26.030 - 911 EOC - Structural 2026-05-28.pdf

PDF 521 KB Posted Sep 16, 2026

Attached to: ITB 27-16TM Structural Repairs to 100 Exploration WAy
Solicitation number: IFB-125868
Issued by: Buena Vista City, Virginia

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Written by GovTribe AI · Sep 18, 2026

Structural Modifications to 911 Emergency Operations Center

This is a structural design document prepared for the City of Hampton, Virginia, detailing required modifications to reinforce the existing 911 Emergency Operations Center located at 100 Exploration Way, Hampton, VA 23666. The project involves structural reinforcement of the existing building to meet Risk Category IV classification standards in accordance with the 2021 International Building Code and Virginia Uniform Statewide Building Code effective January 18, 2024. The primary work consists of reinforcing fourteen existing HSS8x8 diagonal braces throughout the structure using steel plates welded to all four sides of each brace. The building features three floors plus a roof level, with finished first floor elevation at 0'-0", second floor steel at 13'-6", third floor steel at 26'-10", and roof steel at 41'-9". The scope of work includes field verification of vertical brace lengths, installation of 1/4-inch thick continuous steel reinforcing plates, and complete joint penetration welds between plate sections. All structural steel must comply with AISC 360-16 specifications and be fabricated from new ASTM A36 steel, with welding performed to AWS D1.1 standards using E70XX electrodes. Third-party visual inspection by a testing agency hired by the owner is required for all steel plate installations and welds.

The design incorporates specific load criteria including a ground snow load of 10 PSF with a resulting flat roof snow load of 15.6 PSF, ultimate wind speed of 131 MPH (nominal 101.5 MPH) for Risk Category IV exposure, and seismic design parameters with importance factor of 1.5 and design base shear of 0.070W using ordinary concentrically braced frames with a response modification factor of 3.25. The contractor bears full responsibility for field measurements, shop drawing submissions, dimensional verification, job site safety, and protection of existing building elements. Prior to commencing work, the general contractor must become familiar with existing building construction and coordinate with the owner regarding removal of finishes, partitions, and building systems necessary to access members for reinforcement. Upon completion of reinforcement and inspection, the contractor is responsible for reconstruction and repair of all removed building elements. The document establishes that contractors must submit shop drawings for approval before fabrication and accept complete responsibility for the accuracy and correctness of all dimensional work in accordance with generally accepted construction practices.

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Other files

File	Type	Posted
ITB 27-16TM Exploration Way.pdf	PDF	Sep 16, 2026
ITB 27-16TM Addendum 1.pdf	PDF	Sep 16, 2026
Mandatory Pre0Bid ITB 27-16TM.pdf	PDF	Sep 16, 2026
Statement and Schedule of Special Inspections.pdf	PDF	Sep 16, 2026

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1 2 3 4 5 6 7 8 9 10

S201

(TYP)

33 3

(TYP)(TYP)

(TYP)

(TYP)(TYP)(TYP)(TYP)

(TYP)

(-0'-8")(-0'-8")(-4'-8")(-0'-8")(-0'-8")

(-0'-8")

(-4'-8") (-0'-8") (-0'-8")

(-2'-0")(-2'-0")(-2'-0")(-2'-0")

± 20' - 0" ± 20' - 0" ± 20' - 0" ± 20' - 0" ± 20' - 0" ± 20' - 0" ± 20' - 0" ± 20' - 0" ± 20' - 0"

A. DATUM FOR ALL ELEVATIONS GIVEN ON THIS PLAN IS

EXISTING FINISHED FIRST FLOOR ELEVATION = 0’-0”.

B. TOP OF EXISTING FIRST FLOOR IS AT +0’-0”.

C. TOP OF EXISTING FOOTING ELEVATIONS ARE -1'-4"

BELOW FINISHED FIRST FLOOR UNLESS NOTED THUS

(-____) ON PLAN PER ORIGINAL DRAWINGS DATED

JUNE 1, 2004.

D. THE EXISTING FIRST FLOOR IS A 4" SLAB-ON-GRADE

REINFORCED WITH WELDED-WIRE-FABRIC PER THE

ORIGINAL BUILDING DRAWINGS.

E. FOR GENERAL NOTES REFER TO THIS SHEET.

FACE OF EXISTING BUILDING.

EXISTING 10" WIDE FLANGE COLUMN.

EXISTING WALL FOOTING.

EXISTING COLUMN FOOTING.

EXISTING GRADE BEAM.

