SPECIFY
01. HDPE conduit guideline The National Electrical Manufacturers Association (NEMA) published its new Guideline for the Selection and Installation of Smooth-wall Coilable High- Density Polyethylene (HDPE) Conduit, NEMA TCB 4-2016. Developed and written with the participation of the Plastics Pipe Institute, Inc. (PPI), it provides recommendations for selection, handling, and installation of underground HDPE conduit or raceway for power, lighting, signaling, and communications applications. HDPE conduit, including cable in conduit, is widely used in trenching, horizontal directional drilling, and plowing installations. NEMA TCB 4-2016 is available as a hard copy or as an electronic download at www.techstreet.com/standards/nema-tcb-4-2016?product_id=1949105.
02. Sprayable strengthening system Simpson Strong-Tie said its new fabric-reinforced cementitious matrix (FRCM) can effectively repair, protect, and strengthen concrete and masonry structures for a fraction of the installed cost of traditional shotcrete repairs that use rebar. The FRCM externally bonded Composite Strengthening System combines high- performance sprayable mortar with a carbon-fiber grid that creates a thin structural layer without significantly increasing the structure’s weight or volume. FRCM can add flexural, axial, or shear strength to a range of structures. It is ideal for application on overhead or vertical surfaces in structures such as tunnels, mines, parking garages, silos, bridges, and other buildings with large surface areas.
Simpson Strong-Tie www.strongtie.com
Plastics Pipe Institute www.plasticpipe.org
03. Bike infrastructure design guide
04. Rugged pocket penetrometers
05. Bridge repair products
Stronghold Coating Systems released a brochure that details its bridge repair technology, including MM 1018 load-bearing polymeric resid for steel bridge construction and repair; RepaCoat capillary action coating for repair of bridges and other infrastructure such as pipelines; and Kable N-Cor, which protects bridge cables and connector mechanisms from corrosion. The company’sVenturi spray system, which applies RepaCoat and other two-part products with zero-waste is also detailed. According to Stronghold, the products are ideal for application on new bridges as well as for repair of those in service. MM1018 has also been used on dams, oil rigs, power plants, and other critical applications with high loading.
ELE International offers two new rugged versions of its pocket penetrometers for field-testing concrete and soils. They are made from ground and polished stainless steel with a special wear-resistant coating to prevent rust. The new penetrometers also feature a calibrated spring, a new low-wear indicator ring to avoid scratching, and a carrying case. The soil pocket penetrometer evaluates consistency and approximate unconfined compressive strength of soils. It was developed for use by field personnel to check the visual classification of soils for construction purposes. The pocket penetrometer's scale was originally developed (by ELE Soiltest) after compilation of several thousand unconfined compressive strength tests of various soil types.
The National Association of City Transportation Officials (NACTO) released guidance to help cities decide what types of bike infrastructure will best achieve their goals to build bike networks that are safe and comfortable for riders of all ages and abilities. The new guidance, Designing for All Ages and Abilities, builds on the organization’s Urban Bikeway Design Guide. By focusing on two key safety factors — vehicle speeds and traffic volume — in addition to design factors such as street width, Designing for All Ages and Abilities gives cities tools to assess any street and decide which treatments will improve safety and support increases in bicycling.
National Association of City Transportation Officials https://nacto.org
ELE International Ltd. www.ele.com
Stronghold Coating Systems www.strongholdone.com
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february 2018
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