13750 San Pedro Ave

Suite 300

San Antonio, TX 78232

O 210-224-2800

F 210-545-3103

rsandh.com

LAREDO INTERNATIONAL AIRPORT ADDENDUM NO. 3 CARGO APRON PHASE 14 REHABILITATION June 25, 2020 Page 1 of 2

ADDENDUM NO. 03

DATE: June 25, 2020

TO: All Plan Holders

FROM: John Hippchen, P.E., RS&H Project Manager

RE: Laredo International Airport

Cargo Apron Phase 14 Rehabilitation

RS&H Project No.: 2230066000

This Addendum is hereby made a part of the Contract Documents, Specifications, and Drawings of the

above referenced project. All other requirements of the original Contract Documents, Specifications, and

Drawings shall remain effective in their respective order. ACKNOWLEDGE RECEIPT OF THIS

ADDENDUM (PAGES 1 THRU 2 PLUS ATTACHMENTS) BY INSERTING ITS NUMBER AND DATE IN

THE PROPOSAL FORM.

A. MODIFICATIONS TO TECHINICAL SPECIFICATIONS

1. Replace Specification G-210 page 2 with attached revised Specification G-210 page 2.

a. Added requirements regarding card reader/keypad.

B. MODIFICATIONS TO DRAWINGS

1. Replace Sheet E258 with revised attached Sheet E258.

a. Corrected typo of gate pay item.

b. Corrected typo of gate detail sheet

c. Corrected typo of gate operator model.

2. Replace Sheet E259 with revised attached Sheet E259.

a. Revised access control card reader/keypad callout.

C. ADDITIONAL BIDDER QUESTIONS

Q1: I need to know the brand and model numbers of the gate operator and access readers they are wanting.

Is it stated anywhere?

R1: Gate operator shall be Hysecurity Model #222SS ST or approved equivalent as shown in Detail 1 on Sheet E256 (There is a typo on Sheet E258, Sheet says #22SS, gate operator callout shall read #222SS). Contractor shall coordinate new sliding gate selection with gate operator prior to ordering any equipment.

The existing card reader/key pad is by hid global. Access control card reader/key pad shall be by hid global or approved equivalent and shall be compatible with existing control cabinet equipment and airport access control system.

13750 San Pedro Ave

Suite 300

San Antonio, TX 78232

O 210-224-2800

F 210-545-3103

rsandh.com

LAREDO INTERNATIONAL AIRPORT ADDENDUM NO. 3 CARGO APRON PHASE 14 REHABILITATION June 25, 2020 Page 2 of 2

D. ATTACHMENTS

1. G-210-2

2. Plan Sheet E258

3. Plan Sheet E259

ADDENDUM NO. 3 ISSUED BY:

RS&H, INC.

END OF ADDENDUM NO. 3

RS&H

City of Laredo Gate Access Equipment

Laredo International Airport G-210-2 June 25, 2020

Cargo Apron Phase 14 Rehabilitation Addendum No. 3

include all of the equipment and connections shown on the drawings.

3. Cable: Unless noted otherwise, conductor sizes are based on a 75°C, THWN-2, 600 volt insulation,

copper conductors, not more than three single insulated conductors, in raceway, in free air. The

conduit/duct sizes are based on the use of THWN-2, 600 volt insulated conductors. The Contractor

shall make the necessary increase in conduit/duct sizes for other types of wire insulation. In no case

shall the conduit/duct size be reduced. The minimum power circuit wire size shall be #12 AWG.

Conductor sizes may have been adjusted due to voltage drop or other engineering considerations.

Equipment provided by the Contractor shall be capable of accepting the quantity and sizes of

conductors shown in the Contract Documents. All conductors, pigtails, cable step-down adapters, cable

step-up adapters, terminal blocks and splicing materials necessary to complete the cable

termination/splice shall be considered incidental. Cable type, size, number of conductors, strand and

service voltage shall be as specified in the Contract Documents.

