1. Knoxville Commercial Building Specialties

Building Specialty Options

Hollow Metal Frames (HMF)

We are a stocking Steelcraft distributor. Steelcraft is a leading name in the hollow metal industry. We can provide any type frame with any required jamb depth, from a standard 5 ¾" three-sided frame to a frame with sidelights and a jamb depth up to 14 ¾".If you have very special requirements, we can work with custom shops to meet any of your needs. To obtain detailed information about Steelcraft frames and profiles, please see below.

F-Series Frame
DW-Series Frame

Hollow Metal Doors (HMD)

We can provide you with an unlimited variety of doors to meet any design requirement. Doors can be flush (no windows) or we can supply windows of any size in the door. Steelcraft can provide a variety of cores to meet your building requirements: Kraft Honeycomb (L), Steel-Stiffened (B), Polystyrene, and Polyurethane. We can also provide stile and rail doors for full glass or full louver applications. We have doors available from 12 gauge to 20 gauge, six panels, or even stainable steel with a grain pattern.


  • Kraft Honeycomb (L) Standard Applications Steel-Stiffened (B) Industrial Application Stile and Rail (A, S)
  • Full Light or Louver Polystyrene Insulated Polyurethane Heavy Insulated
  • Door Skin
  • 12 gauge – 20 gauge
  • GrainTech
  • 6-Panel (CE)
  • Galvannealed
  • Stainless Steel

Steelcraft Product Test Information

Acoustical Doors

We offer acoustic doors to meet any specification. We supply acoustical doors from Ceco, Ambico, Overly, and more. Doors can be provided with a Sound Transmission Class (STC) from 33 to 53 and can be flush or with windows.

Specialty Doors

We are able to provide doors for most construction or end-user needs. We can supply bullet resistant, blast resistant, hurricane resistant, lead-lined, stainless steel, brass-clad, and vault doors to meet almost any specification. We also have fiberglass reinforced plastic (FRP) doors and frames for highly corrosive areas. We can supply these and many more, so please give us a call if you need a door that is not listed here.

Our Experience

William S. Trimble Co., Inc. is a full-service supplier of building specialties, in business since 1936.

We are divided into three divisions:

Wm. S. Trimble Company, Inc.

William S. Trimble Co. is a supplier of commercial doors (wood and metal), frames, hardware, windows, toilet partitions, toilet accessories, and many other specialty items.

Our expertise is unmatched in the industry. We have a DAHC (Distinguished Architectural Hardware Consultant) and 4 AHC’s (Architectural Hardware Consultants*) on staff to provide technical expertise and meet all of your consulting needs.

*Architectural Hardware Consultant is a certification issued by the Door and Hardware Institute (DHI), a governing body of the industry, upon successful completion of a detailed, tested course.

Trimble Residential Products

Trimble Residential Products is a distributor of residential doors, windows, hardware, and skylights. We distribute Kolbe windows and doors, Emtek hardware, and Velux skylights. All of these products can be seen in our modern 5,000 sq. ft. showroom. Our Kolbe design center hours are 9:00am–5:00pm M–F and by appointment on Saturday. Our professional sales staff is ready to assist you with all of your building needs.

Overhead Door Company of Knoxville™

Overhead Door Company of Knoxville™ is a supplier and installer of commercial and residential overhead garage doors, commercial rolling steel doors, security grills, dock equipment, and other traffic-related opening products.