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Architects, Contractors, and Engineers

The Schweiss Promise

Schweiss Doors partners with building suppliers, contractors, architects, and more to ensure that you receive a door that perfectly fits your building or open space. The Schweiss Doors team is available to assist you with all things regarding your door. Making sure that your door fits and operates properly is our top priority. Browse our listings of door weights, loadings, hinge locations, and other overhead door specifications (specs) to see what we have available.

It is important that you talk with your contractor and the building manufacturer to make sure that your building’s structural design can handle a bifold door. A bifold door exerts a large amount of weight on the door header, endwall, and overall structure of the building. Show your contractor and building owner the overhead door specifications to ensure that your building can handle it. Bifold doors tend to pull away from the building at the hinge line when they are in a full open position. Horizontal loads can exert considerable pressure on the building structure when the door is in the open position, which can wear on the door hinge and the building. In order for the door to be properly supported, the building header design must meet the standard criteria for both deflection and strength, both vertically and horizontally. This is the only way to ensure that the bifold door can be supported in all positions.

View Our Overhead Door Spec Sheets

Schweiss Bifold Doors provides our A-1, A-2, A-3, and A-4 spec sheets so that you can see the loads that would be applied to your building and door. These spec sheets include the information that you will need to make accurate measurements so you can rest assured knowing that your building can handle the load of a bifold door. Call (507) 426-8273 if you need any assistance or have any additional questions about bifold doors.

Thank You, Schweiss Doors

Architects, Contractors, and Engineers

Schweiss Handbook information

Bifold Door Measurements

Bifold Door Measurements

Steel Building - Placement of Bifold door on Building

Written Specs


1.1 Doors for this project will consist of (___) bifold doors

2. SIZE OF DOOR – Clear Open Width & Height

2.1 Hanger door with door in up position, shall have a minimum clear opening width of (___’___”) as shown in the plans and a minimum clear height of (___’___”) above finished floor elevation.

3. PLACEMENT of the Bifold Door onto the building – Choose One

3.1 Door shall be mounted on the exterior walls of building.

3.2 Door shall be mounted flush with exterior walls of building.


4.1 The bifold hangar doors shall be designed to the same loading requirements for live, dead and wind loads as the hangar building.

4.2 The doors shall be engineered to resist all anticipated loads without sagging, bowing or conflicting with its smooth and efficient operation.

4.3 Design for wind load as required by UBC, 1996 BOCA building code. (Example) Wind load (___) mph. Exposure (___)

4.4 The design shall be furnished, approved and sealed by a professional engineer registered in the state where the project is located

4.5 The building header shall be designed to accommodate horizontal and vertical building deflections to support the bifold door in all positions (with the proper lateral bracing).

4.6 The building’s door columns shall be framed of the proper design and size to reinforce the opening (with lateral bracing) and to carry all loads and vibrations imposed thereon.

4.7 The bifold door should have solid footing with sill directly underneath the doorframe and extending outward from the door to provide a base for the door’s weather seal. This also prevents flow of water into, or under, the door installation.

4.8 The finished floor of the building should be designed to prevent flow of water under the door installation. Sills shall have a slight slope outward of the bifold door to prevent water flow under the door installation

Call for custom Specs

The Best Bifold Doors have our name on them



We do not underestimate the importance of quality material when building our doors. We use heavy square tubing for the door frames to create a sturdy base for the rest of the door. The center and the bottom of the door are built using a truss that gives the structure of your door extra strength. Our door design incorporates metal strategically to a make our doors stronger, cleaner, and most importantly, safer. We are so certain in the strength and quality of our doors that we offer the best warranty in the business. Browse our four different models of bifold doors and find an affordable bifold door for your building today!

Schweiss Bifold Doors reserves the right to change specifications without any requirement to change or modify past or existing doors. Copyrighted © 2008 Schweiss Bifold Doors. All rights reserved. No part of this publication may be reproduced in any way without permission.arch-con-eng-13