I moved my anemometer to the chimney last week. This week I raised the bottom strap along with the mast one foot. This leaves 2 ft between the straps and 8 ft above the chimney. This puts anemometer just over 6 ft above roof line. Mast is 1 1/4" EMT from Home Depot
for pics prior to change)
Several web sights stated... "If the mast must be 10 feet above the chimney top, donít use a chimney mount unless you can space the straps at least 30 inches apart. For masts less than 10 feet above the chimney top, the straps should be spaced no less than 24 inches apart."http://www.dennysantennaservice.com/1170999.html
So with my mast 8 ft above chimney, I fall into the guidelines with 2 ft spacing. If I could find solid pole a little longer, I would replace mast so I could increase distance between straps.
Anyway, just wanting to get others thoughts on instillation. We get some high straight line winds here every year (up to 60 MPH).