4 ½” Interior Storefront System


4 ½” Interior Storefront System

Perfect for Secured Vestibule
Glazing Infill 1/8" to 3/8"
Reinforced Immediate Door Frame

The E4500 series storefront system provides customers with the same quality standards found in our door products. This center glazed system is recommended for low rise applications and is commonly used with secured vestibules.

This storefront system utilizes Cross Aluminums’ heavy duty doorstop allowing parallel arm closers to be mounted with no worries of it pulling out of the frame header. Furthermore, this frame will only use closed backed tubes at every door opening, enhancing the structural strength and longevity of the whole entrance system. All immediate door frames have an internal wall to provide rigidity as they are anchored to the building, allowing the entrance to stay uniform and plumb.

E-4500 Cross Aluminum Storefront

Secure anchor

Cross Aluminum will only supply closed-back extrusions at every door opening.  This allows for the frame to be securely anchored to the building without product deformation.  Industry standard open backs could deform and not allow snap-in door stop to engage or the door to sag when using side lites.

Cross Aluminum E-4500 Heavy Duty Door Stop Comparison

Heavy Duty door stop

Our heavy duty door stop was introduced as a means to deal with a couple common problems after doors are installed. The taller height allows for a better seal around the door opening perimeter. Furthermore, the thicker wall provides the strength required for closer parallel arm brackets and rim strikes to be mounted worry-free for years after installation.


Face Width
1 3/4" to 2"
Max Frame Height
Wall Thickness
Frame Depth
4 1/2" and 6 1/2"
Immediate Door Frame
Closed Back Tube
Base Dimensions
1 3/4" to 10"
Door Frame Assembly
Spline and Shear Block
Side Lite Frame Assembly
Thermal Break
Polymide 66
Glass Plane
Glass Capture
Glass Infill Range
1/8" to 3/8"
Exterior Glazing
Interior Glazing


Air Infiltration
6.24 psf
Water Penetration
12 psf
Uniform Load Structural
45 psf
Sound Transmission Class
STC 28

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World Class Quality. Full range of finishes and colors.

Anodizing aluminum is an electrochemical process that oxidizes the material. This provides a protective layer around the aluminum. Anodizing allows the finished products to be corrosion resistant and maintenance-free for years. Cross Aluminum only utilizes the Acid Etch Anodize process in order to improve product finish quality and color consistency. Furthermore, acid etching can reduce up to 90% of the aluminum sludge and waste used in typical caustic etch anodizing processes.


Simplicity at its finest. Secure Glaze Technology.

Cross Aluminum has always distinctively designed glazing to enhance the structural strength of the door. Every glazed entrance at Cross Aluminum will come with a secure non-removeable exterior glass stop.  Glazing kits are unacceptable and compromise the strength and security of any entrance, that is why our glazing is incorporated as part of the structure of the door. Furthermore, all glazing parts will match the finish of the door, unless specified otherwise.