Built above grade, these structures are designed for live load storage of autos. They commonly have either no exterior walls or partial exterior walls and are usually Class A or B buildings, and in some cases Class S.
While the lower quality structures do not have office area, the better qualities have some small office and service areas. There is low-level lighting and adequate plumbing for office restrooms and service areas.
The quality of these structures can be influenced by their design characteristics. Ramp designs vary from separate and exclusive ramps, which separate the travel and the parking/unparking operations, to continuous sloping floor or adjacent ramp, which have both the travel and parking operations integrated within the same space. The determination of the type of ramp used is based on the site's shape and dimensions and the parking demand characteristics. The costs are based on the number of stories where there is always one more parking level (rooftop) than stories.
The following are not included in the costs: Pedestrian bridges, signs and parking or service equipment.
Availability of Elevators by Area for this occupancy: Yes
Marshall Valuation Service sections: 14 and 44.
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Class |
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Quality |
A |
B |
C |
D |
H |
M |
P |
S |
W |
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Low |
40 |
40 |
-- |
-- |
-- |
-- |
-- |
35 |
-- |
|
Average |
40 |
40 |
-- |
-- |
-- |
-- |
-- |
35 |
-- |
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Good |
45 |
45 |
-- |
-- |
-- |
-- |
-- |
40 |
-- |
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Excellent |
45 |
45 |
-- |
-- |
-- |
-- |
-- |
40 |
-- |
Class A (Fireproof Structural Steel Frame):
|
Quality |
Exterior Walls |
Interior Finish |
Mechanicals |
HVAC |
|
Average |
Partial walls, brick, block, concrete, little trim |
Unfinished, small office and service area |
Low-level lighting, drains, minimum restroom for office |
None |
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Good |
Partial walls, brick or concrete, ornamentation |
Unfinished, except good office and service area |
Reading-level lighting, restrooms and service plumbing |
None |
Class B (Reinforced Concrete Frame):
|
Quality |
Exterior Walls |
Interior Finish |
Mechanicals |
HVAC |
|
Low |
Low parapets, precast frame and floors, minimum finish |
Unfinished, minimum extras |
Minimum lighting & plumbing |
None |
|
Average |
Partial walls, brick, block, concrete, plain finish |
Unfinished, small office and service area |
Low-level lighting, drains, minimum restroom for office |
None |
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Good |
Partial walls, brick or concrete, ornamentation |
Unfinished, except good office and service area |
Reading-level lighting, restrooms and service plumbing |
None |
Class S (Metal Frame and Walls):
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Quality |
Exterior Walls |
Interior Finish |
Mechanicals |
HVAC |
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Lowest |
Demountable type, exposed steel frame, cable rails |
Unfinished, no extras |
Minimum lighting, drains only |
None |
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Low |
Demountable type, exposed steel frame |
Unfinished, some masonry shear walls, minimum extras |
Low-level lighting, drains, minimum personnel plumbing |
None |