Embed Size (px)
Citation preview
5' M
IN
.
RE
QU
IR
ED
PE
DE
ST
RIA
N
AC
CE
SS
R
OU
TE
(P
AR
)
(S
EE
N
OT
E 4)
STREET
18"
CONVENIENCE
STRIP (SEE
NOTE 5)
6" WIDE CURB
TYPE 1A
4' X 8' WITH (2) 2' X 4'
REMOVABLE PANELS
(10' SIDEWALK WIDTH MIN.)
TYPE 1B
6' X 10' WITH (2) 3' X 6'
REMOVABLE PANELS
(12' SIDEWALK WIDTH MIN.)
TYPE 1C
8' X 8' WITH (6) 2' X 4'
REMOVABLE PANELS
(14' SIDEWALK WIDTH MIN.)
TREE WELL COVER
OPTIONS 3 OR 4 ONLY,
SEE SHEET 2 OF 3.
4'-0"
CLE
AR
O
PE
NIN
G
5'-6"
1'-6"
4'-0"
CLEAR OPENING 2'-0"
10'-0"
3'-0"
4'-0"
CLEAR OPENING 3'-0"
8'-0"
2'-0"
4'-0"
CLEAR OPENING 2'-0"
SEE
NOTE 7
STREET STREET
6'-0" C
LE
AR
O
PE
NIN
G
7'-6"
1'-6"
4'-0"
9'-6"
1'-6"
TYPE 1: LARGE TREE WELL SIZE
TYPE 2: MEDIUM TREE WELL SIZE (USE FOR SIDEWALK WIDTHS 8' - 12')
5' M
IN
.
RE
QU
IR
ED
PE
DE
ST
RIA
N
AC
CE
SS
R
OU
TE
(P
AR
)
(S
EE
N
OT
E 4
)
TYPE 2B
5' X 5'
6" WIDE CURB
TYPE 2A
4' X 6'
STREET
TYPE 3: SMALL TREE WELL SIZE (USE FOR SIDEWALK WIDTHS 7' - 8')
5' M
IN
.
RE
QU
IR
ED
PE
DE
ST
RIA
N
AC
CE
SS
R
OU
TE
(P
AR
)
(S
EE
N
OT
E 4
)
TYPE 3B
3' X 6'
6" WIDE CURB
TYPE 3A
4' X 4'
PROPERTY LINE
6'-0"
CLEAR OPENING
5'-0"
CLEAR OPENING
4'-0"
CLEAR OPENING
6'-0"
CLEAR OPENING
4'-0
"
CL
EA
R O
PE
NIN
G
5'-0
"
CL
EA
R O
PE
NIN
G
4'-0"
CLE
AR
O
PE
NIN
G
3'-0"
CLE
AR
OP
EN
IN
G
4'-0"
4'-0"
CLE
AR
O
PE
NIN
G
30" DIAMETER
OPENING IF
OPTION 5 OR 6
COVER IS USED,
TYP.
SEE NOTE 7
2'-0"
2"x4" REDWOOD
HEADER, TYP.
TREE WELL SIZE OPTIONS
= TREE TRUNK ℄
1"x3"x18"
STAKE @
24"O.C. TO
HOLD
REDWOOD
HEADER IN
PLACE, TYP.
1"x3"x18" STAKE @
24"O.C. TO HOLD
REDWOOD HEADER
IN PLACE, TYP.
2"x4" REDWOOD
HEADER, TYP.
= TREE TRUNK ℄
= TREE TRUNK ℄
2"x4" REDWOOD
HEADER, TYP.
PROPERTY LINE
PROPERTY LINE
1"x3"x18"
STAKE @
24"O.C. TO
HOLD
REDWOOD
HEADER IN
PLACE, TYP.
2
A
2
B
2
C,D
C,D
2
2
A
C
C
2
2
8'-0"
48"
CLR MIN.
TYP.
48" CLR MIN.
TYP.
48" CLR MIN.
TYP.
TREE WELL COVER
OPTIONS 3 OR 4 ONLY,
SEE SHEET 2 OF 3.
TREE WELL COVER
OPTIONS 3 OR 4 ONLY,
SEE SHEET 2 OF 3.
BUREAU OF ENGINEERING
DEPARTMENT OF PUBLIC WORKS
SUPERSEDES REFERENCES
VAULT INDEX NUMBER:
APPROVEDSUBMITTED
CHECKED
PREPARED
CITY OF LOS ANGELES
STANDARD PLAN
S-450-4
GARY LEE MOORE, P.E.
