24_012 Addendum 2.pdf

February 2024

CITY OF ALPHARETTA INVITATION TO BID (ITB)

ITB Number: 24-012 ITB Title: Wills Park Wacky World Area Improvements ITB Addendum Posting Date: Friday, March 15, 2024

ADDENDUM #2

TO ALL BIDDERS:

1. The information included in this addendum is made part of the ITB noted above and part of any contract that may be awarded because of response to this ITB.

2. The purpose of this addendum is to supply new or revised information or documents.

3. If there is a conflict between any previously supplied information and the information contained in this addendum, the information contained in this addendum will prevail.

4. Bidders must acknowledge receipt of this addendum when submitting bid.

5. Remainder of this page intentionally blank. See addendum information beginning on the next page.

City of Alpharetta ITB 24-012, Wills Park Wacky World Area Improvements Addendum #2

BEGIN ADDENDUM

The City of Alpharetta (City) is changing the ITB documents in the following respects:

1. Sheet L4.01 of the Civil Plan Set prepared by Barge Design Solutions has been revised to provide clarification of Details 1 & 6. A new plan sheet bearing revision number 3 and a of date of 03/15/2024 is included as part of this addendum.

2. The City has received a number of questions regarding this procurement. The following is a list of those questions and the City’s responses.

Question #1: Are the retaining walls shown in plans existing or to be constructed??

Answer #1: There are three retaining walls to be constructed as part of this project. These are identified on Sheet C1.01 of the Barge Design Solutions plan set with Site Keynotes 11, 14, and 17. These are also identified on Sheet L2.00 as either “FLAGSTONE VENEER WALL” or “CONCRETE WALL”.

Question #2: On sheet EC1.01B, it shows above the construction exit area (Co) some tree protection fencing in red. It also shows Sd1-NS silt fence for this area as well. Are we to bid these red lines as tree protection fencing or silt fencing?

Answer #2: Along the parking lot there is both a row of Sd1-NS (compost filter socks) and a temporary chain link fence. As noted on the reference sheet, the red line indicates where the City is requiring a temporary chain link fence rather than tree protection fencing.

Question #3: On the SOI bid schedule, there is a line item #202 “Heavy Duty sidewalk” but his is not shown on the plans. What do we need to put in for its lump sum amount?

Answer #3: Refer to Sheet L2.00 of the Barge Design Solutions plan set for locations of the referenced line item.

Question #4: On the SOI bid schedule, there is a line item #203 “Standard sidewalk” but his is not shown on the plans. What do we need to put in for its lump sum amount?

Answer #4: Refer to Sheet L2.00 of the Barge Design Solutions plan set for locations of the referenced line item.

Question #5: On plan sheet L4.01 detail #6 it states that this is the detail for “Standard duty concrete pavement”. However, on the detail above it, it shows 4” thick Heavy Duty Concrete walkway. Is this pavement to be standard duty or heavy duty?

Answer #5: The referenced detail has been revised. Refer to the revised plan sheet included with this addendum.

Question #6: What type of pavers are being requested for the Vehicular grade brick pavers shown on detail #2 on plan sheet L4.02?

City of Alpharetta ITB 24-012, Wills Park Wacky World Area Improvements Addendum #2

Answer #6: As indicated in Note 3 of the referenced detail, paver specifications are presented on Sheet L1.00 of the Barge Design Solutions plan set.

END ADDENDUM

SE

E

PL

AN

NOTE:

LIGHT BROOM FINISH PERPENDICULAR TO WALK

L4.01

CONTROL JOINT, TYP.

L4.01

4 EXPANSION JOINT

EVERY 50', TYP.

SAME AS

WIDTH OF WALK

SEC

TIO

N

SEE

PLAN

2" THICK COMPACTED G.A.B., TYP.

98% STD. PROCTOR

COMPACTED SUBGRADE, TYP.

1' -0

1'-0"

SECTION

6" THICK HEAVY DUTY CONCRETE

WALKWAY THICKENED EDGES,

3,000 PSI W/ FIBERMESH

REINFORCEMENT, TYP.

