Links

This page lists accepted governmental agencies, industry organizations and educational institutions that are relevant to the geosynthetics industry.

To have your organization considered for inclusion on this page, please email the web content developer.

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  • American Association of State Highway and Transportation Officials

    The AASHTO represents the transportation and highway departments and promotes the operation, maintenance and development of the integrated national transportation system.
    www.transportation.org

  • American Public Works Association

    THE APWA represents public works professionals and provides a forum in which members can share ideas to improve performance and make the public aware of important industry-related topics.
    www.apwa.net

  • American Road & Transportation Builders Association

    The ARTBA represents professionals who design, build and maintain the national Interstate Highway System.
    www.artba.org

  • American Society of Civil Engineers

    The ASCE, an organization that represents more than 146,000 civil engineers, strives to improve civil engineering and advance professional development and knowledge in the field.
    www.asce.org

  • American Society of Highway Engineers

    The ASHE promotes education and innovation in the highway industry to create a safe and efficient highway system.
    www.highwayengineers.org

  • Associated Builders and Contractors

    ABC represents merit shop construction and construction-related firms with the goal of promoting, expanding and improving the U.S. construction industry.
    www.abc.org

  • Associated General Contractors

    AGC is a trade association that supports integrity, responsibility and quality in the American construction industry.
    www.agc.org

  • ASTM International

    ASTM develops technical standards for products, materials, services and systems to guide design, trade and manufacturing worldwide.
    www.astm.org

  • Canadian Geotechnical Society

    The CGS, which is affiliated with the Canadian Federation of Earth Sciences and the Engineering Institute of Canada, provides members with opportunities for professional development.
    www.cgs.ca

  • Deep Foundations Institute

    The DFI represents a network of professionals in the deep foundations sector of the construction industry and supports quality, economical foundation construction and design.
    www.dfi.org

  • Drainage and filter components for green roofs

    Sponsored by IFAI Expo

    The Purpose of Drainage for Green Roofs

    • Manage rainfall without sustaining damage from erosion/ponding of water
    • Provides void space and slope to transport subsurface water
    • Connects to roof drains, gutters, and scuppers and conducts water away from roof
    • Removes surface water from impervious surfaces
    • Maintains optimum growing conditions in the planting media

    The Purpose of Filter for Green Roofs

    • To prevent fine planting media particles from washing into the drainage layer
    • Prevents the reduction or clogging of drainage capacity
    • Usually a nonwoven geotextile, occasionally a woven fabric, is used

    Filter Components
    For retention:

    • The geotextile must have small enough openings to adequately retain the planting media
    • If not, soil particles will eventually clog the drain core

    For permeability:

    • The geotextile must have large enough openings to allow unimpeded flow of water
    • If not, hydrostatic pressure will build up and the planting media will not drain

    What are Geocomposite Drains?

    • A manufactured material that combines geotextiles and a polymeric core
    • The core composition varies in design and material
    • Geotextiles may be applied to one or both sides using heat bonding or adhesives
    • Geotextiles can filter, protect or hold water
    • Geotextiles are available in sheets or rolls that are overlapped or joined during construction

    Source: “How to Design Green Roofs & Landscapes” presented at the 2009 IFAI Expo, Sept. 22, 2009, in San Diego, hosted by the Geosynthetic Materials Association (GMA)