CITY ENGINEERDEPUTY CITY ENGINEER
ENGINEER OF DESIGN
EDWARD ARRINGTON, S.E.
ALFRED MATA, P.E.
ANA TABUENA-RUDDY, PLA
BENÉT GARDNER, P.E.
BUREAU OF STREET SERVICES
BUREAU OF ENGINEERING
SHEET 1 OF 3 SHEETS
B-4729 S-430
S-444
S-456
S-663
TREE WELL SIZE AND COVER DETAILS
ADEL HAGEKHALIL, DIRECTOR
Electronically Signed by Edward Arrington, S.E. on 03/30/2021
B-4796
BUREAU OF ENGINEERING
OFFICIAL RECORD
04/23/2021
REGI
STER
ED PROFESSIONAL ENGINEER
STATE OF CALIFORNIAC I V I L
GARY LEE MOORE
No. C-49446
SECTION C-C, OPTION 3
DECOMPOSED GRANITE COVER
TREE WELL COVER OPTIONS
SECTION C-C, OPTION 4
MULCH COVER
2" THICK MULCH. START
MULCH FLUSH WITH
ADJACENT GRADE AND
SLOPE TOWARDS TREE
AT MINIMUM
1% SLOPE.
SECTION B-B, OPTION 2
REMOVABLE PANELS FOR
TYPE 1C TREE WELL SIZE
SET TOP OF ROOTBALL
PER S-456
2" THICK UNSTABILIZED
DECOMPOSED GRANITE (DG)
COMPACTED TO 80% COMPACTION
(SEE NOTE 10). START DG FLUSH
WITH ADJACENT GRADE AND
SLOPE TOWARDS TREE AT
MINIMUM 1% SLOPE.
REMOVABLE PANELS FOR TYPE 1 LARGE TREE WELL
SECTION A-A, OPTION 1
REMOVABLE PANELS FOR TYPE
1A AND 1B TREE WELL SIZES
SIDEWALK
TREE WELL COVER
OPTIONS 3 OR 4
2"x4" REDWOOD
HEADER, TYP.
TOP OF ROOT BALL
PER S-456
SIDEWALK
6" WIDE
CURB
REMOVABLE
CAST-IN-PLACE
PANEL PER
SECTION D-D
OPTION 5
NOTE: TYPE 1 TREE
WELL TO USE TREE
WELL COVER OPTION
3 OR 4 ONLY
TREE WELL COVER
OPTIONS 3 OR 4
REMOVABLE
CAST-IN-PLACE
PANEL PER
SECTION D-D
OPTION 5
TOP OF ROOT BALL
PER S-456
SIDEWALK
SECTION D-D, OPTION 5
APPROVED PERVIOUS
CAST-IN-PLACE COVER
3" THICK PERVIOUS
CAST-IN-PLACE
APPROVED TREE WELL
COVER (SEE NOTE 8)
SET FLUSH WITH
ADJACENT FINISH
SURFACES. FORM
OPENING USING
30" DIA. SONOTUBE
CUT TO DEPTH
(CAST-IN-PLACE
ONLY)
SECTION D-D, OPTION 6
APPROVED PERVIOUS
PRECAST COVER
FILL IN 1" MAX. GAP
WITH CRUSHED
AGGREGATE.
(SEE NOTE 9)
TREE PLANTING
PER STANDARD
PLAN S-456
6" WIDE
CURB
3" THICK PERVIOUS
PRECAST APPROVED
TREE WELL COVER
(SEE NOTE 8) SET
FLUSH WITH
ADJACENT FINISH
SURFACES
TREE PLANTING
PER STANDARD
PLAN S-456
MIN. 130 MIL
GEOTEXTILE
FABRIC LINER
BETWEEN TOPSOIL
AND BOTTOM OF
CAST-IN-PLACE
TREE WELL COVER
1"
NOTE: GEOTEXTILE FABRIC
TO BE USED ONLY FOR
PERVIOUS CAST-IN-PLACE
TREE WELL COVER OPTION
JOINT FILLER
(1/4" PRE-MOLDED
AT PERIMETER
AND AT ALL
JOINTS)
SIDEWALKTOP OF
ROOT BALL
PER S-456
TREE PLANTING
PER STANDARD
PLAN S-456
TREE PLANTING
PER STANDARD
PLAN S-456
SIDEWALK
SET TOP OF ROOTBALL
PER S-456
SIDEWALK
TREE PLANTING
PER STANDARD
PLAN S-456
TREE PLANTING
PER STANDARD
PLAN S-456
1"x3"x18" STAKE
@ 24"O.C.
