250654_(Sign_Engineering)_Rigdon_Center_-_Ft_Walton_Bch,_FL.pdf
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- Solicitation number
- ITB TDD 61-26
- Issued by
- Okaloosa County, Fruitville CDP, Florida
About this file
This is a structural engineering design document prepared by Mark Disosway, Professional Engineer (Florida License 53915), for the Destin-Fort Walton Beach Tourism Development Division, a Department of Okaloosa County, for monument sign support structures at the Rigdon Center located at 1958 Lewis Turner Boulevard, Fort Walton Beach, Florida 32547. The engineering design addresses the structural requirements for two 16" x 16" x 0.375" wall A500 46 ksi HSS steel columns spaced 184 inches on center, designed to support a monument sign cabinet and withstand wind loads per Florida Building Code 8th Edition (2023), Section 1609, and ASCE 7-22 standards. The design encompasses three foundation options: drilled shaft foundations (48-inch diameter), cube foundations (8.9' cube), or spread foundations (22' wide x 10.5' long x 3.2' deep), all configured for 2500 psi concrete with appropriate embedment depths and reinforcement specifications. The sign is designed for a 170 mph ultimate wind speed, Risk Category III (Substantial Hazard), and Wind Exposure C conditions with a presumptive soil type of sand, silty sand, clayey sand, silty gravel, or clayey gravel with a bearing capacity of 2000 psf.
The engineering design is sealed and digitally signed by the professional engineer and is valid for one sign installation at the specified location. The scope of work is limited to the design of support columns and foundations only; the sign cabinet, electromagnetic compatibility (EMC) cross supports, attachment details, and attachment to support columns are the responsibility of the sign manufacturer and are not included in this engineering seal. All construction materials must comply with specified ASTM standards, including anchor bolts (ASTM F1554 Grade 36), structural steel (ASTM A-36 or A-500), concrete (2500 psi minimum), and rebar (ASTM 615 Grade 60 or 40). All welding must be performed by AWS-certified welders using AWS D1.1 (steel) or D1.2 (aluminum) standards. The sign owner, manufacturer, and installer are responsible for verifying that actual site conditions match the stated wind speed, exposure, topographic, and soil factors and for designing and constructing the sign cabinet and all other components in compliance with applicable building, fire, UL, and zoning codes.
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Florida
Florida;FBC 8th Ed (2023), Sect 1609 wind ;ref ASCE 7-22;FLPE53915; https://codes.iccsafe.org/content/FLBC2023P1/chapter-16-structural-design#FLBC2023P1_Ch16_Sec1609;Florida engineer seal requirement: Embossing seal or rubber stamp- size 1 7/8";
170 Wind Speed, Vult, mph, from ASCE 7-22, Figure 26.5 III Risk Category; I, Low; II, Normal; III, Substantial Hazard; IV, Essential/Critical C Wind Exposure; C, House size obstructions for > 600 ft; D, no obstructions > 5000 ft two_drilled_pylontwo_cube_pylontwo_spread_pylon 7-22 WIND LOAD CALC: ASCE 7-22 Section 29.3.1, Solid Freestanding Signs
Grade offset (ft)
A B C D E F Sign Segment ID OAH
20.7 1.0 Segment Top Above Grade, Top, ft 20.7
24.0 24.3 Segment Width, W, ft 24.0
19.7 1.0 Segment Height, H, ft 20.7
473.50 24.33 Segment Area, ft², adjusted for grade offset
0.91 0.85 Velocity Pressure Exposure Coeff; Kz
57.1 53.4 Velocity Pressure, qh,ult, psf (per segment)
1.45 1.30 Force Coefficient, Cf (per segment) 1.55
70.4 59.0 Wind Pressure, Pult, psf = Qh,ult*G*Cf,seg
42.3 35.4 Wind Pressure, Pasd, psf = Pult*0.6