LOCATION OF VERTICALLY BRACED BAY. FOR

DETAILS AND MEMBERS TO BE REINFORCED

REFER TO FRAMING ELEVATIONS ON SHEET S201.

14 TOTAL DIAGONAL BRACES TO BE REINFORCED.

DRAWN BY:

CHECKED BY:

DATE:

JOB NUMBER:

5/28/2026

S101

E X

F O

U N

D A

N P

L A

S T

R U

C T

U R

A L M

O D

A T

S T

E M

E R

G E

N C

Y O

P E

R A

N S

C E

N T

E R

DFS

05/28/2026

26.030

KBF

X P

L O

R A

N W

A Y

A M

P T

O N

1/8" = 1'-0"

EXISTING FOUNDATION PLAN

4'0 8' 16'

SCALE: 1/8"=1'-0"

SHEET NOTES:

SHEET KEYNOTES:

GENERAL:

1. ALL WORK MUST COMPLY WITH THE CODES LISTED BELOW AND IN THE

SPECIFICATIONS.

2. THE NEW WORK SHOWN ON THESE PLANS ILLUSTRATE THE

REQUIREMENTS TO REINFORCE THE EXISTING STRUCTURE TO A RISK

CATEGORY IV STRUCTURE IN ACCORDANCE WITH THE PROVISIONS OF

THE INTERNATIONAL BUILDING CODE, 2021 EDITION, AS ADOPTED BY THE

VIRGINIA UNIFORM STATEWIDE BUILDING CODE, 2021 EDITION,

EFFECTIVE JANUARY 18, 2024.

3. THE CONTRACTOR IS RESPONSIBLE FOR DIMENSIONS, ELEVATIONS,

ETC., NECESSARY FOR THE PROPER CONSTRUCTION AND ALIGNMENT OF

THE NEW STRUCTURAL ELEMENTS TO THE EXISTING STRUCTURE. MAKE

ALL MEASUREMENTS NECESSARY PRIOR TO THE FABRICATION AND

ERECTION OF STRUCTURAL MEMBERS.

4. BEFORE PROCEEDING WITH ANY WORK WITHIN THE EXISTING

STRUCTURE, BECOME FAMILIAR WITH STRUCTURAL CONDITIONS OF THE

EXISTING STRUCTURE. IT IS THE CONTRACTOR'S RESPONSIBILITY TO

PROVIDE ALL NECESSARY SAFEGUARDS, TO MAINTAIN ALL PARTS OF

THE STRUCTURE IN A SAFE CONDITION AT ALL TIMES DURING THE

PROCESS OF CONSTRUCTION AND TO PROTECT FROM DAMAGE THOSE

PORTIONS OF THE EXISTING BUILDING WHICH ARE TO REMAIN.

GENERAL (CONT'D):

5. SUBMIT SHOP DRAWINGS FOR APPROVAL BEFORE PROCEEDING WITH THE

WORK. THE CONTRACTOR MUST CHECK ALL DIMENSIONS AND ACCEPT FULL

RESPONSIBILITY FOR DIMENSIONAL CORRECTNESS.

6. UNDER NO CIRCUMSTANCES CAN THE REPRODUCTION OF CONTRACT

DRAWINGS BE USED AS SHOP DRAWINGS.

7. IN ACCORDANCE WITH GENERALLY ACCEPTED CONSTRUCTION PRACTICES,

CONTRACTOR WILL BE SOLELY AND COMPLETELY RESPONSIBLE FOR

CONDITION OF JOB SITE INCLUDING SAFETY OF ALL PERSONS AND PROPERTY

DURING PERFORMANCE OF THE WORK.

8. TYPICAL DETAILS AND GENERAL NOTES APPLY TO ALL PARTS OF THE JOB

EXCEPT WHERE SPECIFICALLY DETAILED OR NOTED OTHERWISE.

9. INFORM THE PROFESSIONAL OF RECORD IN WRITING OF ANY DEVIATION

FROM THE CONTRACT DOCUMENTS. THE CONTRACTOR IS NOT RELIEVED OF

THE RESPONSIBILITY OF SUCH DEVIATION BY THE PROFESSIONAL OF RECORD

REVIEW OF SHOP DRAWINGS, PRODUCT DATA, ETC. UNLESS THE

CONTRACTOR HAS SPECIFICALLY INFORMED THE PROFESSIONAL OF RECORD

OF SUCH DEVIATION AT THE TIME OF SUBMISSION, AND THE PROFESSIONAL

OF RECORD HAS GIVEN WRITTEN APPROVAL TO THE SPECIFIC DEVIATION.