TO HOLD
REDWOOD
HEADER IN
PLACE, TYP.
6" WIDE
CURB
6" WIDE
CURB
6" WIDE
CURB
1% (SEE
NOTE 10)
JOINT FILLER
(1/4" PRE-MOLDED
AT PERIMETER
AND AT ALL
JOINTS)
18"
CONVENIENCE
STRIP (SEE
NOTE 5)
MIN. 130 MIL
GEOTEXTILE FABRIC
BETWEEN TOPSOIL
AND BOTTOM OF
CAST-IN-PLACE
TREE WELL COVER
2"x4" REDWOOD
HEADER, TYP.
1% (SEE
NOTE 10)
1% (SEE
NOTE 10)
1% (SEE
NOTE 10)
TREE
WELL
COVER
OPTIONS
3 OR 4
JOINT FILLER
(1/4" PRE-MOLDED
AT PERIMETER
AND AT ALL
JOINTS)
SIDEWALKTOP OF
ROOT BALL
PER S-456
TREE
WELL
COVER
OPTIONS
3 OR 4
STANDARD PLAN NO.
VAULT INDEX NUMBER SHEET 2 OF 3 SHEETS
S-450-4 B-4796
BUREAU OF ENGINEERING
OFFICIAL RECORD
NOTES
ALL WORK SHALL BE CONSTRUCTED IN ACCORDANCE WITH THE LATEST STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION
(SSPWC) ADOPTED BY THE BOARD OF PUBLIC WORKS AND AS AMENDED BY THE LATEST CORRESPONDING CITY OF LOS ANGELES
DEPARTMENT OF PUBLIC WORKS BROWN BOOK.
1. TREE SPECIES, SPACING CLEARANCES, AND LOCATIONS SHALL BE APPROVED BY THE BUREAU OF STREET SERVICES, URBAN
FORESTRY DIVISION, PER TREE SPACING GUIDELINES, OR AS SPECIFIED ON APPROVED PROJECT PLANS. 48" MINIMUM CLEAR WIDTHS
TO BE MAINTAINED FROM EDGE OF TREE WELLS.
2. TREE/TREE WELL SHALL NOT BE PLACED IN FRONT OF BUILDING ENTRANCES AND EXITS FOR INGRESS AND EGRESS AS REQUIRED BY
THE FIRE DEPARTMENT.
3. THE APPLICANT SHALL OBTAIN A DIG ALERT IDENTIFICATION NUMBER BY CALLING USA (UNDERGROUND SERVICE ALERT) TOLL FREE
1-800-422-4133 MINIMUM TWO WORKING DAYS PRIOR TO EXCAVATION PER CALIFORNIA GOVERNMENT CODE SECTION 4216.
4. THE PEDESTRIAN ACCESS ROUTE (PAR) SHALL HAVE A MINIMUM CONTINUOUS CLEAR AND UNOBSTRUCTED WIDTH OF 5'. THE PAR
WIDTH SHALL EXCLUDE THE STREET CURB, TREE WELL OR TREE WELL COVER, AND PARKWAYS. PAR WITH A CLEAR WIDTH OF LESS
THAN 5' SHALL REQUIRE APPROVAL BY THE CITY ENGINEER. HOWEVER, IN CASES WHERE THE PAR IS LESS THAN 5', A MINIMUM OF 5' BY
5' CLEAR AND UNOBSTRUCTED PASSING SPACE SHALL BE PROVIDED AT INTERVALS OF NO GREATER THAN 200' ALONG THE SIDEWALK
WITH THE PASSING SPACE GRADE NOT TO EXCEED 2% IN ANY DIRECTION.
5. 18" CONVENIENCE STRIP MEASURED FROM BACK OF CURB SHALL BE REQUIRED AT ALL TREE WELLS IN BUS STOP ZONES AND FOR
TREE WELL LENGTH GREATER THAN 6', IF STREET PARKING IS PERMITTED.
