Page 157 - Des Moines - Zoning, Planning and Design Ch 134, 135
P. 157
DRAFT 135-1. BUilDiNG tYPeS
Roof Types
135-1.17 roof types of worship, or a unique roof for a more distinctive
The major components of any roof must meet the city hall or community center.
requirements of one of the roof types permitted per B. The roof type may not create additional occupiable
building type. Roofs for bay or bow windows and space beyond that permitted by the building type.
dormers are not required to meet a roof type. c. The shape of the roof must be different from those
1.17.1 rOOF terrAceS defined in this section, such as a dome, spire, or
vault, and not a gabled roof, hipped roof, butterfly
Roof terraces are permitted upon any roof type, roof, gambrel roof, mansard roof, roof with parapet,
provided either a tower is permitted for access or the or flat roof.
height allows for access.
A. Any wall around the roof terrace that is located 1.17.3 PitcHeD rOOF tYPe
within 5 feet of the street face of the building shall Refer to Figure 1.16-E. This roof type is a sloped or
meet the requirements of a parapet. pitched roof. Slope is measured with the vertical rise
B. Any overhead structures shall be located a divided by the horizontal span or run.
minimum 30 feet back from a street facade, unless A. low Pitched and Pitched.
a type 1 design exception (see 135-6.2) is approved 1. Low Pitched. The low pitched roof must be
and the overhead structure is designed as a pitched between 4:12 and 8:12 (rise:run).
component of the overall building design.
2. Pitched. The pitched roof must be sloped more
1.17.2 SPeciAl rOOF tYPeS than 8:12, preferably 12:12, for 1 and 1.5 story
Special cap designs not otherwise defined in this buildings. Slopes less than 8:12 are permitted on
section may be approved through a type 2 design any 2 story building.
exception (see 135-6.2) during the site plan review
process with the following requirements:
A. The building must warrant a separate status from
the majority of buildings in the district, with a
correspondence between the form of the cap and
the building use, such as a dome for a planetarium,
a dome for a place of worship, a steeple for a place
Gable Recessed
End
Mechanicals
Roof Pitched
Slope Roof
ridge parallel to street
Roof
Height upper story
upper floor
Parallel PItched
Roof
Slope
Roof
Roof Slope
Height
Roof
Height
upper floor
upper floor
Pitched Roof Type (Gable Roof)
Low Pitched Roof Type (Hip Roof)
Figure 1.16-E. Examples of Pitched Roof Type
CITY OF DES MOINES CHAPTER 135: PLANNING AND DESIGN DRAFT 135-1-65