DESIGN CRITERIA:

1. ROOF SNOW LOADS:

GROUND SNOW LOAD Pg = 10 PSF (PER FIGURE 1608.2 OF VCC) SNOW EXPOSURE FACTOR Ce = 0.9

SNOW LOAD IMPORTANCE FACTOR I =1.0

THERMAL FACTOR Ct=1.025 FLAT ROOF SNOW LOAD: Pf = 15.6 PSF

RAIN ON SNOW SURCHARGE LOAD= 0 PSF

2. WIND LOADS:

RISK CATEGORY = IV

ULTIMATE WIND SPEED = 131 MPH

NOMINAL WIND SPEED (ASD) = 101.5 MPH

EXPOSURE CATEGORY (MAIN WINDFORCE-RESISTING SYSTEM): C

EXPOSURE CATEGORY (COMPONENTS AND CLADDING): C

INTERNAL PRESSURE COEFFICIENT: +/- 0.18 (ENCLOSED)

DESIGN CRITERIA (CONT'D):

3. SEISMIC LOADS:

RISK CATEGORY IV

IMPORTANCE FACTOR I = 1.5

Ss = .10g S1 = .04g

SOIL SITE CLASS E

Sds = 0.152 Sd1 = 0.114

SEISMIC DESIGN CATEGORY: C

BASIC SEISMIC FORCE RESISTING SYSTEM:

STEEL ORDINARY CONCENTRICALLY BRACED FRAMES

RESPONSE MODIFICATION FACTOR, R=3.25

SEISMIC RESPONSE COEFFICIENT, Cs = 0.070

DESIGN BASE SHEAR: 0.070W

ANALYSIS PROCEDURE USED: EQUIVALENT LATERAL FORCE

STRUCTURAL STEEL:

1. STRUCTURAL STEEL MUST COMPLY WITH

THE AMERICAN INSTITUTE OF STEEL

CONSTRUCTION (AISC 360-16)

“SPECIFICATION FOR STRUCTURAL STEEL

BUILDINGS”.

2. STRUCTURAL STEEL MUST BE NEW,

CLEAN, AND STRAIGHT, AND CONFORM

TO THE FOLLOWING:

A. STEEL PLATES - ASTM A36, UNLESS

OTHERWISE NOTED

3. WELDING MUST COMPLY WITH THE

"STRUCTURAL WELDING CODE - STEEL"

(AWS D1.1). WELD ELECTRODES MUST BE

E70XX.UNLESS OTHERWISE NOTED,

MINIMUM WELD SIZE MUST BE 3/16"

CONTINUOUS FILLET WELDS.

4. STEEL PLATE INSTALLATION AND WELDS

MUST BE VISUALLY INSPECTED BY THIRD

PARTY TESTING AGENCY, HIRED BY

OWNER.

GENERAL NOTES

NOTE:

PRIOR TO ANY WORK, GENERAL CONTRACTOR WILL

BECOME FAMILIAR WITH THE EXISTING BUILDINGS

CONSTRUCTION AND FINISHES, PARTITIONS, AND

OTHER SYSTEMS THAT MUST BE REMOVED TO

ACCESS THE MEMBERS IN ORDER TO REINFORCE

THE MEMBERS AS SHOWN ON THESE PLANS. THE

OWNER WILL PROVIDE DIRECTION TO THE GENERAL

CONTRACTOR FOR REMOVAL OF EXISTING

FINISHES, PARTITIONS AND SYSTEMS. ONCE THE

REINFORCING OF THE MEMBERS IS COMPLETE AND

INSPECTED; THE GENERAL CONTRACTOR WILL

RECONSTRUCT/REPAIR THE BUILDING ELEMENTS

THAT WERE REMOVED PER THE OWNERS

DIRECTION.

