DEPARTMENT OF PLANNING AND PERMITTING

CITY AND COUNTY OF HONOLULU 650 SOUTH KING STREET, 7TH FLOOR ' HONOLULU, HAWAII 96813

Phone: (808) 523-4414 • Fax: (808) 527-6743

JEREMY HARRIS MAYOR

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RANDALL K. FUJIKI, AIA DIRECTOR

LORETTA K.C. CHEE DEPUTY DIRECTOR

May 8, 2000 (mt)

ENGINEERING AND POLICY MEMORANDUM NO, CEB-1-00

TO: ARCHITECTS AND ENGINEERS

frorAd FROM: RANDALL K. FUJIKI, AIA, DIRECTOR

DEPARTMENT OF PLANNING AND PERMITTING

SUBJECT: REVISED CURB RAMP AND DRIVEWAY DETAILS

Effective immediately, the design and contruction of new curb ramps and driveways for the City and County of Honolulu shall comply with the attached Standard Details R-25A and R-29A, dated April 2000. The Standard Details are being revised to comply with the latest American with Disabilities Act requirements for accessibility.

This supersedes the Standard Details, R-25, dated September 1992 and R-29, dated September 1984.

Should there be any questions, please contact our Civil Engineering Branch at 523-4731.

RKF:ky Attachment

g: curb/dw.std

CORB RETURN TYPE DRIVEWAY MAY BE PERMITTED FOR PARKING AREAS EXCEEDING

• 100 SPACES, ARE STATIONS AND HOSPITALS.

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C.71 14-j a (A M CP "1 0

PROVIDE KEYED JOINTS BOTH SIDES. (SEE DETAIL "A- FOR

A -- NEW CONSTRUCTION).-\ -4 1

7 X co < M . I

\-SCORE LINE WIDTH PAV

WARP LINES (NO SCORING)

■ =I . o 1

FOR FULL ' D SIDEWALY

/ . (-0 "

STANDARD CONC. DROP CURB

•

.

•

-

. .

A-- 2 - VARIABLE

STANDARD CONC. DRIVEWAY CURB

SCORE LINES TO BE SPACED EQUALLY MAXIMUM SPACING 4.-o"—/

. •

‘f•NNN.. . . \\_• •

e.-

0" SCORE LINES FOR MONOLITHIC

- STANDARD CONC. CONSTRUCTION OF CURB AND DRIVEWAY APRON.

DROP CURB

- .

PLAN \- LIMITS OF REINFORCEMENT. 4" THICK CONCRETE REINFORCED WITH 6"X6-W2.9XW2.9 GAIN. WELDED WIRE FABRIC FOR

SCALE: 1/4"=1*-o" RESIDENTIAL DISTRICTS. 6" THICK FOR ALL OTHER DISTRICTS SURFACE SHALL BE BROOM FINISHED.

4'-0" VARIABLE 4'-0"

STANDARD CONC. STANDARD CONC. STANDARD CONC.

PROPERTY DROP CURB DRIVEWAY CURB DROP CURB Tor. OF

UNE GRADEA CURB

. . . . • •

. , . - - -i--.

* MATCH WIDTH OF EXISTING SIDEWALK ELEVATION

WHENEVER POSSIBLE SCALE: 1/4"•=1'-0"

as BREAKOVER AND DEPARTURE ANGLES

SHOULD NOT EXCEED 10 DEGREES OR 17% 3/4" .03 4- >

VARIABLE R=

GUTTER ..., cr■ a

VARIES 3*-0" MIN.* < c4 es

LENGTH

L.% o vs

.

z L,I m La (...) ce 0 L.,.. z al ce L.. 0 cr) 8— m =

' UNES SCORING)

- us - —

48:1 MAX.

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DETAIL "A" 1 --

SCALE: 1 -1/2"=1'-0" (NEW CONSTRUCTION)

SECTION A-A r SEE SECT. A-A

SCALE: 3/8"=-1'-0" t- I f-R=1" /

NOTES: i / -f--

1. FOR EXTENSION TO EXISTING DRIVEWAY, SCORING AND FINISH SHALL MATCH IMMO .4 1"

EXISTING SCORING AND FINISH. FOR DRIVEWAY CONSTRUCTED IN BUILT UP AREAS, . Ll: SCORING CONFORMING TO SCORING AT ADJACENT DRIVEWAYS MAY BE AUTHORIZED.

