Exh 8AAGENDA ITEM #8A
JUNE 11, 2001
CITY OF ATLANTIC BEACH
CITY COMMISSION MEETING
STAFF REPORT
AGENDA: Status of Dune Crossover Projects
SUBMITTED BY: Timmy Johnson, Pazks & Recreation Director
DATE: June 4, 2001
BACKGROUND: Staff has been working with the City of Jacksonville to construct
three dune crossovers. The City of Jacksonville reviewed the plans
and informed us that because the crossovers aze for handicap
accessibility, they must have handrails. Currently, we have an
ordinance that addresses residential dune crossovers, which do not
require handrails. The funding is in the City of Jacksonville's
budget and the City will be reimbursed once the crossovers are
constructed.
Once we receive the permit from the State, the project will go to
bid. Please keep in mind, DEP may not allow us to begin
construction until the end of sea turtle nesting season, which is
October 31. Shorty Merritt from the City of Jacksonville informed
me that the funding will still. be in their budget.
The plan is to construct a dune crossover, which will include a bike
rack and shower at Sixth, Eleventh, and Thirteenth Street.
RECOMMENDATION: Authorize construction ofthe crossovers with handrails and
approve proceeding with the project.
ATTACHMENTS: Ordinance No. 25-96-29
Section 6-24 of the City Codes
REVIEWED BY CITY MANAGER:
AGENDA ITEM #8A
JUNE I1, 2001
ORDINANCE NO. 25-96-29
AN ORDINANCE OF THE CITY OF ATLANTIC BEACH,
FLORIDA, AMENDING CHAPTER 6-24 - BUILDINGS
AND BUILDING REGIILATIONS BY ADOPTING A SPECIFIC DESIGN.
FOR RESIDENTIAL DUNE CROSSOVERS
Whereas, it is the desire of the .City Commission of the City
of Atlantic Beach to adopt a specific design for residential dune
crossovers.
Whereas, the adoption of this design will protect the dune
system and allow a safe crossover for residential purposes.
Now, therefore, be it ordained by the City Commission of the
City of Atlantic Beach, Florida:
Section 6-24 - All residential dune crossover structures shall
be constructed in accordance with the "Beach Dune•Walkover" design
as displayed in Section 6-24 and a copy of which will be kept in
the City Clerk's Office and the Office of the Building Official.
Walkovers will have strict adherence of this design and shall not
vary more than 10o in height to allow for. changes in topography of
the dune system.
PASSED by the City Commission on first reading this 9th day
of September, 1996.
PASSED by the City Commission on second and final reading
this23rdday of September, 1996.
ATTEST:
2r~J
MAUR EN KING
City Clerk
~~~
N T. FLETCHER
Mayor, Presiding Officer
ApFyroved as to form and correctness:
~~'~i/~G~-----
LAN C ENSEN, ESQUIRE
City torney
B E A C H
TEPS AS REOUIRI
TYPICAL P L A N
SCALE 5 f 4" 1- 0"
' 2X8 JOIST " "
II II I 2X8 JOIST I~ II
o . , j0 OCEAN
2X TREADS
12 STRINGS
2x8 SUPPORT
BEAMS
2X6 DECK
HOT DIPPED
GALV BOLTS
k WASHERS
2X8 JOIST
(2) 2xa
SUPPORT
BEAM
4X4 SUPPORT
POST
~~ T-0" T'fP.
--~
T Y P I C A L 5 E C T 1 0 N
SCALE 1 / 4 t - 0 "
\BEACH STORM PROFILE
10'-0" (MAXIMUM EXPECTED RECESSION)
MAXIMUM NOTE: PLACE STEPS ON BEACH SIDE
A VEGETATION TO LEVEL OF MAXIMUM BEACH RECESSION
DURING A SEVERE STCRM.
D U N E WALK O V E R
4X4 SUPPORT
POST
20R RAMP
SLOPE
r
NOTES:
ALL LUMBER TO BE
PRESSURE TREATED.
ALL CONNECTIONS TO 8E
HOT DIPPED GALVANIZED
OR STAINLESS STEEL. ~ 9
4X4 MAX. SUPPORT POSTS ~ d
2X10 MAX. SUPPORT BEAMS ~ y
2X12 MAX. STAIR STRINGERS N ~.
2X12 MAX. JOISTS ~ ~
T THICK MAX. DECKING N ~
°
o u
SUPPORT POST SHALL NOT 'f y
BE ENCASED IN CONCRETE.