6. WHEN NO PARKING IS PERMITTED, TYPE 1 LARGE TREE WELL SIZES SHALL TAKE PRECEDENCE OVER TYPES 2 AND 3 WHERE SITE
CONDITIONS ALLOW FOR ITS SIZE TO ACCOMMODATE TREE SPECIES AND REQUIRED PEDESTRIAN ACCESS ROUTE (PAR) PER
STANDARD PLAN S-444, EXCEPT AT 7' WIDE SIDEWALKS WHERE ONLY 3'x6' TYPE 3B SMALL TREE WELL SIZE CAN BE USED PER THIS
STANDARD PLAN.
7. TYPE 1 LARGE TREE WELLS SHALL HAVE APPROVED PERVIOUS REMOVABLE PANELS WITH TREE WELL COVER OPTION 3 OR 4, SHEET 2
OF 3 OF THIS STANDARD PLAN.
8. APPROVED PERVIOUS COVER OPTIONS SHALL BE MADE OF PERVIOUS CAST-IN-PLACE OR PERVIOUS PRECAST COVER IN ACCORDANCE
WITH SECTION 201-1.1.6 OF THE SSPWC WITH A MINIMUM INFILTRATION RATE OF 100 INCHES PER HOUR WHEN TESTED IN ACCORDANCE
WITH SECTION 211-3 OF THE SSPWC. FOR PERVIOUS CAST-IN-PLACE COVERS, A SURPLUS OF CONCRETE SHALL BE MAINTAINED
AGAINST THE FRONT SURFACE OF THE SCREED IN ORDER THAT LOW AREAS BE FILLED AS THE SCREED PASSES OVER. RODDING SHALL
BE HELD TO A MINIMUM AND CONCRETE CURING COMPOUNDS SHALL NOT BE PERMITTED. AFTER THE SURFACE IS FLAT, NO OTHER
FINISHING SHALL BE REQUIRED.
9.
1
2
" SIZE CRUSHED AGGREGATE COMPACTED TO FIRM AND UNYIELDING SHALL BE INSTALLED FOR APPROVED PERVIOUS PRECAST
COVER.
10. USE DECOMPOSED GRANITE (DG) OR MULCH WHEN TREE WELL COVER OR GRATING IS NOT CALLED OUT ON PLANS. DG SHALL BE 2"
MINIMUM THICK AT EDGES AND SLOPED DOWN MINIMUM 1% TOWARDS TREE TRUNK; THICKNESS SHALL BE REDUCED NEAR TREE
TRUNK. DG STABILIZERS / BINDERS SHALL NOT BE USED. DG OR MULCH SHALL NOT BE USED IN AREAS EXCEEDING A SLOPE OF 5% IN
ANY DIRECTION.
11. INSTALL TREE WELL COVER AFTER ALL WORK PERTINENT TO PLANTING HAS BEEN COMPLETED PER STANDARD PLAN S-456.
12. REFER TO STANDARD PLAN S-430 FOR WEAKENED JOINTS AT TREE WELL.
13. EXISTING SIDEWALK SHALL BE SAWCUT PRIOR TO INSTALLATION OF TREE WELL COVERS. WEAKENED PLANE JOINTS IN CONCRETE
PAVEMENT SHALL BE SAWED JOINTS. SEE SSPWC SUBSECTION 302-6.5.4 FOR DIMENSIONS AND OTHER SPECIFICATIONS. SAWCUT
OVERRUNS SHALL BE CLEANED AND FILLED WITH RAPID SET EPOXY ADHESIVE AND FINISHED TO SIDEWALK GRADE.
14. FOR ALL WORK PERTINENT TO TREE STAKING SEE S-663.
15. MAINTENANCE FOR ALL TREE WELL TYPES, ESPECIALLY TYPE 1, MUST BE APPROVED BY BUREAU OF STREET SERVICES URBAN
FORESTRY DIVISION.
16. REMOVABLE PANELS AND WOOD HEADERS SHALL BE TAKEN OUT, AS REQUIRED BY TREE GROWTH. AFTER PANELS AND LINER HAVE
BEEN REMOVED, SCARIFY SOIL BENEATH PANELS, AND FINISH WITH EITHER COVER OPTION 3 DECOMPOSED GRANITE COVER, OR
COVER OPTION 4 MULCH COVER.
STANDARD PLAN NO.
VAULT INDEX NUMBER SHEET 3 OF 3 SHEETS
S-450-4
B-4796
BUREAU OF ENGINEERING
OFFICIAL RECORD