20.0 0.9 Wind Force, Fseg, kips = Pasd*Areaseg
237.1 0.5 Wind Moment Mseg kip*ft = Fseg*(Topseg-0.45*Hseg)
192.802 0.387 Wind Mcol,seg = (Fseg/2+Fseg*0.2*Wseg/spacing)*centroid
15.3 ft OC Column Spacing "grade" = 0 ft 20.87 kip Total Shear at Grade, Vtot = Sum (Fseg)
11.38 237.6 kip*ft Total Moment at Grade, Mtot = Sum (Fseg * centroidseg)
16.97 kip Column Shear, Vcol = Vtot/2+Sum(Fseg*0.2*W)/Spacing
11.38 0.81 193.2 kip*ft Column Moment at Grade, Mcol = sum(Mcol,seg)
Cube L=W=D
8.8 4.0 5.0 Diameter, b, ft (or length and width of cube) 12.3 signengineering@gmail.com Drilled Shaft Foundation Cube Foundation 8.8 15.1 13.0 Depth, D, ft D= 0.5*A{1+[1+(4.36*Hcent/A)]^.5} 4' dia x 15.1' deep 8.9' cube, L=W=D 3.7 8.3 6.6 A term A = 2.34*F/(S1*b) or 5' dia x 13' deep 880 1199 1199 S1 or S3 S1 = 2*Ssoil*D/3
0 offset 150
Spread Foundation Length, L, ft Width, W, ft Depth, D, ft "
2535 Qbot, psf, Qbot = 1.3*(Q+100pcf*(D-1)) Total Weight, Wt, kips, Wt = L * W * D * .15 kips/ft3 Toe Length, Toe, ft, Toe = Wt / (W * Qbot) Bearing Eccentricity, e, ft, e = L / 2 - Toe / 3 Overturning Capacity Calc, OT, kip.ft, OT = Wt / e / 1.5safety 237.6 Job250654,Sign1,Sht1of2,Rev0,Day250714
This seal for structural engineering (Support Column & Foundation ONLY)
Signs Galore Rigdon Center
1958 Lewis Turner Blvd Fort Walton Beach, FL 32547
JOB # 250654
UNO, in 2500 psi or higher concrete, embed support columns, anchor bolts, and/or vertical rebar to 6" from bottom in drilled shaft and cube foundations, and to 3" from bottom in spread foundations.
laterally unconstrained at grade Drilled Shaft Foundation, Code Section 1807.3.2
Mark Disosway, PE, 163 SW Midtown Place, Ste 103, Lake City, Florida 32025 386-754-5419
SCOPE OF WORK: Design sign support column and foundation to meet structural requirements of building code based on stated (not verified) site factors and size & shape based on sign installer's drawing, attached. By using this engineering the sign owner, manufacturer, and installer accept responsibility to: Design, build, and install sign cabinet, face, attachment, electrical, etc according to building, appendix h, sign, fire, UL, zoning codes. Verify site conditions match stated wind speed, risk, exposure, topo, and soil factors or request engineering revision.
MONUMENT SIGN: 2 Columns, Centered & Embedded in Foundation
Mark Disosway, Professional Engineer, Florida License 53915
This item has been digitally signed and sealed by Mark Disosway, PE, on the digital signature date. Printed copies of this document are not considered signed and sealed and the signature must be verified on any electronic copies. Valid for one sign at this location, UNO.
This engineering is for the support columns and Foundation Only. Sign cabinet, emc, emc cross supports, and their attachment together and attachment to support columns designed by sign manufacturer, not part of this engineering seal. Sign must be designed and built by sign manufacturer to comply with all codes and withstand stated windload.
Soil Bearing Capacity, Ssoil=150 psf/ft for Sand, silty sand, clayey sand, silty gravel, clayey gravel
Soil Bearing Capacity, Q=2000 psf for Sand, silty sand, clayey sand, silty gravel, clayey gravel
16" L x 16" W x 0.375" wall, A500 46 ksi HSS Steel Column, S=109 M=250.7 Florida, FBC 8th Ed (2023), Sect 1609 wind ref ASCE 7-22
Terrain Kzt=1, no hill, ridge, or escarpment >15' high; Directionality Kd=0.85; Gust G=0.85 rigid structure;
Kz=2.01*(H/900)^(2/9.5)ExpC, (700&11.5)ExpD; qh,ult=0.00256*Kz*Kzt*Kd*V²ult
← Presumptive soil typeSand, silty sand, clayey sand, silty gravel, clayey gravelAcceptable Sign Support Columns direct_embed type foundation
2.
