Thanks to all the Towertalkers, including K7LXC , N4KG, N6IN/2, K1MK, N8KU, W5FL, AD3F, AA1K, K8LX, W4EF, and W9RMA, who so generously shared their knowledge of this topic with me, off-list as well a
If you guyed a 70 foot 45G at 4 levels and put the top set at the top, it would hold a HUGE load. I can't calculate how much since I am not an engineer, but you should find one and suggest this confi
Doesn't this drawing for R45 also ASSUME an 8 sq ft side mount (for dish antennas)? IF that is the case, and you do NOT install the dish mount, you can add ~8 sq ft to the rated load for R45. And YES
I guyed an 80 ft TV tower at 4 levels and another 75 footer at 3 levels. I can't imagine guying 70 ft of R45 at 4 levels. Maybe 3 for a really strong installation, otherwise 2 levels should be adequa
Rohn specs aren't "super conservative" - they merely conform to standards such as the TIA-222. The published Rohn tower specs and configurations are for commercial applications where you may have ant
According to Rohn's spec sheets, either a 45G guyed tower or an SSV self-supporting tower can support an antenna having 8 sq.ft. of equivalent flat-plate area in 90-mph wind, at the top of a 70-ft. t
In 25 words or less? You can gather the steel costs yourself - check Texas Towers or other Rohn dealers. In general, the cost for the guyed system will be less - less excavation, less concrete, less
Don't forget that Rohn isn't the only manufacturer of self-supporting towers. They tend to be on the relatively expensive side whereas the Trylon Titan and AN Wireless versions are less expensive for
Why don't you call Texas Towers, get the prices for ALL of the material you would need and add it up YOURSELF? (Actually, I expect Texas Towers would even add it up for you). Then call a professional
That's exactly what I'll do if it's not going to waste those folks' time. All I asked for here was an _estimate_. I expected that among Towertalk subscribers there'd be folks who could give me estima
I'd already done that. The difference in steel cost is not significant. The _erection_ of a 70-ft. SSV tower is what worries me. I know that a guyed system is cheaper, but by how much? $3k, $30k, or
Depends. If you are willing to assemble it yourself (on the ground), and your lot permits access to a small crane, it might not be any more expensive. A crane would be in and out of there in an hour
I will probably get flamed for this, but I can't resist. Aren't those Rohn specs for 45G super conservative (8sq ft at 90 MPH) because they place the top set of guys so far below the top of the tower
Indeed, Rohn's documentation for the 45G and 90 mph (Dwg. no. C870478 R1) shows the upper guys for a 70-ft. tower attached at 61 ft. The antenna area spec's given in this dwg are 9.1 sq.ft. for an eq