4. Steel Conduit: Rigid galvanized steel (RGS) conduit and fittings shall be hot dipped galvanized inside

and out and conform to the requirements of Underwriters Laboratories Standards 6, 514B, and 1242.

All RGS conduits or RGS elbows installed below grade, in concrete, permanently wet locations or other

similar environments shall be painted with a 10 mil thick coat of asphaltum sealer or shall have a factory

bonded polyvinyl chloride (PVC) cover. Any exposed galvanizing or steel shall be coated with 10 mil

of asphaltum sealer. When using PVC coated RGS conduit, care shall be exercised not to damage the

factory PVC coating. Damaged PVC coating shall be repaired per the manufacturer's written

instructions.

5. Plastic Conduit: Plastic conduit and fittings shall conform to the requirements of Underwriters

Laboratories Standards 514 and 651 and Article 352 of the current National Electrical Code. The type

of solvent cement shall be as recommended by the conduit/fitting manufacturer.

6. Concrete: Concrete shall conform to FAA Specification P-610.

7. Vehicle Access Gate: Shall meet the requirements shown in the plans. Materials shall be in accordance

with ASTM F1184 Type II Class 2 and FAA Specification F-162 Section 162-2.4.

8. Card Reader/Keypad: Manufactured by HID Global or approved equal. Card Reader/Keypad shall be

compatible with existing control cabinet equipment and airport access control system.

9. Bollards: Bollards shall meet the requirements shown in the plans and conform to TxDOT Item 5084.

SEQUENCE OF OPERATION

210-4.1 Vehicle Access Gate: To enter or exit, a security card is swiped on the keypad then a security

code is punched on the keypad. The gate operator verifies if the code is valid or invalid associated with the

security card. If the code is valid, the gate is opened. After the vehicle clears the safety loop inside the

gate, time delay is activated and the gate closes after time expires. For vehicular safety, the gate shall not

be allowed to close until after a vehicle has passed over and beyond a safety loop detector.

1

25' - 0"

4' - 0" 4' - 0"

25' - 0"

4' - 0"

4' - 0"

REPLACE GATE OPERATOR IN KIND WITH NEW GATE OPERATOR BY

HYSECURITY MODEL #222SS ST OR APPROVED EQUIVALENT.

COORDINATE ALL MOUNTING AND CONDUIT REQUIREMENTS WITH

MANUFACTURER'S INSTALLATION INSTRUCTIONS.

CONTRACTOR SHALL PROVIDE SUBMITTAL SHOWING GATE OPERATOR

FOUNDATION DESIGN AND LAYOUT DRAWING OF ALL CONDUIT

REQUIREMENTS IN ACCORDANCE WITH MANUFACTURER'S INSTALLATION

INSTRUCTIONS. POWER WILL COME FROM EXISTING SINGLE PHASE

120/240 VOLT POWER PANEL SHOWN ON THIS SHEET.

CONTRACTOR SHALL COORDINATE SLIDING GATE SELECTION WITH GATE

OPERATOR PRIOR TO ORDERING ANY EQUIPMENT.

SE

CU

RE

S

ID

E

PU

BL

IC

S

ID

E

SAW CUT FOR SAFETY LOOP TYP, LENGTH

AS REQUIRED DEPENDENT UPON OPENING

WIDTH, PLACEMENT OF SAFETY LOOPS IS

SYMMETRICAL ABOUT FENCE CENTERLINE.

