Series B450XT Center-Set Thermal Aluminum Storefront System

Boyd's Series B450XT is an XT high-performance commercial aluminum storefront framing system with a dual pour-and-debridge thermal barrier and a center-set glass plane. The 2" sightline × 4.5" frame-depth system accommodates glazing up to 1" thick and combines exceptional thermal performance with the air, water, and structural performance required for demanding commercial storefront projects.

Series B450XT is ideal for new construction, storefront replacement, adaptive reuse, and cost-effective historic renovations. It is compatible with Boyd historic grids, screw-spline or shear-block construction, Series SV100 zero-sightline vents, heavy-duty, corner, and variable mullions, anodized and painted finishes, and Boyd commercial aluminum entrance systems. This combination gives architects, contractors, glaziers, and building owners a durable and flexible center-set storefront path for thermal performance, historic appearance, ventilation, entrances, and coordinated building-envelope design.

Boyd maintains a full inventory of storefront-system accessories, allowing the team to prepare, package, and ship orders anywhere in the United States while cutting normal delivery times in half. A Boyd storefront representative can help coordinate the B450XT framing, grids, muntins, vents, entrances, mullions, glazing, finishes, accessories, drawings, specifications, and installation requirements. To discuss the project or order storefront accessories, call 800.737.2800.

Series B450XT Storefront Product Details

Series B450XT center-set framing, thermal-barrier construction, dimensions, glazing capacity, compatibility, and published ASTM performance:

Series B450XT Product Data and Downloads

Use the current Boyd resources below for B450XT detail drawings, product specifications, installation support, XT storefront comparison, historic grids and muntins, zero-sightline vents, thermal entrance doors, accessories, and finish coordination.

When to Use the Series B450XT Storefront System

• Commercial storefront projects requiring XT high-performance aluminum framing with a dual pour-and-debridge thermal barrier.

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

• New construction, storefront replacement, adaptive reuse, and energy-conscious building-envelope projects requiring coordinated thermal storefront framing and entrance systems.

• Cost-effective historic renovations requiring compatibility with Boyd historic grids, applied muntins, finish coordination, and a center-set storefront profile.

• Projects requiring screw-spline or shear-block construction and heavy-duty, corner, variable, three-way, or four-way mullion configurations.

• Storefront elevations requiring compatible Series SV100 zero-sightline awning or casement project-out vents.

• Storefront entrance packages requiring coordination with Boyd D350XT medium-stile or D500XT wide-stile thermally broken entrance doors.

• Projects requiring anodized or painted storefront framing, entrance, vent, grid, muntin, mullion, and accessory finishes.

• Storefront and accessory orders where Boyd's maintained inventory, careful packaging, nationwide shipping, and reduced normal delivery time support the project schedule.

Choosing an XT or Standard Boyd Storefront System

You are viewing the B450XT center-set system in Boyd's XT high-performance thermal storefront line. Storefront selection should begin with the required thermal strategy, center-set or front-set glass plane, frame dimensions, glazing thickness, historic-grid requirements, entrance type, ventilation, mullion configuration, finish, water management, wind load, and opening conditions. Review the related systems below when the project requires front-set XT framing, standard thermal storefront framing, non-thermal framing, a dedicated historic-replica profile, zero-sightline ventilation, or coordinated XT thermal entrance doors.

Series B450XT Storefront System Advantages

• XT high-performance commercial aluminum storefront framing with a dual pour-and-debridge thermal barrier.

• Center-set glass plane for a conventional storefront appearance combined with superior thermal values.

• A 2" sightline and 4.5" frame depth accommodate glazing up to 1" thick.

• Published ASTM performance includes 0.06 air infiltration at 6.2 psf, 12.00 psf water resistance, and 20.00 psf structural performance.

• Compatible with Boyd historic grids for cost-effective historic renovations, adaptive reuse, restoration, and storefront replacement.

• Screw-spline or shear-block construction supports varied fabrication and field-assembly plans.

• Heavy-duty, corner, variable, three-way, and four-way mullion configurations support storefront layout and architectural flexibility.

• Compatible with Series SV100 thermally broken zero-sightline awning and casement project-out vents.

• Integrates with Boyd commercial aluminum entrance systems, including D350XT medium-stile and D500XT wide-stile thermal doors.

• Anodized and painted finish options support contemporary, historic, institutional, retail, and project-specific appearance requirements.

• A full storefront-accessory inventory supports coordinated subsills, mullions, adaptors, anchors, trim, perimeter components, and installation needs.

