8501 N.W. 90th St. Medley, Florida 33166 | Phone: 305-696-8660  

Standard Products
2000 La Porte French Door
4000 Designer Window
6000 Picture Window
7500 Single Hung Window
8500 Horizontal Rolling Window
9000 Sliding Glass Door
Impact Products
2200 La Porte HG French Door
3200 HG Casement Window
4200 HG Designer Window
6200 HG Picture Window
7700 HG Single Hung Window
8700 HG Horizontal Rolling Window
9200 HG Sliding Glass Door
9400 HG Sliding Door
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Contact Details


Lawson Industries, Inc.

Email request to Info@lawsonwindows.com

F: 786-924-7000

8501 N.W. 90th St.
Medley, Florida 33166

Lawson Windows' - Mullions
Confugurations 1 x 3, 1 x 4, 2 x 4, 2 x 6” rectangular tubes
Spans Up to 150”
Reinforcing Steel reinforcing available
Color White, Bronze


General Information
Used in openings that contain multiple type and/or size of fenestration product, which when joined must form a structural system that can withstand a required design pressure. To provide an easily read, reliable source of information for the engineer, architects, builder, etc. Lawson provides third party certification of its mullion’s when used with a variety of product, keyed to mull type, length, fastener type, and design pressure. Refer to Lawson mullion N.O.A. for details on our aluminum mullions that come with or without steel reinforcing; can be used in spans up to 150 inches; and can be used in all impact or non-impact installations.


Features & Benefits

Multiple Section Sizes Multiple mullion depths from 3 to 6” deep, available with or without steel reinforcing, allow the mullion to be truely sized for each unique opening.

Flange Frame Mullions Available Aluminum mull sizes range from 1”x2”, 1”x3”, 1”x4”, 2”x4” and 2”x6” tubes. (A non tubular “4” mull is available for non wind load exposed openings, but N.O.A. data is not available, nor can it be provided.)

Fin Frame Mullions Available Aluminum mull size is 1”x2” and 1”x3” tubes. (A non-tubular “4” mull is available for non wind load exposed openings however, no N.O.A. data is available, nor can it be provided.)

Custom sizes Mullions are cut in length as required to fit any opening.

Product Resources

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Product NOAs

NOA document   NOA document  


Product Sample Settings
sample project featuring Mullions
sample project featuring Mullions