SEE DETAIL ON SHEET E259 FOR

ADDITIONAL INFORMATION

ENTRANCE CARD READER OR

KEYPAD, SEE DETAIL ON

SHEET E259 FOR ADDITIONAL

INFORMATION, TYP

GATE, SEE CIVIL DRAWINGS FOR ADDITIONAL

INFORMATION, COORDINATE GATE OPERATOR

INSTALLATION WITH SLIDING GATE

MANUFACTURER'S SHOP DRAWINGS

SCALE:

VEHICLE SECURITY GATE LAYOUT DETAIL

N.T.S

1

E258

EXIT CARD READER OR KEYPAD,

SEE DETAIL ON SHEET E259 FOR

ADDITIONAL INFORMATION, TYP

EXISTING CONTROL EQUIPMENT

CABINET AND POWER PANEL

MOUNTED ON EXISTING UTILITY POLE

3/4" PVC CONDUIT WITH CONTROL CABLE

FROM CARD READER/KEYPAD TO EXISTING

CONTROL CABINET. CONDUIT IS SHOWN

ROUTED ORTHOGONALLY FOR GRAPHICAL

CLARITY PURPOSES ONLY, CONTRACTOR

SHALL INSTALL CONDUIT VIA MOST DIRECT

ROUTE. ALL CONDUIT UNDER PAVEMENT

SHALL BE CONCRETE ENCASED.

ALL ITEMS ON THIS SHEET ARE PART OF THE G-210-7.1 PAY ITEM (VEHICLE ACCESS

GATE, COMPLETE).

THE GATE OPERATOR CONTROL CABINET AND POWER PANEL SHALL REMAIN. THE GATE

OPERATOR SHALL BE REPLACED IN KIND, NEW ENTRANCE AND EXIT CARD

READERS/KEYPADS SHALL BE INSTALLED, AND NEW CONDUIT AS REQUIRED BY GATE

OPERATOR MANUFACTURER'S INSTALLATION INSTRUCTIONS SHALL BE INSTALLED.

BOLLARDS ON THIS SHEET ONLY ARE PART OF THE ABOVE REFERENCED PAY ITEM. SEE

SHEET C252 FOR GATE DETAILS.

CONTRACTOR SHALL COORDINATE COUNDUIT CONNECTIONS SHOWN HERE WITH

MANUFACTURER'S INSTALLATION INSTRUCTIONS.

3/4" PVC CONDUIT WITH CONTROL CABLE

FROM CARD READER/KEYPAD TO EXISTING

CONTROL CABINET. CONDUIT IS SHOWN

ROUTED ORTHOGONALLY FOR GRAPHICAL

CLARITY PURPOSES ONLY, CONTRACTOR

SHALL INSTALL CONDUIT VIA MOST DIRECT

ROUTE. ALL CONDUIT UNDER PAVEMENT

SHALL BE CONCRETE ENCASED.

3/4" PVC CONDUIT MIN WITH CONDUCTORS

FOR GATE OPERATOR SIZED PER NEC.

ALL CONDUIT UNDER PAVEMENT SHALL BE

CONCRETE ENCASED.

3/4" PVC CONDUIT TYP WITH SAFETY LOOP

CONDUCTORS TO GATE OPERATOR, PROVIDE

WATER TIGHT SEAL AROUND CONDUCTORS AT

CONDUIT ENTRANCE, COORDINATE CONDUIT

REQUIREMENTS AND ROUTING WITH

MANUFACTURER'S INSTALLATION INSTRUCTIONS.

GATE OPERATION NOTES

ENTRANCE/EXIT:

GATE IS SIGNALED TO OPEN AS A RESULT OF THE FOLLOWING EVENTS:

1. VALID CARD IS PRESENTED AT CARD READER AND VALID USER

ACCESS PIN INPUT INTO KEYPAD. AS THE VEHICLE PROCEEDS

THROUGH THE OPENING, BREAKING THE INFRARED PHOTO

SAFETY BEAM, AN IMPULSE IS TRANSMITTED TO HOLD THE GATE

IN AN OPEN POSITION. WHEN THE LOOPS AND INFRARED BEAM

HAVE BEEN CLEARED, THE GATE OPERATOR CLOSES THE GATE.

