NOTE This standard covers the design coordination, fabrication, and installation of building-exterior and site signage on commercial, institutional, and mixed-use construction projects, including office, retail, campus, healthcare, hospitality, industrial, and civic work. (1.1)

NOTE The included assemblies are ground-mounted monument signs, pylon and pole signs, channel-letter and dimensional-letter signs, cabinet and panel signs, post-and-panel wayfinding arrays, tenant directory signs, facade-mounted building-identification signs, and code-required exterior identification signs such as ADA building IDs, accessible-route markers, and exit-discharge signs. (1.2)

NOTE Exterior signage sits at the intersection of three disciplines that are usually drawn by three different parties — structural (foundations and wind load), electrical (branch circuit and disconnect), and architectural (copy, finish, and code compliance) — and the most common failures are coordination gaps at those seams rather than defects in any single trade. Because signage is permitted, procured, and installed late, it is also the work most often value-engineered or rushed, which is why a complete and code-correct specification is issued before the AHJ pre-application meeting rather than after. (1.5)

NOTE Interior signs, including room identification, interior directories, and inside-the-envelope wayfinding, are specified in Signage and are excluded here. (1.6)

NOTE Site and roadway lighting fixtures, poles, and controls are specified in Exterior Lighting; this standard governs only the illumination integral to the sign assembly. (1.7)

NOTE The footing design basis for general site equipment is established in Concrete Pads; the sign-specific anchor-bolt templates, embedment, and footing reinforcement called out here are coordinated against that standard. (1.8)

NOTE Electronic message centers and LED scoreboards beyond basic tenant identification are a specialized audiovisual and controls sub-scope requiring separate coordination and local zoning pre-approval, and are not covered in depth by this standard. (1.9)

NOTE The UL 48 15th Edition Standards Update Notice of October 2024, effective December 18, 2025, expands scope for wet-location signs, mass-notification signs, and signs shipped without a face; specifications issued on or after that date shall reference UL 48 Ed.15 with the R:18Dec2023 revision. (2.4)

NOTE Adoption of IBC Appendix H is jurisdiction-specific, and many AHJs have not adopted it or have adopted local amendments or a separate sign ordinance that supersedes it; the Contractor shall confirm the locally adopted sign code and cite it, not Appendix H, where the two differ. (2.5)

NOTE The Authority Having Jurisdiction governs exterior signage through two independent permits that are commonly issued and inspected separately — a sign permit covering height, area, setback, and structure, and an electrical inspection covering the field branch circuit and disconnect — and a sign that clears one but not the other will not receive a certificate of occupancy. The single most consequential quality step is the AHJ pre-application meeting, because local sign ordinances frequently amend or replace IBC Appendix H and govern what may be built before any design is finalized. (4.1)

NOTE UL 48 factory listing covers the sign assembly only; all field wiring, conduit, branch circuits, and disconnecting means fall under NEC Article 600 and are separately inspected by the AHJ electrical inspector. (4.4)

NOTE Wind load is the controlling environmental action for exterior signs, and the design pressure is set by the ASCE 7-22 exposure category for the site, not by the sign type; under-stating the exposure category is the most common cause of an undersized foundation. The 80%-case default for a suburban commercial site is Exposure B, but open-terrain and coastal sites move to C and D with substantially higher pressures. (5.1)

NOTE The finish system shall be selected for the project's ultraviolet and corrosion exposure, with a higher-performance fluoropolymer class specified for coastal and high-UV sites. (5.3)

NOTE Sign-type selection drives every downstream decision — structure, illumination, foundation, and permit path — so it is fixed first, before any material or electrical selection. The configurations below cover the dominant commercial assemblies; combination systems, such as a monument with an integrated tenant-panel array, are specified by combining the relevant fields. (6.1)

NOTE Illumination type determines the electrical scope, the face material, and whether the sign falls under NEC Article 600 at all; a non-illuminated sign carries no electrical work, while every illuminated type requires a branch circuit, disconnect, and automatic shutoff control. Internally illuminated LED cabinets are the dominant commercial choice; halo-lit reverse-channel letters and external floods are selected for their appearance against a facade. (6.3)

NOTE Channel letters are mounted either on a raceway or directly to the wall, and the choice is a coordination decision, not just an aesthetic one: a raceway is faster to install and easier to service but leaves a visible back-box, while flush direct-mount is cleaner but requires pre-drilled wall penetrations coordinated with the General Contractor. (6.5)

NOTE The foundation is the highest-consequence and least-visible part of an exterior sign, and it is the item most sensitive to the soil report: a footing sized for 3,000 psf bearing can be grossly inadequate at 1,500 psf, so for-construction foundation drawings are issued only after soils data is received. Sign-specific anchor-bolt templates and embedment are specified here, while the general footing design basis is cross-referenced to Concrete Pads. (7.1)

