boat_landing_plank_design.pdf

Concrete Plank ~ Top View End View

Connector Detail

3/4" dia. x 6' Rod with clevice on one end and threaded w/2 nuts and washers on opposite end.

Cross Plates 400 sq. in.

Cross Plate

Earth Anchor shall be clean and true so they turn on and off freely by hand.

FOREST SERVICE

U.S. DEPARTMENT OF AGRICULTURE

REGION NINE

NICOLET NATIONAL FOREST

CONSTRUCTION DETAIL

BOAT LAUNCH

CONCRETE RAMP NO SCALE

3"

3"

5' ad di tio na l r er od s ev en ly sp ac ed

3" 3"

12'

9 Rerods and 2 pieces of plate steel evenly spaced.

3/8" by 2 1/2" by 66" flat steel

(2 per slab)

Nut, and washer.

5/8" Galvanized Bolt, (2.25" Long)

5/8" Galvanized Bolt, Nut, and Washer.

6"

2.5" 1.75"1.75"

3"

Note: Use #4 Rerod spaced as shown above with ends 2" from concrete edges.

placed with center thru intersection of 2nd rerod and 3/8" x 2 1/2" flat steel.

6" PVC

(4 per slab)

6" PVC

NOTE ~ All threads on Bolts and nuts

1.5"

3" .75"Dia.

NOTE: THE INSIDES OF ALL PVC MUST

BE VOID OF ANY CONCRETE

MATERIAL TO ALLOW EASY

ACCESS FOR LIFTING HOOKS.

CIM-0913-19F-109-0913-04 Boat Landing Planks

Water Surface

Place 6" Crushed Aggregate under Ramp Base

Geotextile

2 Total ~ (one each edge) Use to level after excavation.

Place crushed rock between them prior to placement of the concrete planks.

45°

Cross-Plate Earth Anchor

FOREST SERVICE

U.S. DEPARTMENT OF AGRICULTURE

REGION NINE

NICOLET NATIONAL FOREST

SITE PLAN

CONCRETE RAMP

BOAT LAUNCH

0' 10'5'2.5' continuous around & between planks.continuous around & between planks.

8-10 +/- Planks

12'

3" Typically 5'

1'

1'

3" Steel Pipe

Crushed Rock

Lake Bottom

3 Ft Min Depth -14% Grade

Approx. 26 Ft

(8 cy)(6.5 compacted cy)

2' Crushed Aggregate (Grade D)

Approx. 21 Ft Finished Grade Flush with Adjacent Roadway

2-Inch 1-1/2 Inch 1-Inch 3/4-Inch 3/8-Inch

Sieve Size % Passing (Wt.)

90-100 20-55 0-15 0- 5

Rock Gradation woven or non-woven plastic sheet of at least 4 oz./sq. yd. Fabric shall have a minimum grab tensile strength of 100 lbs. and minimum enlongation of 50%, both determined

The geotextile shall be pervious by ASTM D-1682. Three foot overlaps minimum.

Concrete shall have a raked top surface consisting of 3/8" to 1/2" grooves angled 45° back either side of travel toward the lake on centerline (see drawing approximately 4".

grooves shall be right). Spacing between

2' Clean Fractured Rock (2" Max size)

Approximate water line NOTE: Underlay all aggregate and fractured rock with geotextile.

3" Steel Pipe

3" Steel Pipe

Work on this page is not to be performed by the contractor.

It is shown only to illustrate how the pieces fit together.

FOREST SERVICE

U.S. DEPARTMENT OF AGRICULTURE

REGION NINE

NICOLET NATIONAL FOREST

CONCRETE RAMP

BOAT LAUNCH

4" 45 o

FINISH DETAIL

CONCRETE

Concrete shall be precast with air entrainment and a 28 day break strength of 4500#. A minimum of 3 test cylinders shall be supplied by the contractor.

Concrete planks shall be delivered to locations identified in the "FAR REGULATIONS" Part I Section F - Deliveries or Performance.

DESIGN:

Method A - A mix design showing the proposed weights of aggregate, water, and cement per cubic yard of concrete shall be furnished to the Engineer.

Cement, Aggregate, and water shall be proportioned to obtain concrete with good workability.

Slump shall not be more than 4" (AASHTO T119 and Air Entrainment shall be 5% plus or minus 1% as determined by AASHTO T152 or T196

3/8" to 1/2" deep "V" groove.

Concrete shall have a raked top surface consisting of 3/8" to 1/2" "V" grooves angled back toward the lake on either side of travel centerline (see drawing right). Spacing between grooves shall be approximately 4".