ELECTRICAL

DETAILS

(SHEET 8 OF 9)

E258

AIRPORT

2020 RS&H, INC.

5210 BOB BULLOCK LOOP

LAREDO

CONSULTANTS

SHEET NUMBER

REVISIONS

DATE ISSUED:

REVIEWED BY:

DRAWN BY:

RS&H PROJECT NUMBER

SHEET TITLE

DESIGNED BY:

DESCRIPTIONNO. DATE

CARGO APRON

Drawing: C:\pw_work\rsh_pw\pw_user\d0281336\E301.dwg Plotted by: Lopez, AnaPlotted on: 6/25/2020 8:22 AM

13750 San Pedro, Suite 300

San Antonio, Texas 78232

210-224-2800 FAX 210-545-3103

RS&H, Inc.

www.rsandh.com

PHASE 14

INTERNATIONAL

LAREDO, TX 78041

REHABILITATION

05-29-2020

223-0066-000

BID DOCUMENTS

Texas Registration No. F-3401

CAT

JEJ

JEJ

1 ADDENDUM 3 6/25/20

1

1

1

VEHICLE SECURITY GATE ELECTRICAL NOTES

1. UNLESS OTHERWISE NOTED, ALL CONDUIT ABOVE GROUND SHALL BE RIGID

GALVANIZED STEEL, ALL CONDUIT BELOW GROUND SHALL BE SCHEDULE 40 PVC.

2. ALL STEEL CONDUITS, FITTINGS, NUTS, BOLTS, ETC. SHALL BE GALVANIZED.

3. UNLESS OTHERWISE SHOWN, ALL EXPOSED CONDUITS SHALL BE RUN PARALLEL

TO OR AT RIGHT ANGLES WITH THE LINES OF THE STRUCTURE.

4. TAG BOTH ENDS OF ALL CONTROL CONDUCTORS TO IDENTIFY TERMINAL NUMBER

AND CIRCUIT.

5. ALL POWER AND CONTROL CIRCUIT CONDUCTORS SHALL BE COPPER; ALUMINUM

SHALL NOT BE ACCEPTED. THIS INCLUDES WIRE, CABLE, BUSSES, TERMINALS,

SWITCH/PANEL COMPONENTS, ETC.

6. UNDERGROUND POWER SUPPLY WIRING SHALL BE IN PVC CONDUIT AT LEAST 24

INCHES DEEP.

GATE OPERATION NOTES

ENTRANCE/EXIT:

GATE IS SIGNALED TO OPEN AS A RESULT OF THE FOLLOWING EVENTS:

1. VALID CARD IS PRESENTED AT CARD READER AND VALID USER

ACCESS PIN INPUT INTO KEYPAD. AS THE VEHICLE PROCEEDS

THROUGH THE OPENING, BREAKING THE INFRARED PHOTO

SAFETY BEAM, AN IMPULSE IS TRANSMITTED TO HOLD THE GATE

IN AN OPEN POSITION. WHEN THE LOOPS AND INFRARED BEAM

HAVE BEEN CLEARED, THE GATE OPERATOR CLOSES THE GATE.

SAFETY LOOP DETECTOR NOTES

1. THE FOLLOWING CHART MUST BE UTILIZED WHEN INSTALLING A LOOP

USED FOR VEHICLE DETECTION. THIS CHART LISTS THE PREDETERMINED

NUMBER OF TURNS THAT MUST BE MADE BY THE ACTUAL LOOP WIRES IN

ORDER TO CREATE AN ACCEPTABLE INDUCTANCE RANGE.

2. DUE TO THE LOSS OF INDUCTANCE CAUSED BY A DISTANCE GREATER

THAN 490 FEET FROM THE LOOP TO THE GATE DEVICE, AN ADDITIONAL

TURN OF LOOP WIRE IS RECOMMENDED DURING INSTALLATION.