2.
5.
5"
58" 54"
64"
SI
D
E
VI
EW
• Sign manufacturer/installer's design, detailing, fabrication, and erection shall conform to the following specifications: Building Code, ASTM specifications, ACI-318 for reinforced concrete, American Welding Society Code for Welding in Building Construction, AISC Specification for Design, Fabrication, and Erection of Structural Steel for Buildings.
• Materials of construction: (Unless noted otherwise)
• Structural steel (angles, shapes, plates, gussets): ASTM A-36, Fy=36 ksi.
• HSS steel tubing: A-500, Grade B, Round Fy=42ksi; Rectangular Fy=46ksi.
• Structural aluminum tubing: 6061-T6, or equivalent, Fy = 18 ksi at weld.
• Structural pipe: A-53, Grade B, Type E or S, Fy=35 ksi.
• Anchor bolts: ASTM F1554 Grade 36 with heavy hex at bottom, not “L or J” bolts.
• Connection bolts: A-325, snug tight.
• Rebar: ASTM 615, #6 or larger - Grade 60, #5 or smaller - Grade 40, 3" cover.
• Concrete: 2500 psi, 28 days.
• Provide coatings to prevent any possibility of corrosion.
• Welding design and fabrication according to AWS D1.1 (steel) or AWS D1.2 (aluminum).
• AWS certification required for all structural welders.
• Use D1.1 (steel) or D1.2 (aluminum) certified weld with same bending strength as column UNO.
• Embedded column acts as vertical reinforcement for drilled and cube foundations.
• Soil bearing capacity is Section 1806.2 Presumptive Load Bearing Value. Lateral bearing is doubled for sign poles per 1806.3.4. Soil choice types per Table 1806.2. Soil type must be applicable for entire foundation.
Flat level grade and unsaturated soil matching presumptive soil type must be verified by sign installer.
NOT TO SCALE
48" DIA 48" DIA
48" DIA x 15'-2" DEEP DRILLED SHAFT
FOUNDATION OR OTHER DRILLED SHAFT OR CUBE
FOUNDATION OPTION FROM TABLE, POURED
MONOLITHIC WITH 5.5" DEEP (2.75" ABOVE GRADE,
2.75" BELOW GRADE) x 26'-2" WIDE x 64" LONG
DECORATIVE CONCRETE SLAB. CONCRETE SLAB
IS FOR DECORATIVE PURPOSES ONLY, NOT
STRUCTURAL. SIGN INSTALLER MUST USE ONE
OF THE DRILLED SHAFT OR CUBE FOUNDATIONS
IN ADDITION TO THE SLAB.
SEE SHEET 2 FOR SPREAD FOUNDATION OPTION.
DRILLED SHAFT & CUBE
FOUNDATION OPTIONS
184" OC
(2) 16" X 16" X 0.375" WALL, A500 46 KSI HSS
STEEL COLUMNS
'-6
'-8 .7
5" O
AH
5.
5"
2.
2.
