Aluminum Entrances and Storefronts
Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
Showing changes from Rev 7
to Rev 8
in Aluminum Entrances and Storefronts.
---
title: Aluminum Entrances and Storefronts
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## The Contractor shall treat the storefront as a single coordinated system, and the Architect, structural engineer, glazing trade, and adjacent envelope trades shall coordinate submittals so that all performance criteria are reconciled before fabrication begins.
−## An entrance and storefront assembly must simultaneously satisfy structural, thermal, water-control, air-control, fire-egress, accessibility, and durability requirements, and each performance category cross-couples to the others. {note}
+## An entrance and storefront assembly must simultaneously satisfy structural, thermal, water-control, air-control, fire-egress, accessibility, and durability requirements, and each performance category cross-couples to the others.
## A deeper thermal break that improves U-factor may require a different anchor preparation; a higher design pressure may require thicker glass or a heavier framing depth that changes the door stile width; a laminated inboard lite specified for ADA safety changes the IGU weight and therefore the hardware torque requirements. {note}
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### Field test results on the mock-up are the basis for accepting the system for production installation, and deficiencies identified in the mock-up shall be corrected and re-tested before production work proceeds.
−## NAFS Performance Class {toc}
+## NAFS Class and Performance Grade {toc}
### The storefront and entrance system shall be classified per AAMA/WDMA/CSA 101/I.S.2/A440 (NAFS), which classifies products by performance class and design pressure, denoted as "Class-Performance Grade" (for example, CW-PG50).
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−# Materials {toc}
+# Aluminum Extrusions {toc}
−## Aluminum Extrusions {toc}
+## Aluminum extrusions for framing members, door stiles, rails, mullion caps, and pressure plates shall conform to ASTM B221, alloy 6063 in temper T5 or T6 as appropriate to the structural and finishing requirements of each profile.
−### Aluminum extrusions for framing members, door stiles, rails, mullion caps, and pressure plates shall conform to ASTM B221, alloy 6063 in temper T5 or T6 as appropriate to the structural and finishing requirements of each profile.
+## Temper T6 shall be used for structural mullions, transom bars, and door stiles that carry hardware loads; temper T5 is acceptable for non-structural pressure plates, glass stops, and trim.
−### Temper T6 shall be used for structural mullions, transom bars, and door stiles that carry hardware loads; temper T5 is acceptable for non-structural pressure plates, glass stops, and trim.
+## Minimum wall thickness for primary structural members shall be 0.080 in. (2.0 mm).
−### Minimum wall thickness for primary structural members shall be 0.080 in. (2.0 mm).
+## Minimum wall thickness for non-structural trim shall be 0.062 in. (1.6 mm).
−### Minimum wall thickness for non-structural trim shall be 0.062 in. (1.6 mm).
+## Aluminum Alloy and Temper {toc}
−### Aluminum Alloy and Temper {toc}
−
```datasheet
label: Aluminum Alloy and Temper
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```
−## Thermal Break {toc}
+# Thermal Break {toc}
−### Thermally broken framing members shall use one of the following thermal-barrier methods, as selected by the Architect and confirmed in the framing manufacturer's submittal.
+## Thermally broken framing members shall use one of the following thermal-barrier methods, as selected by the Architect and confirmed in the framing manufacturer's submittal.
```datasheet
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```
−### Polyamide strut thermal breaks (typically 24 mm to 40 mm wide glass-fiber-reinforced polyamide) provide superior thermal performance, higher structural shear transfer between the interior and exterior aluminum profiles, and better fire performance compared to poured-and-debridged polyurethane. {note}
+## Polyamide strut thermal breaks (typically 24 mm to 40 mm wide glass-fiber-reinforced polyamide) provide superior thermal performance, higher structural shear transfer between the interior and exterior aluminum profiles, and better fire performance compared to poured-and-debridged polyurethane. {note}
−### Polyamide strut systems also accommodate dual-color finishes (different interior and exterior colors) more reliably than poured-and-debridged systems because the two aluminum halves are finished independently before assembly. {note}
+## Polyamide strut systems also accommodate dual-color finishes (different interior and exterior colors) more reliably than poured-and-debridged systems because the two aluminum halves are finished independently before assembly. {note}
−### Poured-and-debridged systems are acceptable for standard CW-class storefronts where the U-factor and CRF requirements are moderate and dual-color finishing is not required. {note}
+## Poured-and-debridged systems are acceptable for standard CW-class storefronts where the U-factor and CRF requirements are moderate and dual-color finishing is not required. {note}
−### Thermal Break Width (Polyamide Strut Systems) {toc}
+## Thermal Break Width (Polyamide Strut Systems) {toc}
```datasheet
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```
−### A wider polyamide strut yields a lower whole-product U-factor at the cost of a deeper framing profile and higher framing cost; a 24 mm strut is typical for CW-class systems targeting U-factors of approximately 0.42 to 0.48, while a 32 mm or 40 mm strut is typical for high-performance applications targeting U-factors below 0.38. {note}
+## A wider polyamide strut yields a lower whole-product U-factor at the cost of a deeper framing profile and higher framing cost; a 24 mm strut is typical for CW-class systems targeting U-factors of approximately 0.42 to 0.48, while a 32 mm or 40 mm strut is typical for high-performance applications targeting U-factors below 0.38. {note}
−### The thermal break dimension shall be confirmed against the U-factor and CRF requirements of the project.