LA!! t/L\.NI'IU
AGENDA ITEM #8A
liJNE I1, 2001
BUILDINGS AND BUILDING REGULATIONS § 6-23
(h) Design conditions in gener¢I.
(1) Foundations for all major structures shall be designed for the horizontal and vertical
pressures generated by wave forces between the elevation of the design breaking
wave crests or wave uprush superimposed upon the storm surge and the stable soil
elevation of the site.
(2) All major structures, except mobile homes, shall be designed to withstand one
hundred forty (140) mph windspeeds. Horizontal wind velocity pressures shall not be
less than the values given below:
Basic Wind Velocity Design Pressure
(Pounds per Square Foot)
St¢nd¢rd Building Code
Height Pressure
(ft.l (Psfl
0-30 41.
31-50 54
51-100 65
101-200 79
201-300 92
301-~00 101
401-500 109
501-800 12 L
801-1000 133
Over 1000 `'.,137
Note: The above table is based upon the formula:
P = .00256 x VZ x (H/30)y', where: P =pressure in pounds/square foot
V 140 mph
H =height above grade in feet
(3) Appropriate shape factors shall be applied for resistance against overturning and
uplift as required elsewhere in this Code. Internal pressures on internal walls,
ceilings and floors resulting from damaged windows or doors shall also be considered
in the design unless the specified windows and doors have been tested by an approved
testing agency and have been shown to be capable of withstanding the design
pressures required herein.
'°" (4) Mobile homes shall conform to the Federal Mobile Home Construction and Safety
Standards of the Uniform Standards Code ANSI book A-119.1, pursuant to Section
320.823, Florida Statutes, in addition to the other requirements contained in this
chapter.
(5) A11 storm shutters shall be designed to conform with Part VI, Chapter 23, of the South
Florida Building Code, 1994 Edition. Copies of such Chapter 23 shall be kept in the
office of the building official and the office of the city clerk. -
(Ord. No. 25-86-17, § 1, 2-24-86; Ord. No. 25-95-27, § 2, 7-10-95)
Supp. No. 18 i 411
AGENDA ITEM #SA
JUNE I I, 2001
§ 6-24 ATLANTIC BEACH CODE
Sec. 6-24. Same-Nonhabitable major structures; residential dune crossover struc-
tures.
(a) Nonhabitable major structures need not meet the specific structural requirements of
section 6-23, except that they shall be designed to produce the minimum adverse impact on the
beach and dune system and shall comply with the applicable standards of construction found
elsewhere in this code. All sewage treatment and public water supply systems shall be
flood-proofed to prevent infiltration of surface water anticipated under design storm condi-
tions. Underground utilities, excluding pad transformers and vaults, shall be floodproofed to
prevent infiltration of surface water expected under design storm conditions or shall otherwise
be designed to function when submerged under such storm conditions.
(b) All residential dune crossover structures shall be constructed in accordance with the
beach dune walkover design as displayed in the plan attached to Ordinance No. 25-96-29, and
a copy of which will be kept in the city clerk's office and the office of the building official.
Walkovers will have strict adherence to this design and shall not vary more than ten (10)
percent in height to allow for changes in topgraphy of the dune system.
(Ord. No. 25-86-17, § 1, 2-24-86; Ord. No. 25-96-29, 9-23-96)
Sec. 6-25. Same-Minor structures:
Minor structures need not meet the specific structural requirements of section 6-23 except
they shall be designed to produce the minimum adverse impact on the beach and dune system
and shall comply with the applicable standazds of construction found elsewhere in this Code.
(Ord. No. 25-86-17, § 1, 2-24-86)
Sec. 6-26. Same-Location.
Construction, except for elevated walkways, lifeguard support stands, piers, beach access
ramps, gazebos, and coastal or shore protection structures, shall be located a sufficient
distance landward of the beach to permit natural shoreline fluctuations and to preserve dune
stability. Construction, including excavation, may occur to the extent that the natural storm
buffering and protection capability of the dune is not diminished.
(Ord. No. 25-86-17, § 1, 2-24-86)
Sec. 6-27. Same-Public access.
Where the public has established an accessway through private lands to lands seaward of
mean high tide or water line by prescription, prescriptive easement, or any other legal means.,
development or construction shall not interfere with such right of access unless a comparable
alternative accessway is provided. The developer shall have the right to improve, consolidate,
or relocate such public accessways so long as they are:
(1) Of substantially similar quality and convenience to the public;
(2) Approved by the local government; and
Supp. No. 18 ~ 412