Issue link: https://read.dmtmag.com/i/314292
48 • JUNE 2014 • WORLD FENCE NEWS characteristic that sets it apart from other non-structural sound barriers when dealing with very low frequen- cies such as vehicular or even train noise. In frequencies of 50 Hz and below, the heavy limp Acoustifence material actually begins to vibrate from low frequency sound waves, Johnson explained. In essence it is transforming these Special sound barrier tames noise levels at Atlanta Motorsports Park low frequency sound waves into me- chanical movement and internal fric- tion energy. Laboratory tests indicate that this transformation process reduces these low frequencies from penetrating the Acoustifence by over 60 percent rela- tive to the human ear. In these low fre- quencies test results show an NRC (noise reduction coefficient) as high as 0.78 (1.00 being the max). The word "green" refers to envi- ronmentally-preferable attributes of a product, service, and/or technology. The 1/8 thick Acoustifence is a unique proprietary formula. It does not contain barium, asbestos, or lead and is UV-resistant and impervious to water and mold. Graffiti, a real con- sideration in outdoor areas, is easily removed compared to other surfaces, he noted. Acoustifence material is ex- tremely strong and was engineered to withstand harsh outdoor environments like roadways, highways and con- struction sites where full exposure to dirt, grease, oil, mold, or even being driven over can occur. For more information on Acous- tifence and other Acoustiblok prod- ucts, visit www.acoustiblok.com. Long-time readers of World Fence News will remember Herb Borner, a fence man's fence man if there ever was one. Herb had done it all, and was happy to share his expereiences in a regular column for many years. Here is just one sample of his down-to-earth practical advice, and is one of the first articles he submitted to WFN, back in July 1983. Sadly, Herb passed away several years ago. It is a known fact that the best of materials poorly installed can create an eyesore. A fine ship in a harbor, with the best anchor but a weak anchor chain, is soon adrift. Similarly, fence posts set in weak or inadequate con- crete footings soon leads to a leaning fence. Footing widths and depths vary in specifications due to differences in opinion of architects or whomever is designing the fence. ASTM standard F567 defines a good practice to be fol- lowed. This standard, generated from Committee F14 on Fences, calls for concrete footings to be four times the diameter or widest cross section of the post. A footing for a 4 high fence is to be a minimum of 24 deep with 3 added to the depth for each additional foot in height. Holes drilled in rock are to be three times the post diameter or widest cross section in depth with ½ clear- ance between post and side walls of the drilled hole. The better footing is one where the holes are power auger drilled. The best footings, especially in cold weather areas, are those that are (a) precast; (b) concrete poured into wooden forms, backfilled and tamped; and (c) stovepipe sleeves backfilled and tamped. This will allow frost to rise with- out gaining a hold on the smooth sides of the footing. A post hole dug with a hand digger is best when the post hole is bell bottomed or "balled" at the base. The bell shape allows the frost to lift away from the footing, and the ball, if below the frost line, will pres- ent a greater mass for the frost to lift. Posts should be concreted in place as soon as possible after being dug. Holes left open overnight will gener- ally fill in. If you set your posts in "caved in" holes after redigging, you do your customer and yourself a dis- service. This can give access to attack by frost. An off-centered preponderance of weight will cause the footing to set- tle in that direction. Too big holes, too small holes, off- center holes, large redug holes and driven posts with concrete caps added to the top generally are bad practices. Hand mixing accounts for the small holes (less work), transit mix for the large holes (plenty of concrete) and slothfulness for the capped posts. We didn't always have transit mix, and when it did become available, we couldn't always afford it. The time saved by using a transit affords time for checking hole align- ment and driving in spot posts. This time spent saves bucks as the mix truck is in and out of the site without charging for overtime. If the installer lacks experience, he should stick to hand mixing, then go on to the cement mixer before at- tempting transit mix. BY HERB BORNER, WFN CONTRIBUTING EDITOR IN MEMORIAM US Patent No: 8,266,771 B2 Our PATENTED KDT Power Twist Tie saves time, and time is money! 9 ga & 6 ga conform to ASTM F626-96A Sizes for 1-5/8 pipe up to 8-5/8 Available in Galv. Class B Coating or less & Aluminized "Affixing the fence fabric to a fence post is an important and repetitive step in most fence installations. For this reason, an inexpensive fence tie that facilitates high quality fastening with reduced time and effort can improve upon the time and cost associated with building fences." – As published in U.S. Patent, KDT Power Twist Tie Look for it at your local supplier or Call 800-749-7181 E-mail: sales@kdwire.brcoxmail.com AND MENTION WFN! Keener Dupont Wire Co., LLC Where wire is our only business Only four steps needed to install the KDTwist Saves 20% on installation time! – Move KDTwist to post at a 45° angle; it pops on. – The installer does not have to pry apart legs. Reduces fatigue for the installer. – Smaller opening to close. – Use any power twist tie tool on the market to secure the KDTwist. Special sizes or shapes on request • KDT now available for T-posts Available in 12 ga, 11 ga, 9 ga, 7 ga, 6 ga Power Twist Tie KDT PIGTAIL AND SQUARE KDT AVAILABLE! MEMBER MEMBER Ending back breaking post pounding! Skidril is the place for fence post pounders and equipment. With over 30 years of experience and thousands of customers all over the world look no further for the best in the business. We make Gasoline, Hydraulic and Pneumatic powered drivers. The Skidril hydraulic driver line can be powered by the smallest power supply in the industry (only 97 lb. and 2 sq. ft.) or even your tractor, skid loader or digger. From ground rods to 4" pipe or wood we have a solution for you. SKIDRIL.COM • 800-843-3745 American Ingenuity. Back in the 90's we had an idea! We invented the self-contained post driver. The first machine (which is still running) was delivered to a fencer in New York State. Now the Ultra-Driver G20D Gas Powered Post Driver offers awesome performance in an affordable package. Make no mistake only the Skidril G20D comes from a company with nearly 30 years experience making gas driven tools for the fence industry. The Ultra-Driver G20D is the most powerful driver in its class powered by a 4 stroke Honda motor or 2 stroke. A great product at a good price from a name you can trust! © Skidril Inc. 2013