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Welcome to BOSTD’s Bi-Design app – a comprehensive web application designed to assist our clients in crafting an appropriate approach to various engineering solutions. Bi-Design is available at no charge and provides a resource where you can create a personal account – evaluate and save project parameters and save your work for future reference. If you have questions with regard to Bi-Design results please contact us directly for technical support. It’s simple to use – create an account by clicking on the register button and gain access to this fantastic resource. Come back to add project or access saved projects whenever you have a design support need! Bi-Design includes the following tools:

QUICK CALC   Allows for quick geogrid/aggregate thickness selections based on field-proven, prescriptive methods for reducing costs and time associated with access/temporary road construction, subgrade improvement under pavements and other non-surfaced roads and working platforms. This CALCULATOR is designed for use where a quick solution is required for poor subgrade conditions. Input data required is minimal and easily gathered by field personnel.
     
SUB SAVE   For use where a more rigorous analytical approach and comparison of various geogrid reinforced and non-reinforced scenarios are needed to reduce the potential for subgrade overstressing. This CALCULATOR uses the design method for geogrid-reinforced unpaved roads developed by Dr. J.P. Giroud and Dr. Jie Han and published in the August 2004 volume of the ASCE Geotechnical and Geoenvironmental Journal. This methodology has been widely used since its publication and been adopted by the Federal Highway Administration in its course “Overview of FHWA Geosynthetic Design and Construction Guidelines (FHWA NHI-07-092).
     
BASE RF   Allows for analysis of geogrid reinforced flexible pavements and suggests the optimum reinforcement geogrid/base course combination to: reduce initial construction costs or increase pavement life span. Allows for analysis of geogrid reinforced flexible pavements and suggests the optimum reinforcement geogrid/base course combination to: reduce initial construction costs or increase pavement life span. The software applies conservative geogrid-specific-layer coefficient ratios (LCRs) developed using based on application of decades of successful biaxial geogrid performance, US based full scale trafficking trials and field performance data to the AASHTO ’93 flexible pavement design guide methodology.
     
ESTIMATOR   Results from the SUB SAVE and BASE RF CALCULATORs feed into this tool to facilitate quick cost estimates as well as cost comparison amongst geogrid/aggregate combinations being considered.
     
SPEC PLUS   Includes comprehensive hand calculation examples, simple “drop in” engineering specifications, detail drawings and installation guides. All information required by engineers and contractors to support the proper use of geogrid reinforcement technology is available here.