• Boyd representatives support system selection, grids, muntins, storefront layouts, entrances, vents, glazing, finishes, drawings, specifications, order preparation, packaging, and installation planning.

• Careful packaging and nationwide shipping can cut normal delivery times in half.

Common Series B450XT Storefront Coordination Items

• Thermal strategy: Coordinate the dual pour-and-debridge thermal barrier with the glazing package, thermal entrance doors, adjacent wall conditions, energy-code criteria, condensation requirements, U-factor or U-value targets, SHGC requirements, and perimeter details.

• Center-set glass plane: Confirm that the center-set B450XT appearance and glazing position match the architectural intent. Review B460XT when a front-set glass plane and curtain-wall-like exterior appearance are required.

• 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, thermal targets, and glazing responsibility.

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

• Historic grids and muntins: Confirm the grid pattern, lite divisions, muntin profile, dimensions, attachment, joints, finish, glass replacement strategy, prefabrication scope, field installation, alignment across frames, and coordination with entrance doors.

• SV100 vent integration: Confirm awning or casement project-out operation, vent dimensions, surrounding glazing pocket, screens, operating hardware, interior and exterior clearance, drainage, flashing, finish, and installation details.

• Mullions and spans: Coordinate opening width and height, vertical- and horizontal-mullion spacing, heavy-duty, corner, variable, three-way, or four-way configurations, wind pressure, glass weight, dead load, reinforcement, expansion, anchors, and intermediate horizontals.

• Air, water, and structural performance: Coordinate 0.06 air infiltration at 6.2 psf, 12.00 psf water resistance, and 20.00 psf structural performance with opening dimensions, mullion spacing, reinforcement, glazing, anchorage, and installation conditions.

• Entrance integration: Coordinate D350XT or D500XT door selection, entrance frames, single doors or pairs, sidelites, transoms, thresholds, panic hardware, closers, access control, clear openings, accessibility, 1-inch glazing, thermal continuity, and finish.

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

• 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, grids, muntins, entrance hardware, vents, accessories, exposed fasteners, 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 shorter delivery times are needed.

What to Send Boyd for a Series B450XT 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, vent schedules, hardware schedules, specifications, Division 08 requirements, and opening dimensions.

• Confirmation that B450XT center-set XT thermal storefront framing is required, including the 2-inch sightline, 4.5-inch frame depth, dual pour-and-debridge thermal barrier, screw-spline or shear-block construction, and installation responsibility.

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

• Thermal requirements including U-factor or U-value target, SHGC target if specified, energy-code criteria, condensation requirements, entrance thermal strategy, perimeter conditions, and adjacent-wall construction.

• Design pressures, 0.06 air infiltration at 6.2 psf, 12.00 psf water resistance, 20.00 psf structural performance, mullion spacing, heavy-duty or specialty mullions, reinforcement, expansion, anchorage, and project-engineer requirements.

• Historic-grid or muntin pattern, lite divisions, profile, dimensions, attachment, joints, finish, prefabrication scope, field-installation requirements, and alignment across storefront frames and entrances.

• Series SV100 vent requirements including awning or casement project-out operation, dimensions, screens, hardware, glazing, sightline, thermal criteria, drainage, clearance, and installation details.

• Thermal entrance requirements including D350XT or D500XT selection, single doors or pairs, sidelites, transoms, thresholds, rails, panic hardware, closers, access control, accessibility, clear openings, glazing, and finish.

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

• Anodized or painted finish, color, samples, grid and muntin finish, entrance finish, vent finish, accessory finish, exposed-fastener requirements, and adjacent-material coordination.

• Order quantities, extrusion or fabricated-frame scope, accessory package, delivery address, required delivery date, packaging, opening-by-opening sorting, site access, storage, and installation sequencing needs.

Related XT Storefront, Entrance, Vent, and Architectural Resources

• XT high-performance thermal storefront systems for B450XT center-set, B460XT front-set, D350XT medium-stile, and D500XT wide-stile thermal system comparison.

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

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

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

• Series SV100 Zero-Sightline Vents for compatible thermally broken awning and casement project-out ventilation.

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

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

• Historic-replica and steel-replica systems for storefront replacement, adaptive reuse, historic-grid, profile, finish, and reviewing-authority coordination.

• Commercial aluminum finish options for anodized, painted, custom-color, storefront, entrance, vent, grid, muntin, and accessory finishes.

• Architectural resources, CAD details, product specifications, and project support for B450XT documentation and coordination.