THICKEN CONCRETE AT EDGES TO

1'-0" THICK FOR HEAVY DUTY

CONCRETE

2" THICK COMPACTED G.A.B., TYP.

6"

10" 1'-0"

NOTES:

1. CONCRETE SIDEWALK TO BE SCORED IN SQUARES EQUAL

TO WIDTH OF THE SIDEWALK.

2. PLACE EXPANSION JOINTS A MAXIMUM OF EVERY 50'.

EXPANSION JOINTS SHOULD ALSO BE PLACED BETWEEN ALL

RIGID FIXED OBJECTS AND THE NEW SIDEWALK.

3. THE CONTRACTOR SHALL INSURE THAT THE SIDEWALK

SECTION DOES NOT EXCEED THE 2% MAXIMUM

CROSS-SLOPE CRITERIA (ADA REQUIREMENT).

6" x 6" WWM

2" ROLLED EDGE, TYP.2% SLOPE MAX.

30'-0"

1'-4"

CONCRETE PAVING

BRICK BANDING WITH STACK BOND

PATTERN

EQ

EQ

L4.01

CONTROL JOINT, TYP.

SECTION

A

PLAN

L4.01

3 EXPANSION JOINT

UNDER PAVERS, TYP.

RAW STEEL METAL EDGE, 12 GAUGE X 8" TALL, FULL LENGTH

OF TURNDOWN, FLUSH W/ADJACENT BRICK, MECHANICALLY

FASTENED, 24" O.C. & 1" BELOW FINISH OF THE PAVERS.

10'-0" 10'-0" 10'-0"

EQ EQ

L4.01

EXPANSION JOINT, TYP.

2" THICK COMPACTED G.A.B., TYP.

95% STD. PROCTOR

COMPACTED SUBGRADE, TYP.

L4.01

4 EXPANSION JOINT,

TYP.

1'-0"

EQUAL

6"

EQUAL

8" THICK FOR HEAVY DUTY

CONCRETE

1 1/4" THICK LATICRETE 3701 FORTIFIED

MORTAR BED

HAND TIGHT JOINT;

MIN. 116" TO 18" MAX. POLYMER SAND

SWEPT, TYP.

LATICRETE 254 PLATINUM BACKBUTTER

THE PAVER, TYP.

HEAVY DUTY GRADE BRICK EDGE BAND,

SEE MATERIALS SCHEDULE, SHEET L1.00

2'-0"

EXPANSION JOINT SEE DETAIL

3/L4.01 TYP.

EQUAL

1'-0"

6" THICK HEAVY DUTY CONCRETE

WALKWAY THICKENED EDGES, 3,000 PSI W/

FIBERMESH REINFORCEMENT, TYP.

SECTION A

EQUAL EQUAL

8" SAW CUT JOINT PERPENDICULAR TO

WALK OR AS SHOWN ON PLANS, 14 DEPTH

OF CONCRETE, TYP.

8"

LIQUID JOINT SEALANT, 12" DEEP, SCREED

FLUSH, COLOR TO MATCH PAVEMENT, TYP.

2" PREMOLDED EXPANSION

JOINT FILLER CONFORMING

TO ASTM D 1752, TYPE 2

10"

135°

6"

CONCRETE FLUSH W/ FINISH GRADE

TYPICAL CONTROL JOINT

TYPICAL EXPANSION JOINT

6"

COMPACTED SUBGRADE TO

95% STD. PROCTOR, TYP.

3000 PSI CONCRETE WITH

FIBERMESH REINFORCEMENT, TYP.

COMPACTED G.A.B., TYP.2"

NOTES:

1. CONTROL JOINT SPACING EQUAL TO WIDTH OF WALK OR AS SHOWN PLANS OR DETAILS.

2. EXPANSION JOINTS 30' O.C., AND WHEN ABUTTING ADJACENT RIGID PAVEMENTS AND

STRUCTURES, OR AS SHOWN ON PLANS.

HEAVY DUTY CONCRETE SIDEWALK

LIGHT BROOM FINISH

PERPENDICULAR TO WALK

8" RADIUS

8" RADIUS, TYP.

