Exterior Signage
Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
Showing changes from Rev 1
to Rev 2
in Exterior Signage.
---
title: Exterior Signage
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# Environmental and Service Conditions {toc}
−## 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. {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 default for a suburban commercial site is Exposure B, but open-terrain and coastal sites move to C and D with substantially higher pressures. {note}
## Signs and their foundations shall be designed for the wind loads of ASCE 7-22 Chapter 29 for the exposure category applicable to the site.
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```
−## 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. {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.
```datasheet
…105 unchanged lines
### The monument foundation shall be a poured-in-place reinforced concrete footing sized for the sign face area, wind exposure, and soil bearing capacity.
−### 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. {note}
−
```datasheet
label: Monument Footing Plan Dimension (square)
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```
+### 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. {note}
+
+### The monument anchor-bolt diameter shall be specified, sized by the engineer of record to the anchor loading determined for the sign face and foundation.
+
```datasheet
label: Monument Anchor-Bolt Diameter
…6 unchanged lines
```
+### The monument anchor-bolt embedment depth shall be specified, sized by the engineer of record to the anchor loading determined for the sign face and foundation.
+
```datasheet
label: Monument Anchor-Bolt Embedment
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### 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. {note}
+### The pylon overall height shall be specified, and engineer-of-record structural sealing shall be obtained where the jurisdiction requires it above the specified height.
+
```datasheet
label: Pylon Overall Height
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## Each sign shall be served by a dedicated branch circuit.
−## 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. {note}
−
```datasheet
label: Branch Circuit (NEC 600.5)
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```
+## 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. {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. {note}
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```
−### 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. {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.
```datasheet
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## Raised characters shall be 5/8 in to 2 in high, sans-serif, and raised a minimum of 1/32 in, with Grade 2 Braille placed below the raised characters.
+```datasheet
+label: ADA Character Height
+type: range
+unit: in
+min: 0.625
+max: 2
+step: 0.125
+default: 1
+```
+
## Characters shall provide a minimum 80% luminance contrast with their background, light-on-dark or dark-on-light, on a non-glare matte finish.
## Tactile identification signs shall be mounted with the centerline 48 in to 60 in above the finished surface.
−## The default centerline mounting height for tactile identification signs is 60 in above the finished surface. {note}
−
```datasheet
label: ADA Tactile Sign Mounting Height (centerline AFF)
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```
−```datasheet
−label: ADA Character Height
−type: range
−unit: in
−min: 0.625
−max: 2
−step: 0.125
−default: 1
−```
+## The default centerline mounting height for tactile identification signs is 60 in above the finished surface. {note}
# Permits and Jurisdiction {toc}
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default: 1
```