Series B450 Thermally Broken Aluminum Storefront System

Boyd's Series B450 is a thermally broken commercial aluminum storefront framing system designed for a wide range of commercial storefront applications and project specifications. The ASTM-rated system has a 2" × 4.5" profile, accommodates glazing up to 1" thick, and provides dependable air, water, structural, and thermal performance for commercial buildings.

Series B450 is available with Boyd's proprietary extrusions, inside- or outside-glazed details, screw-spline or shear-block assembly, accompanying vents, commercial entrance coordination, and the storefront accessories needed to complete the selected opening.

A Boyd storefront representative can help identify the appropriate Series B450 configuration, prepare the order, and coordinate rush jobs with attentive service and quick shipping. By maintaining a full inventory of Series B450 storefront framing and accessories, Boyd can carefully package and ship orders anywhere in the United States while cutting normal delivery times in half. To discuss project details or place an order, call 800.737.2800.

Series B450 Storefront Product Details

Series B450 dimensions, glazing capacity, thermal designation, and published ASTM performance:

Series B450 Product Data and Downloads

Use the current Boyd resource links below for B450 detail drawings, screw-spline and shear-block specifications, storefront performance charts, installation instructions, related storefront systems, entrances, accessories, and finishes.

When to Use the Series B450 Storefront System

• Commercial storefront openings that require thermally broken aluminum framing rather than a non-thermal storefront system.

• Low-rise, ground-level, single-story glazed openings requiring a 2" face, 4.5" frame depth, and glazing up to 1" thick.

• Retail, office, education, healthcare, institutional, government, renovation, replacement, and other commercial storefront applications.

• Projects requiring center-set storefront framing with inside- or outside-glazed details and screw-spline or shear-block assembly options.

• Storefront elevations requiring coordination with commercial aluminum entrance doors, sidelites, transoms, thresholds, hardware, finishes, accompanying vents, and system accessories.

• Projects using the published CRF 64 and U-value 0.38 as the starting thermal-performance values for the Series B450 configuration.

• Rush-order storefront and accessory work where Boyd's inventory, attentive service, careful packaging, nationwide shipping, and shortened delivery times can help support the installation schedule.

Choosing a Boyd Commercial Storefront System

You are viewing the B450 thermally broken center-set storefront system with a 2" × 4.5" profile and glazing up to 1" thick. Storefront selection should begin with the required thermal tier, face dimension, frame depth, glass plane, glazing thickness, entrance needs, ventilation, finish, water-management details, wind load, and opening conditions. Review the related systems below when the project requires a non-thermal option, a narrower face, XT dual-thermal construction, a front-set glass plane, historic-replica framing, or zero-sightline ventilation.

Series B450 Storefront System Advantages

• Thermally broken commercial aluminum storefront framing for projects that require a thermal barrier.

• Engineered to meet varied storefront applications and individual building specifications.

• A 2" × 4.5" storefront profile accommodates glazing up to 1" thick.

• Published ASTM performance includes 0.02 CFM/FT. air infiltration at 6.24 psf, 10.00 psf water resistance, and 37.50 psf structural performance.

• Published CRF 64 and U-value 0.38 provide clear thermal-performance references for Series B450 selection.

• Center-set storefront framing is available with inside- and outside-glazed details.

• Screw-spline and shear-block assembly options support varied fabrication and installation plans.

• Storefront performance charts support mullion, opening-size, wind-pressure, dead-load, and reinforcement review.

• Available with accompanying vents, commercial entrance coordination, proprietary extrusions, and the accessories needed for the selected storefront configuration.

• Anodized, painted, and project-specific finish options can be coordinated across storefront framing, entrances, exposed accessories, and adjacent materials.

• Boyd representatives support storefront selection, layouts, drawings, specifications, entrances, vents, accessories, order preparation, packaging, and installation planning.

• A full inventory of Series B450 storefront and accessories supports rush jobs, careful packaging, nationwide shipping, and shorter normal delivery times.

Common Series B450 Storefront Coordination Items

• Thermal strategy: Confirm the required storefront thermal tier, glazing makeup, entrance condition, energy-code criteria, condensation requirements, CRF, U-value, perimeter conditions, and adjacent-wall construction before final selection.

• Storefront versus curtain wall: Storefront framing is typically used at low-rise, ground-level, single-story openings. When an elevation spans multiple stories, crosses floor lines, or requires curtain-wall anchorage and movement accommodation, review a curtain-wall system instead.

• Glazing: Confirm the complete glass makeup, 1-inch maximum thickness, safety glazing, coatings, tint, heat treatment, spacers, edge conditions, setting blocks, gaskets, glazing stops, glass availability, and glazing responsibility.

• Inside- or outside-glazed details: Confirm the required glazing direction before finalizing storefront details, glass installation access, perimeter conditions, field sequencing, and replacement-glazing plans.