1-#4 BAR7 —

2. FOR NEW SUBDIVISIONS, PROVIDE CENTERLINE ROADWAY STATIONING TO THE CENTERLINE OF THE DRIVEWAY (APPLICABLE TO STD. DET. R-7). ALTERNATE DETAIL THIS DETAIL IS FOR GUIDANCE ONLY. A DESIGN DETAIL MAY BE REQUIRED FOR EACH SPECIFIC SITE. THE DETAIL MUST COMPLY WITH THE REQUIREMENTS SHOWN.

SCALE: 3/8"=1'-0"

_

CITY & COUNTY DRIVEWAY APRON STANDARD R-29A

OF HONOLULU DETAILS

SCALE: AS NOTED APRIL 2000 _

DRIVEWAY VARIES i OF CURB AS REQ . D.-\ SLAB

STD. CONC. **SLOPE:

ACCESSIBLE ROUTE

SLOPE:

20:1 / ■ -1-- -1 ___. — — •-• ......... II.- — -* — — — '.. . •

< \ — 4* CONC. SLAB WITH 6"X6-W2.9XW2.9 GALV. MESH FOR RESIDENTIAL DISTRICTS.

SEE ALTERNATE DETAIL-\ 6" CONC. SLAB WITH 6"X6"-W2.9XW2.9 FOR MONOUTHIC CONSTRUCTION MESH FOR AU. OTHER DISTRICTS. OF CURB AND DRIVEWAY APRON

ROUGHEN CONCRETE SURFACE 48:1 BOTH NOTES ' BY BROOM FINISHING IN THE I DIRECTIONS

r PROPERTY

DIRECTION SHOWN. (MAX) LINE 1. WHEN NECESSITATED BY EXISTING PHYSICAL CONDITIONS.

- - CUSTOM-DESIGNED CURB RAMPS SHOULD BE USED SUBJECT

. . ._ . ' • • ' •

SCORP-INE---.,,,• - .-- . . . . -

'

•

. - .. I • * •

.. • • .

• .

- TO CITY'S APPROVAL.

7-COREUNE 2. SUBJECT TO FIELD CONDITIONS, THE CITY SHALL DETERMINE THE FINAL LOCATION OF THE CURB RAMP.

. . . . . • 3. AT INTERSECTIONS CURB RAMPS FOR EACH CROSSWALK ARE

PREFERRED AND SHALL BE IN LINE AND WITHIN THE CROSS -

. WALK. HOWEVER A SINGLE CURB RAMP FOR DIAGONAL

• . ..• • CROSSWALKS CAN BE APPROVED IF THE DESIGN DETAIL IS

. ACCEPTABLE BY THE CITY.

- . . 4. FOR AN EXISTING SIDEWALK, ENTIRE SIDEWALK BETWEEN

.: . NEAREST SCORE LINES SHALL BE REMOVED.

- 101 MAX. --..

48:1 MAX.. ----

- c`i't -=

• ''. - • .

•

i : .• ' • . -

• .

. o I .. • 5. FOR SIDEWALK WIDTHS LESS THAN 12 . USE DETAIL FOR

RAMP AT NARROW SIDEWALKS.

5. - 0"MIN. 3 .-0" 5 . -0"MIN. STANDARD 6" 6. THIS DETAIL IS INTENDED AS A GUIDEUNE FOR NEW CURB CONSTRUCTION. A SITE SPECIFIC DETAIL THAT MEETS GUTTER

8 . -0"MAX. RAN

SCALE: 1/8"

PROPERTY LINE 5'-O" 3. -0 GRADE- 1 MIN.

\

8.-0"MAX. HIGH CURB RAMP THESE REQUIREMENTS SHALL BE SHOWN ON THE PLANS.

