GENERAL

Engineering Fabric shall meet the applicable requirements given in the Standard Specifications.

Engineering Fabric Forms shall meet the requirements of the current DS titled “Fabric Formed Concrete Structure Revetment”.

Approved products are listed in MAPLE.

ACCEPTANCE FOR ENGINEERING FABRIC/ FABRIC FORM

For products with label or identification, acceptance of Engineering Fabric and Fabric Forms for use on Iowa Department of Transportation projects is based on manufacturer and brand name approval. Approved manufacturers and products are listed in the Materials Approved Products Listing Enterprise (MAPLE).

For products without label or identification, acceptance of Engineering Fabric and Fabric Forms for use on Iowa Department of Transportation projects is based on a statement of certification:

Certification Statement

This is to certify that (insert manufacturer name, product name) this Engineering Fabric or Fabric Form meets the requirements of the (insert applicable specifications article) of the Iowa Department of Transportation.


	Authorized Signature & Date

A responsible company representative shall sign the certification statement.

MANUFACTURER & BRAND NAME APPROVAL FOR ENGINEERING FABRIC/FABRIC FORM

To obtain approval, the manufacturer shall submit the following to the Construction and Materials Bureau:

1. Product Identification including current signed mill certificate and manufacturing facility location identification for the product submitted.

2. Technical information on the use of the product

3. Quality control procedures that indicate product uniformity is reasonably assured. Geosynthetic Accreditation Institute-Laboratory Accreditation Program (GAI-LAP) current certificate for the testing lab performing quality control testing on the product submitted (Preferred).

4. Approximately a 1 square yard sample may be required upon request

5. AASHTO Product Evaluation & Audit Solutions test results for all classes of Engineering Fabrics. If AASHTO Product Evaluation & Audit Solutions test data is not available for Triaxial Polymer Grid, then independent lab test data results may be submitted for review.

6. Products which have been tested by AASHTO Product Evaluation & Audit Solutions and meet the requirements of Iowa DOT Specification for the class of product may be approved after receiving AASHTO Product Evaluation & Audit Solutions test results.

7. In the case of silt fence, after receiving the AASHTO Product Evaluation & Audit Solutions test data for the fabric, the cord / band and the full silt fence assembly may be tested to see if it meets Iowa DOT specifications.

8. In the event that a firm is selling their products under private label agreement with another manufacturer, the private label firm shall submit an application identifying the original product designation and a letter of certification from the primary manufacturer verifying the information.

9. Approval of Engineering Fabric Forms will be based on satisfactory evaluation of a preliminary sample.

To maintain approval of products within MAPLE, Manufacturing facilities of all engineering fabric classes must submit their product and facilities into the appropriate AASHTO Product Evaluation & Audit Solutions Audit program and secure and maintain a successful audit thru the program for their facility in accordance with the appropriate workplan (GTX, REGEO, SSGEO) within AASHTO Product Evaluation & Audit Solutions. Private Labelers must also enter the appropriate Audit program for their products to remain approved. If a product does not fall into an existing AASHTO Product Evaluation & Audit Solutions workplan, independent laboratory testing and Quality Control procedures shall be submitted to the Construction and Materials Bureau yearly if the product has changed in any regard.

IMPORTANT NOTE: The AASHTO Product Evaluation & Audit Solutions Committee work plan for Geosynthetics for Subgrade Stabilization is now active. Manufacturers and private labelers need to submit their facilities and products into this Audit Program. Products, Manufacturers, Manufacturing Facilities and private labelers that are not included within the AASHTO Product Evaluation & Audit Solutions Audit Program by January 2025 will be removed from MAPLE. See AASHTO M 288 for products covered under this requirement.

MONITOR SAMPLING & TESTING

The Construction and Materials Bureau may request sampling and testing of Engineering Fabric and Fabric Form for the purpose of monitoring the approval program at any time.