Fhwa Boxcar Software
Software The FHWA software available at this site is in the public domain and is available for downloading as zipped files or self-extracting zipped files. This software may be downloaded and used without restriction. By downloading the software, the user accepts responsibility for understanding the following conditions and limitations, and agrees to them: • The FHWA does not provide user assistance or support for this software. • The application of this software is the responsibility of the user. It is imperative that the responsible engineer understands the potential accuracy limitations of the program results, independently cross checks those results with other methods, and examines the reasonableness of the results with engineering knowledge and experience.
• There are no expressed or implied warranties. Links to software produced by others (HEC-RAS, WMS, and SMS) are also provided below.
Note: Engineering software is currently unavailable for download using Internet Explorer. Please use Chrome or Firefox instead. We are working to resolve the issue as quickly as possible. The following table lists free TxDOT and FHWA engineering software to assist in highway design. It provides an overview and minimum.
McPherson Concrete Products, Inc. Box 369 116 North Augustus McPherson, KS 67460 Phone: 620-241-4362 Fax: 620-241-5254 Concrete Pipe Resources We have compiled some useful reference material for you from the American Concrete Pipe Associations 'Concrete Pipe Insights'. Just click on the links to learn more about the benefits of concrete pipe. Durability: Too Important to Ignore One of the most critical but overlooked factors in project design is material durability, or service life. Even such fundamental considerations as a material's ability to perform intended structural and hydraulic functions become irrelevant if a pipe cannot perform satisfactorily for an economically acceptable period.
Laboratory and field data have firmly established that concrete pipe is the recognized leader in service life among buried pipe products. Studies and historical data prove a product life of 100 years or more for concrete pipe. Despite some manufacturers claims, the fact is that no known material is completely inert to chemical action or immune to physical deterioration. Therefore, it is necessary to identify that material which offers the greatest likelihood of long service life. Contrary to the implications in polyethylene pipe (PE) promotions, concrete pipe has an excellent service life record.
Sulfuric acid attack from effluents may occur in some sanitary sewers, but not in storm sewers. Exterior acid attack has never represented a problem for concrete pipe. There are design options which can extend the life of concrete pipe in aggressive conditions. Polyethylene pipe's service life, however, is time dependent, and the product experiences creep and stress relaxation (deflection). Although PE is an inert material when not under stress (load), it is susceptible to attack from some chemicals while under stress. Examples of these chemicals are strong oxidizing acids, oils, alcohols, and polar reagents such as detergents.
Because of polyethylene pipe's thin walls, slight scratches or wear from handling and abrasion can be critical. Concrete pipe, on the other hand, has greater wall thickness than polyethylene pipe and is very strong and dense, so scratches, gouges and abrasion are not a factor in the life of concrete pipe.
Polyethylene pipe is flammable, susceptible to ultraviolet degradation, and is temperature sensitive. None of these conditions affect concrete pipe. The inherent strength of concrete pipe increases with an increase in pipe diameter for the same strength classification. Conversely, pipe stiffness often decreases as pipe diameter increases with most polyethylene products. Hydraulics: Check the Comparisons Marketing materials published by the smooth-lined polyethylene (SLPE) pipe industry suggest that SLPE has better hydraulic flow characteristics than concrete pipe. Automatic Cable Manager 12 Activator Raritan.