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STATE OF
ARKANSAS
No. 99 N t
3iCRATUALI'— A7
20 /0 0 20 40FT
SCALE: l"= 20'
Building Code Analysis
Scope of Work:
Project Address.
Occupancy
Construction Type:
Number of Buildings:
Maximum Height
Max. Occupant Load:
Required Parking.
Parking Provided
Owner -occupied new one-story 20,082 s.f.
Office Building
Lot 10 Corporate Hill Drive
Little Rock, Arkansas
Group B - Business Use
Type IV unprotected, unsprinklered
One, one-story
55' allowed (Table 400)
27' proposed
200 people
67 required (1 per 300 s.f.)
99 spaces (9' x 20'), including
4 handicapped spaces (13' x 20')
MARLAR ENGINEERING CO.$ INC.
1M�O AT1O
C°newhins CWrffVRVe 1 d Land Sr Cy°r r
63111 JOHN f. KQNNEDYsouL[vAAO
PHONE (bi) 763.1W7
Mx (101) 7530143
NORTH LITTLI ROCK, ARKANSAII 72116
DRAINAGE & DETENTION CALCULATIONS
Lot 10 Corporate Hill Addition
Little Rock, Arkansas
Based on 1.32 acres of area developed. All calculations based on the
Stormwater Management and Drainage Manual - 1985 + Addenda.
Cues = Natural Area = 0.44
Cdn = Developed condition,
Paved & Building Area @ 0.88 AC x 0.92 = 0.81
Lawns Area @ 0.44 AC x 0.44 = 0.19
Cd2s= Composite = 1.00 / 1,32 = QJJ
L = 240' Sheet Flow g 0.8%
tc = 5 minutes (from NOMOGRAPH for time of concentration fig. # 2-2)
12s= 8.5 "/hr (from rainfall chart on page 2-12 fig, # 2-4)
Rd - Ru = (0 75 x 8-5) - (0.44 x 5 0) = 4.17
Volume = 4.17 x 1.32 x 5 x 60 = 1,651 tuft
DETENTION VOLUME = 1.881 CUFT
Qu=AXRu
Qu= 1.32 x 2.20 = 2.90 cfs
Q025=CxIxA
CD-5 = 0.75
125 = 8.5 A = 1.32 acres
AC I.
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No. 1917 �t
Sr C. MA�/r��
Q025 = 0.75 x 8.5 x 1.32 = U�41 cfs ( - ? 90 cfs = 6.61 cfs excess)
USE 811 PIPE FOR OUTFLOW Qo-Qu as smallest allowed by LRPW detention
calculations porcedures.
f
MARLAR ENGINEERING CO., INC.
5318 John F . Kennedy Boulevard
North Little Rock, Arkonsos 72116
INCORPORATED Phone: (501 ) 753-1 987
REVISION DATE DESCRIPTION BY
PREPARED FOR: ALDERFER & ASSOCIATES
2316 DURWOOD ROAD
LITTLE ROCK. ARKANSAS 72207
TITLE: BOUNDARY & TOPOGRAPHIC SURVEY
LOT l0 CORPORATE HILL
ADDITION, LITTLE ROCK, PULASKI COUNTY, ARKANSAS
DRAWN BY: DATE JOB NUMBER:
LDJ I1-26-96 96-037
APPROVED BY: SCALE
FCM I'- 20' SHEET NUMBER C 2