EXISTING ASPHALT/CONCRETE SLAB, TYP.

2" Ø X 12" LONG S.S. SMOOTH

DOWEL. GREASE ONE END & WRAP

IN 5 MIL. POLY @ 18" O.C., TYP.

L4.01

4 CONCRETE PAVING

EXPANSION JOINT, TYP

L4.01

3 PROPOSED STANDARD

CONCRETE PAVEMENT, TYP

L4.01

CONCRETE TURNDOWN, TYP

BRICK PAVER BAND:

SEE SHEET L1.00 MATERIALS SCHEDULE

FOR TYPE, SIZE AND COLORS

BRICK PAVER BAND NOTES:

SLOPE PAVERS ACCORDING TO GRADING PLAN.

MAXIMUM VERTICAL DIFFERENCE BETWEEN TOP OF

ADJACENT PAVERS SHALL BE 18". MIS-SHAPEN OR

DEFORMED PAVERS ARE NOT ACCEPTABLE.

2" THICK COMPACTED G.A.B., TYP.

95% STD. PROCTOR

COMPACTED SUBGRADE, TYP.

L4.01

4 EXPANSION JOINT,

TYP.

EQUAL

4"

EQUAL

1 1/4" THICK LATICRETE 3701 FORTIFIED

MORTAR BED

HAND TIGHT JOINT;

MIN. 116" TO 18" MAX. POLYMER SAND

SWEPT, TYP.

LATICRETE 254 PLATINUM BACKBUTTER

THE PAVER, TYP.

HEAVY DUTY GRADE BRICK EDGE BAND,

SEE MATERIALS SCHEDULE, SHEET L1.00

2'-0"

EXPANSION JOINT SEE DETAIL

3/L4.01 TYP.

EQUAL

1'-0"

4" STANDARD CONCRETE WALKWAY

THICKENED EDGES, 3,000 PSI W/ FIBERMESH

REINFORCEMENT, TYP.

SECTION A

EQUAL EQUAL

1'-0"

4"

2" THICK COMPACTED G.A.B., TYP.

98% STD. PROCTOR

COMPACTED SUBGRADE, TYP.

1'-0"

4" THICK CONCRETE WALKWAY

THICKENED EDGES, 3,000 PSI W/

FIBERMESH REINFORCEMENT, TYP.

THICKEN CONCRETE AT EDGES TO

10" THICK

2" THICK COMPACTED G.A.B., TYP.

4"

10" 1'-0"

NOTES:

1. CONCRETE SIDEWALK TO BE SCORED IN SQUARES EQUAL

TO WIDTH OF THE SIDEWALK.

2. PLACE EXPANSION JOINTS A MAXIMUM OF EVERY 50'.

EXPANSION JOINTS SHOULD ALSO BE PLACED BETWEEN ALL

RIGID FIXED OBJECTS AND THE NEW SIDEWALK.

3. THE CONTRACTOR SHALL INSURE THAT THE SIDEWALK

SECTION DOES NOT EXCEED THE 2% MAXIMUM

CROSS-SLOPE CRITERIA (ADA REQUIREMENT).

6" x 6" WWM

2" ROLLED EDGE, TYP.2% SLOPE MAX.

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SCALE -1 HEAVY DUTY CONCRETE PAVEMENT

PLAN / SECTION N.T.S.

SCALE -2 HEAVY DUTY SIDEWALK

PLAN / SECTION N.T.S.

SCALE -4 TYPICAL CONCRETE + JOINTS

SECTION N.T.S.

SCALE -5 CONCRETE PAVEMENT @ EX. CONCRETE PAVEMENT

SECTION N.T.S.

H

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NOTES;

1. SEE CIVIL SHEET C2.01 GRADING AND DRAINAGE PLAN

FOR FINISH GRADE.

2. SEE MATERIALS PLAN L2.00 AND L1.00 FOR MATERIAL

SCHEDULE.

SCALE -3 STANDARD SIDEWALK

SECTION N.T.S.

SCALE -6 STANDARD DUTY CONCRETE PAVEMENT

PLAN / SECTION N.T.S.