Supplementary Regulations
Frequency (cycles/second) | Column I Displacement (in.) | Column II* Displacement (in.) |
|---|---|---|
0 to 10 | .0022 | .0008 |
11 to 20 | .0016 | .0005 |
21 to 30 | .0010 | .0002 |
31 and over | .0005 | .0001 |
Notes |
|---|
*Steady state—Vibrations, for the purpose of this chapter, which are continuous or, if in discrete pulses, are more frequent than 60 per minute. Impact vibrations, that is, discrete pulses which do not exceed 60 pulses per minute, shall not cause in excess of twice the displacement stipulated. |
Type and Angle | Length (ft.) | Width (ft.) |
|---|---|---|
Single row 90 degree | 18 | 38 including drive lane |
Two rows 90 degree | 18 | 56 including drive lane |
Single row 60 | 18 | 34 including drive lane |
Two rows 60 | 18 | 52 including drive lane |
Single row 45 | 18 | 30 including drive lane |
Two rows 45 | 18 | 48 including drive lane |
Single parallel to aisle | 20 | 9 |
Figure 57-1 Parking Lot Layout ![]() |
Figure 57-2 ![]() |
Gross Floor Space (sq. ft.) | Loading or Unloading Berths |
|---|---|
25,000 feet or less | 1 |
25,001 to 84,000 | 2 |
84,001 to 156,000 | 3 |
156,001 to 236,000 | 4 |
Each 100,000 additional | 1 additional |
Total Spaces in Lot | Minimum No. of Handicapped Spaces |
|---|---|
Up to 25 | 1 |
26 to 50 | 2 |
51 to 75 | 3 |
76 to 100 | 4 |
101 to 150 | 5 |
151 to 200 | 6 |
201 to 300 | 7 |
301 to 400 | 8 |
401 to 500 | 9 |
Over 501 | 2% of total |
Each parking space designated for use by the handicapped shall consist of a rectangular area not less than 13 feet wide by 18 feet long, with a vertical clearance of 7.5 feet, shall be located in an area not exceeding two percent slope, and shall be located near and convenient to a level or ramped entrance accessible to handicapped persons. Parking spaces for the handicapped shall be signed in accordance with state law and restricted for use by the handicapped only. |
Afghan pine |
Bald cypress |
Bigtooth maple |
Bur oak |
Caddo maple |
Canopy trees |
Chinese pistache |
Crape myrtle |
Dogwood |
Eastern red cedar |
Eve's necklace |
Flowering crabapple |
Forest pansy redbud |
Lacebark elm |
Little gem magnolia |
Japanese maple |
Mexican plum |
Oklahoma redbud |
Ornamental pear |
Ornamental trees |
Osage orange |
Pecan |
Shumard oak |
Southern live oak |
Southern magnolia |
Texas red oak |
Western soapberry |