NOTE The typical footing for a 4 ft × 8 ft face, to be confirmed by the engineer of record against the geotechnical report, is 36 in × 36 in × 48 in deep with (4) #5 reinforcing bars each way and (4) 3/4-in galvanized anchor bolts at 18-in embedment. (7.6.2)

NOTE The typical commercial pylon, 15 ft to 35 ft in height, uses a 24 in × 24 in × 1/2 in A36 base plate with (8) 1-in anchor bolts at 24-in embedment in a drilled pier, sealed by the engineer of record above 15 ft in most jurisdictions. (7.7.2)

NOTE Material selection balances appearance, durability, and the illumination method: extruded aluminum dominates faces and returns, while masonry and stone are used for monument bases that read as permanent architecture. The face material must suit the illumination — a translucent acrylic or polycarbonate face for internally lit cabinets, an opaque face for halo-lit letters. (8.1)

NOTE A generic "powder coat" specification permits the lowest-grade formulation, so the AAMA performance class is always specified; AAMA 2604 (5-year class) is the commercial baseline, and AAMA 2605 (10-year fluoropolymer) is specified for coastal and high-UV exposure. (8.4)

NOTE The electrical scope for an illuminated sign is split between two trades, and the handoff is the most common source of field disputes: the sign contractor furnishes the sign assembly with internal wiring, while the electrical contractor provides the branch circuit, conduit, and disconnect up to a defined junction-box stub-out. That stub-out location is the contractual boundary and is defined explicitly in both this section and the electrical contractor's branch-circuit work. (9.1)

NOTE The one 20A circuit per sign is the default for a 2-wire circuit; a 30A circuit is permitted only where NEC 600.5 allows it for a 3-wire connection. (9.5)

NOTE The disconnecting means is a code requirement distinct from the panelboard breaker, and NEC 600.6 places it within sight of the sign, not at the panel; specifying only the breaker and omitting the local disconnect is a frequent and citable error. (9.6)

NOTE LED illumination is the dominant standard, and the specification fixes the driver class, drive voltage, and rated life rather than a wattage, because LED module systems are selected by the sign maker to the listing. The 12Vdc Class 2 driver and 50,000-hour module life are the commercial baseline. (9.8)

NOTE ASHRAE 90.1-2022 requires automatic shutoff for every illuminated exterior sign, and omitting the photocell or time-switch control is an energy-code non-compliance that can hold the certificate of occupancy; the control is therefore part of the base sign electrical scope, not an option. (9.10.1)

NOTE Where the local ordinance limits night-time sign luminance, the maximum face luminance shall not exceed the ordinance limit, and a value of 250 cd/m² is a common default where no stricter local figure applies. (9.10.3)

NOTE ADA tactile and Braille requirements apply to exterior signs that identify a permanent space accessible from the outside — a main entry, an accessible-route marker, or an accessible parking office — and these are frequently missed because the sign reads as wayfinding rather than identification. Where a sign designates such a space, the 2010 ADA Standards Section 703 tactile, Braille, contrast, and finish provisions apply in full. (10.1)

NOTE The default centerline mounting height for tactile identification signs is 60 in above the finished surface. (10.6)

NOTE Local sign ordinances, not the model code, are the controlling authority for most exterior signs, and specifying a sign before confirming ordinance compliance is the single most expensive coordination failure in this trade — a non-compliant height, area, or setback forces a full redesign late in the project. Electronic message centers compound this risk, because many jurisdictions require zoning approval of the EMC before any specification can issue. (11.1)

NOTE Where IBC Appendix H is locally adopted, wall signs shall not exceed 10% of the wall face area; where it is not adopted, the locally adopted area limit shall govern. (11.3)

NOTE Testing for electric signs is split between the factory and the field: UL 48 factory tests verify the assembly as built, while the AHJ electrical inspection verifies the field installation. The factory tests are evidenced by the listing mark, not re-performed in the field. (12.1)

NOTE Installation sequence is foundation-driven: the concrete foundation and anchorage are placed and cured, the electrical service is roughed in, and only then is the sign erected and connected. Disturbing this order — for example erecting a pole before the pier has cured — is a structural and schedule risk. (13.1)

NOTE Warranty terms are tied to the finish class and the LED life, and the finish warranty in particular is meaningless without its AAMA class — a 5-year warranty on an AAMA 2604 finish and a 10-year warranty on an AAMA 2605 finish are two different products. (15.1)

NOTE Spare LED modules, drivers, and translucent face material shorten the relamping and face-replacement turnaround for illuminated signs, where a single failed module is visible from the street and a face is a long-lead custom item. (16.1)