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T.R. Arnold and Associates, Inc. is an employee-owned company providing services to the Manufactured Shelter/Housing Industry since 1967. Our services comprise of engineering approval, drafting, plant layout, DAPIA, IPIA, third party modular plan review and inspection services. We are an approved DAPIA and IPIA under the HUD Manufactured Housing Program. We provide third party plan review and inspections for all types of modular buildings.


TRA has been bringing total electronic coordination to our clients since 2000. We have a very simple, efficient, totally paperless system for plan review and approval. This helps reduce costs and improve project turn around time for our clients. We also offer other web based services beyond plan review and approval. For more information please visit our Web Services.


T.R. Arnold & Associates, Inc. Accredited by:

The International Accreditation Service (IAS) ISO 17020 #AA674 and; Certificate

The Standards Council of Canada (SCC) 17065 #10064 Certificate

Blue Prints
American Society for Testing and Materials International Accreditation Service Canadian Recreational Vehicle Association International Code Council Indiana Manufactured Housing Association-Recreation Vehicle Indiana Council Manufactured Housing Institute National Association of Home Builders National Fire Protection Association National Storm Shelter Association Recreation Vehicle Industry Association Standards Council of Canada