180.18 SECTION 505.1 AMENDED - ADDRESS IDENTIFICATION.
Section 505.1, Address Identification, of the IFC, is hereby amended by amended by deleting said section and inserting in lieu thereof the following section and table:
505.1 Address identification. 
New and existing buildings shall have approved address numbers, building numbers or approved building identification placed in a position that is plainly legible and visible from the street or road fronting the property. These numbers shall be black or white and shall contrast with their background. Where required by the Code Official, address numbers shall be provided in greater dimension or additional approved locations to facilitate emergency response. Address numbers shall be Arabic numbers. Numbers shall be a minimum height and a minimum stroke width as dictated by Table 505.1. Where access is by means of a private road and the building cannot be viewed from the public way, a monument, pole or other sign or means shall be used to identify the structure. Address numbers shall be maintained.
Table 505.1
Minimum Height and Stroke Width a,b
 
Distance from the centerline of the Public Way (ft)
Minimum Height (in)
Minimum Stroke Width (in)
Less than 100
4
1/2
100
199
6
3/4
200
299
8
1
For each additional 100
Increase 2
Increase 1/2
 
a Exterior suite identification, minimum height shall be 4 inches and stroke width shall be ½ inch.
b Interior suite identification, minimum height shall be 2 inches and stroke width shall be ¼ inch.