+## The thermal break dimension shall be confirmed against the U-factor and CRF requirements of the project.
−## Glass and Insulating Glass Units (IGU) {toc}
+# Glass and Insulating Glass Units (IGU) {toc}
−### Glass shall conform to ASTM C1036 (flat annealed), ASTM C1048 (heat-strengthened or fully tempered), or ASTM C1172 (laminated).
+## Glass shall conform to ASTM C1036 (flat annealed), ASTM C1048 (heat-strengthened or fully tempered), or ASTM C1172 (laminated).
−### Where heat treatment is specified, tempered glass shall be heat-soak tested to reduce the risk of nickel sulfide spontaneous breakage.
+## Where heat treatment is specified, tempered glass shall be heat-soak tested to reduce the risk of nickel sulfide spontaneous breakage.
−### Coatings shall conform to ASTM C1376, and the coating type and surface location shall be indicated on the IGU submittal.
+## Coatings shall conform to ASTM C1376, and the coating type and surface location shall be indicated on the IGU submittal.
−### Outboard Lite — Heat Treatment {toc}
+## Outboard Lite — Heat Treatment {toc}
```datasheet
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```
−### Laminated inboard lites are increasingly the default for accessible-route storefront glazing because the laminated lite remains in the frame after breakage, preserves the air seal of the IGU, and reduces the hazard to occupants compared to a tempered monolithic lite that disintegrates into a curtain of cullet. {note}
+## Laminated inboard lites are increasingly the default for accessible-route storefront glazing because the laminated lite remains in the frame after breakage, preserves the air seal of the IGU, and reduces the hazard to occupants compared to a tempered monolithic lite that disintegrates into a curtain of cullet. {note}
−### For impact-rated assemblies, laminated lites are required.
+## For impact-rated assemblies, laminated lites are required.
−### For non-impact applications, laminated inboard lites are recommended at all ground-floor and accessible-route locations even where not required by code.
+## For non-impact applications, laminated inboard lites are recommended at all ground-floor and accessible-route locations even where not required by code.
−### IGU Make-Up {toc}
+## IGU Make-Up {toc}
```datasheet
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```
−### Warm-edge spacers (stainless steel, thermoplastic, or structural foam) significantly improve the condensation resistance at the IGU edge and modestly improve the whole-product U-factor compared to traditional aluminum box spacers. {note}
+## Warm-edge spacers (stainless steel, thermoplastic, or structural foam) significantly improve the condensation resistance at the IGU edge and modestly improve the whole-product U-factor compared to traditional aluminum box spacers. {note}
−### Warm-edge spacers shall be specified for all projects in climate zones 5 through 8 and for any project where CRF of 65 or higher is required.
+## Warm-edge spacers shall be specified for all projects in climate zones 5 through 8 and for any project where CRF of 65 or higher is required.
−### Low-Emissivity Coating Surface (Numbered from Exterior) {toc}
+## Low-Emissivity Coating Surface (Numbered from Exterior) {toc}
```datasheet
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```
−### The IGU manufacturer shall be certified by the Insulating Glass Certification Council (IGCC) or by the Insulating Glass Manufacturers Alliance (IGMA), with the certification confirmed by laboratory testing per ASTM E2190.
+## The IGU manufacturer shall be certified by the Insulating Glass Certification Council (IGCC) or by the Insulating Glass Manufacturers Alliance (IGMA), with the certification confirmed by laboratory testing per ASTM E2190.