3. A CLEAN, SMOOTH SAW SLOT MUST BE CUT INTO THE PAVEMENT WHERE

THE LOOP IS TO BE INSTALLED. THE INDUSTRY STANDARD REQUIRES THIS

SLOT TO BE A MINIMUM OF 1.50'' AND A MAXIMUM OF 3.50'' DEEP AS A

GENERAL RULE. WHEN A SOFTER PAVEMENT MATERIAL IS PRESENT, THE

GREATER SAW CUT DEPTH IS PREFERRED. THIS PROTECTS THE LOOP

WIRES FOR A LONGER PERIOD OF TIME.

4. AFTER THE LOOP SAW SLOTS HAVE BEEN CLEARED OUT, PROCEED TO

TUCK THE WIRE IN THE SLOTS WITH AN OBJECT THAT WILL NOT INJURE

THE WIRE INSULATION. WIND THE ACTUAL LOOP WITH #14 THHN

STRANDED WIRE OR EQUIVALENT. THE WIRE MUST BE RATED FOR DIRECT

BURIAL AND IMPERVIOUS TO MOISTURE. THIS WILL AVOID CHANGES IN THE

DIELECTRIC CONSTANT OF THE WIRE INSULATION WHICH MAY CAUSE

EXCESSIVE INDUCTANCE DRIFT. IT IS EXTREMELY IMPORTANT THAT THE

LOOP BE WOUND WITH ONE CONTINUOUS LENGTH OF WIRE. SPLICES ARE

NOT PERMITTED.

5. THE TWO WIRES THAT LEAVE THE LOOP AT THE CURB OR PAVEMENT

AFTER THE LOOP HAS BEEN PROPERLY WOUND, MUST BE TWISTED AT A

MINIMUM OF 5 TURNS PER FOOT AND TAPED TOGETHER WITH (UL)

APPROVED ELECTRICAL TAPE TO PREVENT THE WIRES FROM MOVING.

FAILURE TO TWIST AND SECURE THESE WIRES MAY PRODUCE A FALSE

SIGNAL FROM THE LOOP.

6. WHEN THE LOOP INSTALLATION HAS BEEN COMPLETED, CHOOSE A

SEALANT THAT CLOSELY MATCHES THE TYPE OF PAVEMENT MATERIAL

PRESENT. INDUSTRY RECOMMENDS (3M) LOOP DETECTOR SEALANT. HARD

SETTING EPOXIES SHOULD NOT BE USED WITH ASPHALT. AVOID HIGH

TEMPERATURE SEALANTS.

7. VEHICLE DETECTION LOOPS SHALL BE TWO PER GATE AND BE

CONFIGURED FOR SAFETY ONLY. ALL LOOPS SHALL BE INSTALLED TO

MANUFACTURERS SPECIFICATIONS AND FIELD LOCATED BY CONTRACTOR

AND ENGINEER. LOOPS SHALL BE SAWCUT INTO SOUND PAVEMENT.

WHERE PAVEMENT IS CRACKED, BROKEN OR OTHERWISE UNSOUND,

LOOPS SHALL BE INSTALLED IN SCHEDULE 80 PVC AND LOCATED IN THE

GRANULAR BASE PRIOR TO NEW PAVING BY OTHERS.

LOOP AREA

A) 6 - 12

B) 12 - 20

C) 20 - 60

D) 60 - 240

E) 240 & UP

NUMBER OF TURNS

6

5

4

3

2

LOOP DIMENSION

A) 2' X 6'

B) 2'-6'' X 6'

C) 4' X 8'

D) 6' X 9'

E) 12' X 20'

SCALE:

VEHICLE SECURITY GATE CARD READER/KEYPAD DETAIL

N.T.S

1

E259

1" CHAMFER AROUND

PERIMETER OF FOUNDATION

BOLLARD BEYOND

SEE CIVIL DRAWING FOR ISOLATION JOINT DETAIL

BETWEEN PAVEMENT AND CARD READER/KEYPAD

FOUNDATION

3/4" PVC CONDUIT WITH CARD

READER/KEY PAD CABLE TO

VEHICLE SECURITY GATE

CONTROL EQUIPMENT RACK

#6 BARE COPPER GROUND IN 3/4"