SI
D
E
VI
EW
FRONT VIEW
58" 72"
7"
300"
7"
292"
GRADE
48" DIA
184" OC
26'-2" (314")
'-2
Florida
Florida;FBC 8th Ed (2023), Sect 1609 wind ;ref ASCE 7-22;FLPE53915; https://codes.iccsafe.org/content/FLBC2023P1/chapter-16-structural-design#FLBC2023P1_Ch16_Sec1609;Florida engineer seal requirement: Embossing seal or rubber stamp- size 1 7/8";
170 Wind Speed, Vult, mph, from ASCE 7-22, Figure 26.5 III Risk Category; I, Low; II, Normal; III, Substantial Hazard; IV, Essential/Critical C Wind Exposure; C, House size obstructions for > 600 ft; D, no obstructions > 5000 ft two_drilled_pylontwo_cube_pylontwo_spread_pylon 7-22 WIND LOAD CALC: ASCE 7-22 Section 29.3.1, Solid Freestanding Signs
Grade offset (ft)
A B C D E F Sign Segment ID OAH
20.7 1.0 Segment Top Above Grade, Top, ft 20.7
24.0 24.3 Segment Width, W, ft 24.0
19.7 1.0 Segment Height, H, ft 20.7
473.50 24.33 Segment Area, ft², adjusted for grade offset
0.91 0.85 Velocity Pressure Exposure Coeff; Kz
57.1 53.4 Velocity Pressure, qh,ult, psf (per segment)
1.45 1.30 Force Coefficient, Cf (per segment) 1.55
70.4 59.0 Wind Pressure, Pult, psf = Qh,ult*G*Cf,seg
42.3 35.4 Wind Pressure, Pasd, psf = Pult*0.6
20.0 0.9 Wind Force, Fseg, kips = Pasd*Areaseg
237.1 0.5 Wind Moment Mseg kip*ft = Fseg*(Topseg-0.45*Hseg)
192.802 0.387 Wind Mcol,seg = (Fseg/2+Fseg*0.2*Wseg/spacing)*centroid
15.3 ft OC Column Spacing "grade" = 0 ft 20.87 kip Total Shear at Grade, Vtot = Sum (Fseg)
11.38 237.6 kip*ft Total Moment at Grade, Mtot = Sum (Fseg * centroidseg)
16.97 kip Column Shear, Vcol = Vtot/2+Sum(Fseg*0.2*W)/Spacing
11.38 0.81 193.2 kip*ft Column Moment at Grade, Mcol = sum(Mcol,seg)
Cube L=W=D
Diameter, b, ft (or length and width of cube) signengineering@gmail.com Depth, D, ft D= 0.5*A{1+[1+(4.36*Hcent/A)]^.5} A term A = 2.34*F/(S1*b) S1 or S3 S1 = 2*Ssoil*D/3
Spread Foundation (Long is perpendicular to face) offset 150
10.5' long x 22' wide x 3.2' deep Spread Foundation
10.5 Length, L, ft
22.0 Width, W, ft
3.2 Depth, D, ft "
2743 Qbot, psf, Qbot = 1.3*(Q+100pcf*(D-1))
110.9 Total Weight, Wt, kips, Wt = L * W * D * .15 kips/ft3
3.7 Toe Length, Toe, ft, Toe = Wt / (W * Qbot)
4.0 Bearing Eccentricity, e, ft, e = L / 2 - Toe / 3
297.5 Overturning Capacity Calc, OT, kip.ft, OT = Wt / e / 1.5safety 237.6 Job250654,Sign1,Sht2of2,Rev0,Day250714
16" L x 16" W x 0.375" wall, A500 46 ksi HSS Steel Column, S=109 M=250.7 Florida, FBC 8th Ed (2023), Sect 1609 wind ref ASCE 7-22
This item has been digitally signed and sealed by Mark Disosway, PE, on the digital signature date. Printed copies of this document are not considered signed and sealed and the signature must be verified on any electronic copies. Valid for one sign at this location, UNO.
This seal for structural engineering (Support Column & Foundation ONLY)
Acceptable Sign Support Columns Sand, silty sand, clayey sand, silty gravel, clayey gravel ← Presumptive soil type direct_embed type foundation
Weld 6' long 6" x 6" x 3/8" angle to bottom and side of column with 3/8" fillet weld all around Rigdon Center
1958 Lewis Turner Blvd Fort Walton Beach, FL 32547
UNO, in 2500 psi or higher concrete, embed support columns, anchor bolts, and/or vertical rebar to 6" from bottom in drilled shaft and cube foundations, and to 3" from bottom in spread foundations.