= 1 . -0" 7. IN ADDITION, PASSING SPACES ALONG NEW SIDEWALKS SNAIL BE PROVIDED AT MAXIMUM 200 . INTERVALS AS

5.-0" /TOP OF REQUIRED BY ADA GUIDELINES. THE PASSING AREA SHALL

MIN. 1 CURB BE A MINIMUM 5' WIDE BY 5' LONG AS FEASIBLE.

8. NO PULLBOXES, HANDHOLES, MANHOLES, ETC. SHALL BE

' . . • . ALLOWED IF THEY CONTAIN ANY OPENINGS > 1/2" AND

ELEVATION '-GUTTER UNE ARE OF A POTENTIALLY SLIPPERY SURFACE.

SCALE: 1/8"=1.-0" 9. TRANSITIONS FROM RAMPS TO GUTTERS AND STREETS SHALL

MIN. ft. BE FLUSH AND FREE OF ABRUPT CHANGES IN LEVEL THE

CHANGES IN LEVEL THE MAXIMUM SLOPES OF ADJOINING

8 .-0" MIN. 4' MIN. 1 GUTTERS, ROAD SURFACE IMMEDIATELY ADJACENT TO THE

ACCESSIBLE ROUTE SHALL NOT EXCEED

- SAWCUT 1 nt 1TITR --,

CURB RAMP, OR 20:1. I ....

' ...

I 12:1 I _ I

20:1 \ r 1 --.....

, • - . . vosaismillin1111 1

" 7"

4" CONCRETE ON 6 SELECT

BORROW, PER DETAIL R-28. PROPERTY STANDARD 48:1 BOTH

— DIRECTIONS

LINE-1 DROP CURB

(MAX)

_ 1 _ _ ,.__ _ .21_ 1 - -- - - —

SCALE: 1/4"=1.-0" >c <

RAMP FOR 12' MIN. SIDEWALK (TYPE A) . ••• I 12:1 20-1 1:' (4 I • :f,',• t MAX.. • -.2-- I < 1

"-a 7

SEE NOTE 5 & 6 03 <

BROOM ..

5'-0" 3. -0"MIN. STANDARD CURB FINISH

PROPERTY 12 .--0"MAX. 1 12.-0"MAX. AS REOUIRED * -Iddil GUTTER

LINE- \ ... 1111 ,

\ ....• • •,.• • .. GUTTER -/ 6.-0" M --STANDARDIN.

' ...000M.:;;X • . . : • •48 • . , 12.-0"MAX. DROP CURB

• • '• FINISH ...• '. : 12:1 : : :.MAX. :: : i -12:1 ' : .. :'. • ,.. .... ': "*.-: . • - . . MAX. . . •

' -•; ., (1.Yr",-)• - -. ,••.:' : • 7--- ' ' •:: 1 RAMP AT CURBED DRIVEWAY

: co

••■• t • ...

.. .. ..- ., . '09 * • - . • . :-.- • : -4- :

SCALE: 1/8"=1 . -0"

' • - • • • 1 '' • F41 * • • . :. ' .. / . . • ' • i . \ . . 1 —

6'-O" MIN.

SIDEWALK

_J'DROP-1 • . • \--STANDARD -- I / BEYOND

GUTTER CURB PLAN CURB

1

PROPERTY LINE SCALE: i/8"1'-O"20:1 ,-- - -- - - --- t

GRADE - \ STANDARD CURB AS \\\

TOP OF

I

1 3.-0" MIN. 5. -0" 3.-0" MIN 1 REQUIRED BY EXISTING

CONDITIONS tf.i.," -

CURB- \ I

4" CONCRETE ON 6" SELECT BORROW, PER DETAIL R-28.

ELEVATION \ -GUTTER LINE SECTION

SCALE: 1 /8" = 1 . --0" SCALE: 1/4"=1'-0"

RAMP AT NARROW SIDEWALK- UNDER 12 (TYPE B)

CITY & COUNTY OF HONOLULU

SCALE: AS NOTED

CURB RAMP APRIL 2000

STANDARD I R 25A DETAILS