For small self-supporting towers, two borings may suffice. Waterproofing Cracks in Double Bolted Joints depth. will need Ask your supplier if you'd like to know the exact weight. Please refer to the "ROHN 25G Tower" Link appearing in the Footer of this Page Below! 3/8", & 3. again. As construction elements are usually measured in feet, our calculator converts the volume into cubic yards - in our example, 4 cu yd (108 cubic feet). Its density depends on several variables: the content of the cement, the amount of water added, the amount (and density) of the aggregate used, and the amount of entrained air. By the end of the 19th century, America had built its first concrete bridge (the Alvord Lake Bridge in San Francisco, California) and its first concrete street (in Bellefontaine, Ohio, and it is still around today). Sometimes you hear people use the terms concrete and cement interchangeably, but that's not correct. ), The calculator will indicate the number of 60 or 80 Subscribe now to get updates on products, var year = currentTime.getFullYear() Once clear, rotate the tower and lay it down on the ground; then disassemble into the 10' sections. Professional Installation Required*, 1-1/4" OD, 16 Gauge legs 5/16" OD Solid Bracing Completely hot-dipped galvanized after fabrication. Im putting 1 ST2 and 2 800 mhz yagis. This 12 x 12 footing needs to be calculated 12 x 16 so the footing is figured to go above grade to reach the 4 slab thickness. number of 10.1 oz. Angle of internal friction All Information regarding the ROHN 25G Tower line, Parts and Accessories is as accurate and complete as we can possibly provide given that this Resource Offering is subject to change without Notice and is beyond Our Control. Heres what the math looks like for a 10 by 10 concrete patio: Essentially you are solving for volume and then converting to cubic yards. Mainly, because if it is a hollow tube tower "which im sure it is" the legs may start to rust VERY quickly where the legs become incased in cement, sometimes from the inside of the legs working torward the outside. Concrete is produced in a variety of compositions, finishes and performance characteristics to meet a wide range of needs. Hot Dip Galvanized Odd shapes:Transform odd shapes into rectangles and odd shapes are suddenly easy to figure.