Section 81-261 - Definitions
Compensating recess
A portion of a zoning lot which, at the building height selected for determining compliance with the provisions of Section 81-26 (Height and Setback Regulations--Daylight Compensation), lies in the free zone (Zone A on the encroachment grid ), is not covered by any portion of a building and qualifies as compensating for encroachments beyond the free zone under the provisions of Section 81-264 (Encroachments and compensating recesses). (See illustration of Compensating Recess and Encroachment )
COMPENSATING RECESS AND ENCROACHMENT
(81-261.1)
Encroachment
A projection beyond the setback line , the free zone or the half-setback line by any portion of a building that exceeds the maximum height permitted at the street line . (See illustration of Compensating Recess and Encroachment )
Encroachment grid
A plan drawing of the zoning lot at any given height above curb level selected to determine compliance with the provisions of Section 81-26 and showing, for that height, street lines , setback lines , half-setback lines , Zone A (the free zone ), Zone B and Zone C ( encroachment zones ) and, where applicable, the ten-foot setback line . The encroachment grid serves as a device for measuring areas of encroachment beyond the free zone and areas of compensating recess within the free zone . (See illustration of Encroachment Grid )
ENCROACHMENT GRID
(81-261.2)
Free zone
That portion of a zoning lot , at any given height, which may be covered by a building without coverage constituting an encroachment that requires daylight compensation.
In addition to the area that lies behind a setback line or setback lines , the free zone shall include areas between the setback line and either the half-setback line or the ten-foot setback line , whichever is further from the street line , and which qualify as free zone areas under the middle one-third rule . The free zone is referred to as Zone A on the encroachment grid .
FREE ZONE
( 81-261.3)
Half-setback line
A line drawn parallel to a street line and halfway between the street line and the setback line . (See illustration of Setback Line and Half-Setback Line )
Middle one-third rule
The rule under which, for the middle one-third of the front lot line length, the free zone includes area between the setback line and either the half-setback line or the ten-foot setback line , whichever is further from the street line . However, on a corner lot the free zone does not extend beyond the setback line along an intersecting street . (See illustrations of Middle One-Third Rule )
MIDDLE ONE-THIRD RULE
(81-261.4)
Setback line
A line drawn in plan parallel to a street line and showing for a given building height the minimum depth to which a building is required to be set back from the street line by the applicable depth to height chart in Section 81-263 (Standard setback requirements). Required setbacks, established by the chart, increase with the building's height.
back from the street line by the applicable depth to height chart in Section 81-263 (Standard setback requirements). Required setbacks, established by the chart, increase with the building's height. (See illustration of Setback Line and Half-Setback Line )
SETBACK LINE AND HALF-SETBACK LINE
(81-261.5)
Street frontage zone
A portion of a zoning lot which lies within an area bounded by a continuous front lot line and either the center line of the block or a line 100 feet distant from and parallel to that front lot line , whichever is closer to that front lot line . There shall be a street frontage zone for each zoning lot street frontage. (See illustration of Street Frontage Zones )
STREET FRONTAGE ZONES
(81-261.6)
Ten-foot setback line
A line which is parallel to the street line at a depth of 10 feet and represents the minimum distance any portion of a building exceeding the maximum height at the street line is required to be set back from the street line . A greater setback distance may be required by a setback line or a half-setback line depending upon the building height for which such setback line or half-setback line is established.
TEN-FOOT SETBACK LINE ON AN ENCROACHMENT GRID
(81-261.7)
Zone A, Zone B, Zone C
"Zone A," "Zone B" and "Zone C" are zones on an encroachment grid defined as follows:
(a) Zone A is the free zone .
(b) Zone B , an encroachment zone, is the zone, exclusive of any area in Zone A and any area closer to the street line than the ten-foot setback line , which lies between the setback line and either the half-setback line or the ten-foot setback line , whichever is further from the street line .
(c) Zone C , an encroachment zone and penalty zone, is the zone, exclusive of any area closer to the street line than the ten-foot setback line , which lies between the half-setback line and the ten-foot setback line .