| awningpro.com | National Register of Professional Awning Cleaners |
| construction-institute.org | Construction Industry Institute |
| abc.org | Associated Builders and Contractors (ABC) |
| pavementpro.com | National Pavement Contractors Association |
| nssa.cc | National Storm Shelter Association |
| nspi.org | National Spa & Pool Institute |
| necanet.org | NECA - National Electrical Contractors Association |
| nahb.org | National Association of Home Builders (NAHB) |
| mpta.org | Mechanical Power Transmission Association |
| mbma.com | Metal Building Manufacturers Association |
United States , North Carolina , Wilson