PVC CONDUIT FROM GROUND LUG

CLAMP ON GOOSE NECK STRUCTURE

TO GROUND ROD, EXOTHERMIC

WELD TO GROUND ROD

3/4" x 10' COPPER-CLAD STEEL

GROUND ROD, 12" MIN BELOW GRADE

6" BASE OF #57

CRUSHED AGGREGATE

BOLLARD AND GOOSENECK

CONCRETE FOUNDATION

DOUBLE GOOSENECK, MOUNT TO FOUNDATION PER

MANUFACTURER'S INSTALLATIONS INSTRUCTIONS

3' - 0"

6' - 0"

2' - 0"

2' - 6"

4' - 0"

6"

1' - 6"

1' - 0"

2' - 6"

3' - 0" 1' - 0"

6' - 0"

3' - 0"

2' - 0"

PLAN VIEW

2' - 6"

FRONT VIEW SIDE VIEW

ACCESS CONTROL CARD READER/KEY

PAD BY HID GLOBAL OR APPROVED

EQUIVALENT. CARD READER/KEY PAD

SHALL BE COMPATIBLE WITH EXISTING

CONTROL CABINET EQUIPMENT AND

AIRPORT ACCESS CONTROL SYSTEM

(NOTE - EXISTING CARD READER/KEY

PAD IN THIS AREA IS BY HID GLOBAL).

BOLLARD MADE OF 6" DIAMETER STEEL

CAPPED STEEL PIPE FILLED WITH

CONCRETE, PAINT WITH 2 COATS OF

YELLOW ENAMEL, COORDINATE COLOR

WITH OWNER. BOTTOM OF PIPE SHALL

BE 3" ABOVE BOTTOM OF FOUNDATION

BOLLARD CARD READER

KEYPAD

SAFETY LOOP OF #14 AWG THHN

OR APPROVED EQUIVALENT, SEE

SAFETY LOOP NOTES THIS SHEET

FOR ADDITIONAL INFORMATION

SCALE:

VEHICLE SECURITY GATE SAFETY LOOP DETECTOR DETAIL

N.T.S

2

E259

SEE SAFETY LOOP NOTES THIS

SHEET FOR QUANTITY OF

LOOPS REQUIRED

LOOP SAW CUT IN PAVEMENT

LOOP LEAD-IN WIRES

INCOMING LEAD-IN WIRES

FROM SECURITY GATE

CONTROL EQUIPMENT RACK

5' - 0"

FULL STRENGTH PAVEMENT,

SEE CIVIL DRAWINGS

SEE CIVIL DRAWING FOR ISOLATION

JOINT DETAIL BETWEEN PAVEMENT

AND CARD READER/KEYPAD

FOUNDATION

ELECTRICAL

DETAILS

(SHEET 9 OF 9)

E259

AIRPORT

2020 RS&H, INC.

5210 BOB BULLOCK LOOP

LAREDO

CONSULTANTS

SHEET NUMBER

REVISIONS

DATE ISSUED:

REVIEWED BY:

DRAWN BY:

RS&H PROJECT NUMBER

SHEET TITLE

DESIGNED BY:

DESCRIPTIONNO. DATE

CARGO APRON

Drawing: C:\pw_work\rsh_pw\pw_user\d0281336\E301.dwg Plotted by: Lopez, AnaPlotted on: 6/25/2020 8:18 AM

13750 San Pedro, Suite 300

San Antonio, Texas 78232

210-224-2800 FAX 210-545-3103

RS&H, Inc.

www.rsandh.com

PHASE 14

INTERNATIONAL

LAREDO, TX 78041

REHABILITATION

05-29-2020

223-0066-000

BID DOCUMENTS

Texas Registration No. F-3401

CAT

JEJ

JEJ

1 ADDENDUM 3 6/25/20

1