A06 40512685 Afterbay Details Sht2.pdf

CLASS I RIPRAP EDGE

PROTECTION,

2' X 2' ADJACENT TO

SLAB, (TYPICAL)

8'

6" OF 34" GRAVEL LEVELING COARSE

TO BE SCREEDED TO TOP OF RAILS

SIX (6) W6 x 20 STEEL BEAMS, FABRICATE CROSS MEMBERS

AS REQUIRED TO KEEP PARALLEL

SEE ELEVATION VIEW BELOW

NOTES:

1. FORM PUSH-IN SLAB AT EXISTING BOAT GRADE, CONTRACTOR TO SUBMIT MEANS AND METHODS OF

CONSTRUCTION FOR REVIEW.

2. THE PUSH-IN SECTION SHALL BE CAST ON THE EXISTING RAMP AND ALLOWED TO CURE FOR MINIMUM OF 14 DAYS. SHORTER CURE TIMES MAY BE ALLOWED IF A HIGHER STRENGTH CONCRETE IS USED, IF

APPROVED BY OWNER.

3. THE EXISTING RAMP SHALL BE COVERED WITH A MIN. OF 2" LAYER OF SAND AND 2 LAYERS OF POLYETHYLENE BARRIER PRIOR TO CASTING THE PUSH-IN SECTION TO PROVIDE A SEPARATION AND SLIP

PLANE WHEN PUSHING THE SLAB INTO POSITION.

4. ALL SEPARATE POURS WILL REQUIRE REBAR PLACEMENT AS DESCRIBED IN NOTE 5.

5. JOINING REBAR SHALL BE EPOXIED INTO FIRST SLAB AND EXTENDED A MINIMUM OF 20" INTO SUBSEQUENT SLAB(S). CONTRACTOR MAY CAST TRANSITION SLAB FOR LEVELING THE TWO RAMPS VIA CAST IN PLACE CONCRETE, JOINING REBAR & EPOXY AS NOTED, REBAR MAY BE WELDED TOGETHER UPON

APPROVAL BY OWNER.

6. REINFORCEMENT: TWO(2) MATS CONSISTING OF #4 GRADE 40 REBAR 2' ON CENTER EACH WAY, OFFSET UPPER & LOWER MATS 1', ALLOW 2" OF CONCRETE COVER, EACH BAR SHALL HAVE A 4" HOOK AT

PERIMETER AND TIED TO PERIMETER BARS.

7. CONTRACTOR MAY ELECT TO FABRICATE ANGLE IRON ALONG EDGE OF OUTER STEEL SUPPORT BEAMS TO HELP DIRECT PUSH-IN SLAB DURING INSTALLATION. CONTRACTOR TO PROVIDE TYPE AND NUMBER OF

EQUIPMENT OF SUFFICIENT SIZE TO PUSH SLAB INTO FINAL POSITION.

8. CONTRACTOR IS RESPONSIBLE FOR PROTECTING THE EXISTING BOAT RAMP FROM DAMAGE. ANY

DAMAGE TO EXISTING RAMP WILL BE REPAIRED AT THE CONTRACTOR'S EXPENSE.

9. PROVIDE 2" CLEAR COVER FOR ALL REBAR REINFORCEMENT.

10. PLACE RIPRAP EDGE PROTECTION AT THE SAME GRADE OF PUSH-IN SLAB. KEY IN RIPRAP BY

MECHANICAL TAMPING METHODS TO PROVIDE FLUSH SURFACE.

PUSH-IN CONCRETE SLAB RAMP DETAIL

40'

(TYP).

SECTION VIEW

3"X3" CHAMFER LONG SIDE EDGES

6" OF 34" GRAVEL LEVELING COARSE TO

BE SCREEDED TO TOP OF RAILS

GRADE RIPRAP AT SAME RAMP GRADE

4' BEYOND END OF RAMP

W6 x 20 STEEL BEAMS, FABRICATE CROSS

MEMBERS AS REQUIRED TO KEEP PARALLEL

# 4 @ 24" ON CENTER - SEE

NOTE 6 ABOVE

PUSH-IN CONCRETE SLAB RAMP DETAIL

ELEVATION VIEW

EXISTING BOAT RAMP

MECHANICALLY PLACED CLASS I RIPRAP

10' (typ.)

(1.5" DEPTH)

8"1/2"RADIUS

30°

CONTRACTION CONTROL JOINT DETAIL

SAW CUT CONTROL JOINT

2. SCREED CONCRETE FOLLOWED BY GROOVING THE SURFACE.

1. CONCRETE FOR NEW RAMP IS A 3/4" MINUS; 6-1/2 BAG MIX

WITH A MIN 28 DAY STRENGTH OF 4000 PSI.

NOTE:

SLAB CONTROL JOINT DETAIL

NOTE:

GROOVE DEPTH - 3/4"

R A M

P S

LO

PE

GROOVED SURFACE PLAN

3. SAW CUT CONTRACTION JOINTS AFTER RAMP IS GROOVED.

40' A A'

PLAN VIEW

PLAN VIEW

PLYWOOD BULKHEAD :

LEAVE IN-PLACE.

JOINING REBAR,

SEE NOTE 5

8" THICK

SLAB

1. GROOVING SHALL

MATCH EXISTING BOAT

RAMP, CONFIRM WITH

NATIONAL PARK SERVICE

TRANSITION SPACE BETWEEN

RAMPS TO LEVEL TOGETHER

W/CAST IN PLACE, JOINING REBAR

& EPOXY REQ'D AS NOTED

SLOPE SAME AS EXIST. RAMP

(8-10% ±)

EDGES.

6"x 6" CHAMFER LONG SIDE

12" 21"

2-#4 REBAR CONTINUOUS

THROUGHOUT FOOTING

18"

6"

THICKENED EDGE DETAIL

6" 24"

# 4 @ 12" SPACING

FOR CAST IN PLACE RAMP

BOTH WAYS, SEE NOTE 2.

NOTES

1. THIS DETAIL APPLIES TO ANY TRANSITION PIECES

BETWEEN PUSH-IN-SLAB AND EXIST. RAMP.

CONTINUE THICKENED EDGE FOOTING AROUND

ENTIRE PERIMETER OF CAST-IN-PLACE CONCRETE.

2. EXTEND AND EXPOXY #4 BARS MIN 20" (12"

O.C.) IN EXISTING CONCRETE CONNECTIONS.

PROVIDE EXPANSION JOINT MATERIAL

ALONG COLD JOINT CONNECTIONS.

3. NO CHAMFER ALONG

SIDEWALK/BULKHEAD/EXISTING CONCRETE

CONNECTIONS.

4. PROVIDE 21

2" CLEAR COVER FOR ALL REBAR

REINFORCEMENT.

TRANSITION PIECES

DRAWN BY: DATE:

CHECKED BY: DATE:

APPROVED BY: DATE:

APPROVED BY: DATE: SH

EE

T:

of

APPROVED BY: DATE:

REVISED BY: DATE: Detail Sheet -P. Jagoda 9/18/20

Bighorn Canyon National Recreation Area Afterbay Boat Ramp Extension

P. Jagoda 9/18/20

AutoCAD SHX Text 8"