REVISIONS

NO. DATE COMMENTS

FINISHED

EXISTING FIRST

FLOOR

0' - 0"

TOP OF STEEL AT

SECOND FLOOR

13' - 6"

TOP OF STEEL AT

THIRD FLOOR

26' - 10"

3 4

TOP OF STEEL AT

ROOF

41' - 9"

S201

EXISTING 3" CONCRETE

ON 3" METAL DECK

COMPOSITE SLAB, TYP

AT SECOND AND THIRD

FLOOR

4" SLAB-ON-GRADE,

(TYP)

GUSSET PLATE,

TYP EACH END OF

VERTICAL BRACE

±21'-0

±20'-0

±21'-0

REINFORCE EXISTING

HSS8x8 BRACE WITH STEEL

PLATES PER SECTION

1/S201

REINFORCE EXISTING HSS8x8

BRACE WITH STEEL PLATES

PER SECTION 1/S201

20' - 0"

CONTRACTOR TO FIELD VERIFY

LENGTH OF EACH VERTICAL

BRACE AND PROVIDE STEEL

REINFORCING PLATE BETWEEN

GUSSET PLATES, TYP

EXISTING WIDE

FLANGE BEAMS,

TYP

FINISHED

EXISTING FIRST

FLOOR

0' - 0"

TOP OF STEEL AT

SECOND FLOOR

13' - 6"

TOP OF STEEL AT

THIRD FLOOR

26' - 10"

TOP OF STEEL AT

ROOF

41' - 9"

S201

±28'-0

±27'-0"

±29'-0"

CONTRACTOR TO FIELD VERIFY

LENGTH OF EACH VERTICAL

BRACE AND PROVIDE STEEL

REINFORCING PLATE BETWEEN

GUSSET PLATES, TYP

EXISTING WIDE

FLANGE BEAMS,

TYP

REINFORCE EXISTING HSS8x8

BRACE WITH STEEL PLATES

PER SECTION 1/S201

EXISTING 3" CONCRETE

ON 3" METAL DECK

COMPOSITE SLAB, TYP

AT SECOND AND THIRD

FLOOR

30' - 0"

4" SLAB-ON-GRADE,

(TYP)

EXISTING HSS8x8

BRACE, DO NOT

REINFORCE

GUSSET PLATE,

TYP EACH END OF

VERTICAL BRACE

FINISHED

EXISTING FIRST

FLOOR

0' - 0"

TOP OF STEEL AT

SECOND FLOOR

13' - 6"

TOP OF STEEL AT

THIRD FLOOR

26' - 10"

TOP OF STEEL AT

ROOF

41' - 9"

S201

±21'-0"

±20'-0"

±21'-0"

CONTRACTOR TO FIELD VERIFY

LENGTH OF EACH VERTICAL

BRACE AND PROVIDE STEEL

REINFORCING PLATE BETWEEN

GUSSET PLATES, TYP

EXISTING WIDE

FLANGE BEAMS,

TYP

REINFORCE EXISTING

HSS8x8 BRACE WITH STEEL

PLATES PER SECTION 1/S201

REINFORCE EXISTING

HSS8x8 BRACE WITH STEEL

PLATES PER SECTION

1/S201

EXISTING 3" CONCRETE

ON 3" METAL DECK

COMPOSITE SLAB, TYP

AT SECOND AND THIRD

FLOOR

20' - 0"

4" SLAB-ON-GRADE,

(TYP)

GUSSET PLATE,

TYP EACH END OF

VERTICAL BRACE

EXISTING HSS8x8x1/4

BRACE

1/4" THICK x 7" WIDE CONTINUOUS STEEL

PLATE (TYP) WELDED TO ALL 4 SIDES OF

EXISTING BRACE. PLATE CAN BE SEPARATE

SECTIONS WITH A COMPLETE JOINT

PENETRATION (CJP) WELD BETWEEN

SECTIONS TO BE CONTINUOUS. PLATES MUST

EXTEND FROM GUSSET PLATE TO GUSSET

PLATE.

3/16 2"

EVERY 8",

TYP AT EACH

PLATE

E Q

EQ EQ

CENTERLINE

OF HSS

DRAWN BY:

CHECKED BY:

DATE:

JOB NUMBER:

5/28/2026

S201

E L E

V A

N S

S T

R U

C T

U R

A L M

O D

A T

S T

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E R

G E

N C

Y O

P E

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C E

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DFS

05/28/2026

26.030

KBF

X P

L O

R A

N W

A Y

A M

P T

O N

1/4" = 1'-0"S101

A ELEVATION

1/4" = 1'-0"S101

B ELEVATION

1/4" = 1'-0"S101

C ELEVATION

1 1/2" = 1'-0"S201

1 SECTION

0 1' 2'

SCALE: 1-1/2"=1'-0"

0 2' 4' 8'

SCALE: 1/4"=1'-0"

7 6 6 7

REVISIONS

NO. DATE COMMENTS

Sheets

S101 - EXISTING FOUNDATION PLAN

S201 - ELEVATIONS

File details come from the government source that posted it. Updated Sep 18, 2026.