• Fabrication and shop drawings: Select screw-spline or shear-block assembly and coordinate the required extrusions, fasteners, shear blocks, drill requirements, cut lists, shop drawings, frame assembly, opening identification, and field installation sequence.

• Air, water, and structural performance: Coordinate 0.02 CFM/FT. air infiltration at 6.24 psf, 10.00 psf water resistance, and 37.50 psf structural performance with opening dimensions, mullion spacing, reinforcement, glazing, anchorage, and installation conditions.

• Mullions and spans: Coordinate opening width and height, vertical- and horizontal-mullion spacing, wind pressure, glass weight, dead load, reinforcement, expansion conditions, anchors, and intermediate horizontals. Performance charts are design aids, and final limitations should be reviewed by the project engineer.

• Water management: Coordinate subsill, end dams, sill flashing, weep paths, glazing pockets, perimeter sealants, backer materials, thresholds, adjacent construction, and field drainage conditions.

• Entrance integration: Coordinate the door series, entrance frames, single doors or pairs, sidelites, transoms, thresholds, panic hardware, closers, access control, clear openings, accessibility, glazing, thermal requirements, and finish before release.

• Ventilation: Confirm the selected vent, B450 compatibility, glazing, thermal strategy, sightlines, screen requirements, operating hardware, interior and exterior clearance, drainage, flashing, and installation details.

• Anchoring and perimeter conditions: Verify rough openings, field dimensions, substrates, anchors, fasteners, shims, perimeter joints, sealants, dissimilar-material isolation, trims, adaptors, and accessory scope against approved shop drawings.

• Finish and protection: Coordinate anodized or painted finish, color samples, exposed fasteners, entrance hardware, vents, accessories, adjacent materials, jobsite protection, cleaning, and touch-up requirements.

• Inventory, shipping, and installation sequence: Provide storefront and accessory quantities, required delivery date, opening priorities, packaging or sorting needs, site access, storage plan, fabrication responsibility, and installation sequence when expedited shipping or a rush order is required.

What to Send Boyd for a Series B450 Storefront Review

Send as much of the following project information as available:

• Project name, location, bid deadline, required response date, construction schedule, installation dates, and project contacts.

• Architectural drawings, elevations, storefront schedules, door schedules, hardware schedules, specifications, Division 08 requirements, and opening dimensions.

• Confirmation that the thermally broken B450 storefront system is required, along with the 2-inch face, 4.5-inch frame depth, center-set glass plane, inside- or outside-glazed condition, and screw-spline or shear-block assembly path.

• Glass makeup, glazing thickness up to 1 inch, safety glazing, coatings, tint, heat treatment, spacers, setting blocks, gaskets, glass stops, and glazing responsibility.

• Thermal requirements including CRF, U-value, energy-code targets, condensation criteria, entrance thermal strategy, perimeter conditions, and adjacent-wall construction.

• Design pressures, 0.02 CFM/FT. air infiltration at 6.24 psf, 10.00 psf water resistance, 37.50 psf structural performance, mullion spacing, reinforcement, expansion, anchorage, and project-engineer requirements.

• Storefront entrance requirements including selected door series, single doors or pairs, sidelites, transoms, thresholds, bottom rails, mid-rails, panic hardware, closers, access control, accessibility, clear openings, glazing, and finish.

• Vent requirements, screen needs, operation type, hardware, glazing, sightline, thermal, drainage, clearance, and storefront-compatibility requirements.

• Subsill, end-dam, sill-flashing, weep, perimeter-sealant, backer, anchor, fastener, substrate, adaptor, trim, and adjacent-construction details.

• Finish system, color, samples, accessory finish, entrance finish, exposed-fastener requirements, and adjacent-material coordination.

• Order quantities, extrusion or fabricated-frame scope, proprietary components, accessory package, delivery address, rush-order timing, packaging, opening-by-opening sorting, and installation sequencing needs.

Related Storefront, Entrance, Vent, and Architectural Resources

• Commercial aluminum storefront systems for non-thermal, thermally broken, XT dual-thermal, historic-replica, and vent selection guidance.

• Commercial aluminum storefront doors and entrance systems for narrow-, medium-, wide-, and XT thermal-stile door coordination.

• Series SV100 Zero-Sightline Vents for compatible storefront and curtain-wall openings requiring operable ventilation with minimal visual interruption.

• Commercial storefront and window accessories for subsills, mullions, adaptors, anchors, trim, perimeter components, and installation coordination.

• Storefront and curtain-wall applied architectural muntins for divided-lite, simulated-steel, and historic-grid appearance.

• Commercial curtain-wall systems for elevations that extend beyond typical storefront height, movement, anchorage, or multi-story conditions.

• Commercial aluminum finish options for anodized, painted, and project-specific storefront, entrance, vent, and accessory finishes.

• Commercial storefront project resources for installation instructions, quote forms, job-information forms, terms, warranty references, and service documents.

• Architectural resources, CAD details, product specifications, and project support for project documentation.