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High-speed machine tool spindles and the high-pressure turbopumps that move liquid hydrogen in the space shuttle are just two examples of the uses for hybrid roller bearings. ASTM Subcommittee F34.01 on Rolling Element has now developed a standard for hybrid roller bearings, ASTM F2730/F2730M , Specification for Silicon Nitride Cylindrical Bearing Rollers. Subcommittee F34.01 is under the…
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Responding to an increasing level of interest from engineers, regulators and communities, ASTM International Committee C27 on Precast Concrete Products has formed new Subcommittee C27.70 on Precast Concrete Products for Stormwater Management. “New environmental regulations, as well as vastly improved methods of meeting these, have created many new products and practices for stormwater management…
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A new ASTM International subcommittee, D07.08 on Forests, is now soliciting all interested stakeholders to assist in the development of a proposed new guide for forest management systems. The purpose of the subcommittee, under the jurisdiction of ASTM International Committee D07 on Wood, is to promote knowledge, stimulate research and develop standards pertaining specifically to forests. Industry…
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Although alkali resistant glass fibers have been commercially available for more than 30 years, there has not been an official standard that clearly defines what is required to make glass fibers resistant to alkali attack without the need for protective coatings. ASTM International Committee C27 on Precast Concrete Products has recently developed such a standard, C 1666/C 1666M , Specification…
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A new ASTM International standard that covers annular ball bearings intended primarily for use in instrument and precision rotating components has been developed as a conversion of a U.S. military standard, MIL-B-81793F, Annular Ball Bearings, for Instruments and Precision Rotating Components. The new standard, F 2332 , Specification for Annular Ball Bearings for Instruments and Precision…
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A recently approved ASTM International standard recognizes new state of the art technology for reinforcing glued laminated timber beams. The standard, D 7199 , Practice for Establishing Characteristic Values for Reinforced Glued Laminated Timber (Glulam) Beams Using Mechanics-Based Models, was developed by Subcommittee D07.02 on Lumber and Engineered Wood Products, under the jurisdiction of ASTM…
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Ineffective removal of grease from restaurants poses a variety of serious environmental problems. Large quantities of grease in public sanitary sewer systems can cause stoppages of piping networks and create costly and time-consuming problems at treatment plants. Sewer backups resulting from grease can also create health hazards when raw sewage backs up into homes or businesses. While grease…
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ASTM International Committee D07 on Wood is seeking participation in the development of a proposed new specification that establishes engineering design values for wood and natural fiber-polymer composites. As the performance of these composites improves, more sophisticated engineering applications will become available to this class of materials. Engineering design values will enhance their…
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ASTM International Committee F34 on Rolling Element Bearings is seeking participation in a new activity on measuring the cleanliness and wetability of bearing components. Because aerospace customers currently use many different methods of testing ball bearings, the goal of the activity is to work toward a consistent method for measuring cleanliness and wetability, as well as to analyze the…
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", Performance of Structural Wood Adhesives: Issues Related to the ASTM Standards on Engineered Wood Products" is the subject of a workshop being sponsored by ASTM International Committee D07 on Wood. The workshop will be held from 1:30-4:30 p.m. on Oct. 18, as part of the ASTM October Committee Week in Dallas, Texas. For those interested, a joint meeting of Subcommittee D07.02 on Lumber and…