone was holding it, you still have that downward force exerted to keep the load where it was. one basic misconception is that a force being applied doesn't mean that anything i
WRONG! the higher the mechanical advantage of the block and tackle the lower the load on what is holding it up(diregarding the weight of the tackle itself). i'm sorry if you just don't get it, i've e
in aluminum alloy designations the first number is the alloy composition number which can be looked up in a table to get the various percentages of elements in the alloy. the 'T' number is the heat t
has this changed recently or are there separate requirements based on the type of tower? training i had a year or so ago on osha requirements for work on power line towers still allowed for the belt
i would not pull up more than about 60' of rohn 25 no matter how many people you have. i would expect that at 90' with lights and wires you would fold over the legs of the bottom section or fold the
they are, but not always the same body of water on each side. look at barrier islands along the coast, or islands at the end of a river delta. long island ny is a good example, one side on the ocean
bury the wire not a good idea. maybe attach a tower to the house no, read the latest arrl letter about a ham being killed when the 2m ant they were putting up came in contact with the house wires. wi
with lightning season here and spring/summer (though i still have 1-2' of snow on the ground here!) contests getting under way here are a few links that may prove useful. please feel free to pass the
also, don't connect with screws. the best way is to drill through and use either bolts with large washers if you have good size structural members in the right spot(only works if you are very lucky)
several reasons: 1. jacking the antenna further up the mast than you can work standing on top of the tower is a real pain. 2. lowering an antenna jacked up on the mast to work on it and then putting
Several of you asked for a summary of what I got about heavy lifting rope. This started because I need a new rope for lifting stuff up my new 180' tower. I used to use a fine thread polypropylene twi