−### Field-glazed (site-fabricated) IGUs shall not be used; all IGUs shall be factory-fabricated and delivered to the site as sealed units.
+## Field-glazed (site-fabricated) IGUs shall not be used; all IGUs shall be factory-fabricated and delivered to the site as sealed units.
−## Sealants and Gaskets {toc}
+# Sealants and Gaskets {toc}
−### Glazing pocket gaskets shall be extruded EPDM or silicone with the durometer specified by the framing manufacturer for the glazing pocket configuration.
+## Glazing pocket gaskets shall be extruded EPDM or silicone with the durometer specified by the framing manufacturer for the glazing pocket configuration.
−### EPDM gaskets shall conform to ASTM C509 or ASTM C864 as appropriate.
+## EPDM gaskets shall conform to ASTM C509 or ASTM C864 as appropriate.
−### Silicone gaskets shall be specified where high temperature exposure or extended UV exposure is anticipated.
+## Silicone gaskets shall be specified where high temperature exposure or extended UV exposure is anticipated.
−### Glazing Gasket Material {toc}
+## Glazing Gasket Material {toc}
```datasheet
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```
−### Perimeter sealants between the storefront frame and the adjoining construction shall be one-part or two-part silicone or polyurethane elastomeric sealant conforming to ASTM C920, Type S or M, Grade NS, Class 50 or 100 (movement capability).
+## Perimeter sealants between the storefront frame and the adjoining construction shall be one-part or two-part silicone or polyurethane elastomeric sealant conforming to ASTM C920, Type S or M, Grade NS, Class 50 or 100 (movement capability).
−### The sealant manufacturer shall confirm compatibility with the framing finish, the adjacent substrate (concrete, brick, EIFS, metal panel), and any backer rod or bond breaker used in the joint.
+## The sealant manufacturer shall confirm compatibility with the framing finish, the adjacent substrate (concrete, brick, EIFS, metal panel), and any backer rod or bond breaker used in the joint.
−### Perimeter Sealant Type {toc}
+## Perimeter Sealant Type {toc}
```datasheet
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```
−### Sealant joint width and depth shall comply with the sealant manufacturer's published joint design recommendations, with joint width sized to accommodate the calculated thermal movement of the framing relative to the adjoining construction.
+## Sealant joint width and depth shall comply with the sealant manufacturer's published joint design recommendations, with joint width sized to accommodate the calculated thermal movement of the framing relative to the adjoining construction.
−### Backer rod shall be closed-cell or open-cell polyethylene as specified by the sealant manufacturer.
+## Backer rod shall be closed-cell or open-cell polyethylene as specified by the sealant manufacturer.
−### Closed-cell backer rod shall not be used where the sealant manufacturer requires open-cell backer rod to prevent outgassing into the sealant joint.
+## Closed-cell backer rod shall not be used where the sealant manufacturer requires open-cell backer rod to prevent outgassing into the sealant joint.
# Framing System Configuration {toc}
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### The glazing pocket location within the framing depth defines the system as center-set, front-set, or back-set, which drives the relationship between the glass face and the framing face, the head and sill flashing detail, and the appearance of the system in elevation. {note}
+### Center-set is the typical default for standard commercial storefronts and provides a balanced appearance from both interior and exterior, front-set is used where the design requires a flush exterior face with a recessed interior reveal, and back-set is used in the inverse condition. {note}
+
+### The Architect shall confirm the glazing pocket location on the framing elevations and section details before submittal.
+
```datasheet
label: Glazing Pocket Location
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```
−### Center-set is the typical default for standard commercial storefronts and provides a balanced appearance from both interior and exterior, front-set is used where the design requires a flush exterior face with a recessed interior reveal, and back-set is used in the inverse condition. {note}
−
−### The Architect shall confirm the glazing pocket location on the framing elevations and section details before submittal.
−
## Mullion Spacing and Lite Size {toc}
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### Swing entrance doors integrated with aluminum storefront framing are categorized by stile width, which drives the available hardware preparations, the door's structural rigidity, and the appearance in elevation. {note}
+### The entrance door stile width shall be specified, selected to suit the required hardware preparations, structural rigidity, and elevation appearance.
+
```datasheet
label: Entrance Door Stile Width
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### Warranty exclusions for damage caused by improper cleaning, building movement beyond the system's tested capacity, or modifications by other trades shall be specifically identified in the warranty document; blanket exclusions shall not be accepted.