This engineering is for the support columns and Foundation Only. Sign cabinet, emc, emc cross supports, and their attachment together and attachment to support columns designed by sign manufacturer, not part of this engineering seal. Sign must be designed and built by sign manufacturer to comply with all codes and withstand stated windload.
Soil Bearing Capacity, Q=2000 psf for Sand, silty sand, clayey sand, silty gravel, clayey gravel MONUMENT SIGN: 2 Columns, Centered & Embedded in Foundation#6, 12" OC each way, 2 mats, 3" from top and bottom, gentle bend around column Signs Galore
SCOPE OF WORK: Design sign support column and foundation to meet structural requirements of building code based on stated (not verified) site factors and size & shape based on sign installer's drawing, attached. By using this engineering the sign owner, manufacturer, and installer accept responsibility to: Design, build, and install sign cabinet, face, attachment, electrical, etc according to building, appendix h, sign, fire, UL, zoning codes. Verify site conditions match stated wind speed, risk, exposure, topo, and soil factors or request engineering revision.
Drilled Shaft Foundation, Code Section 1807.3.2 laterally unconstrained at grade
Mark Disosway, PE, 163 SW Midtown Place, Ste 103, Lake City, Florida 32025 386-754-5419
JOB # 250654Soil Bearing Capacity, Ssoil=150 psf/ft for Sand, silty sand, clayey sand, silty gravel, clayey gravel
Terrain Kzt=1, no hill, ridge, or escarpment >15' high; Directionality Kd=0.85; Gust G=0.85 rigid structure;
Kz=2.01*(H/900)^(2/9.5)ExpC, (700&11.5)ExpD; qh,ult=0.00256*Kz*Kzt*Kd*V²ult
Mark Disosway, Professional Engineer, Florida License 53915
• Sign manufacturer/installer's design, detailing, fabrication, and erection shall conform to the following specifications: Building Code, ASTM specifications, ACI-318 for reinforced concrete, American Welding Society Code for Welding in Building Construction, AISC Specification for Design, Fabrication, and Erection of Structural Steel for Buildings.
• Materials of construction: (Unless noted otherwise)
• Structural steel (angles, shapes, plates, gussets): ASTM A-36, Fy=36 ksi.
• HSS steel tubing: A-500, Grade B, Round Fy=42ksi; Rectangular Fy=46ksi.
• Structural aluminum tubing: 6061-T6, or equivalent, Fy = 18 ksi at weld.
• Structural pipe: A-53, Grade B, Type E or S, Fy=35 ksi.
• Anchor bolts: ASTM F1554 Grade 36 with heavy hex at bottom, not “L or J” bolts.
• Connection bolts: A-325, snug tight.
• Rebar: ASTM 615, #6 or larger - Grade 60, #5 or smaller - Grade 40, 3" cover.
• Concrete: 2500 psi, 28 days.
• Provide coatings to prevent any possibility of corrosion.
• Welding design and fabrication according to AWS D1.1 (steel) or AWS D1.2 (aluminum).
• AWS certification required for all structural welders.
• Use D1.1 (steel) or D1.2 (aluminum) certified weld with same bending strength as column UNO.
• Embedded column acts as vertical reinforcement for drilled and cube foundations.
• Soil bearing capacity is Section 1806.2 Presumptive Load Bearing Value. Lateral bearing is doubled for sign poles per 1806.3.4. Soil choice types per Table 1806.2. Soil type must be applicable for entire foundation.
Flat level grade and unsaturated soil matching presumptive soil type must be verified by sign installer.
NOT TO SCALE
184" OC
GRADE
'-6
'-8 .7
5" O
AH
5.
5"
2.
2.
26'-2" (314")
58" 54"
SI
D
E
VI
EW
22'-0" WIDE x 10'-6" x (38" BELOW GRADE, 2.75" ABOVE GRADE) DEEP CONCRETE SPREAD FOUNDATION, w/ #6 REBAR MATS AT 12" OC EACH WAY, 3"
FROM TOP AND 3" FROM BOTTOM, WELD 6' LONG 6" X 6" X 3/8" ANGLE TO
BOTTOM AND SIDE OF COLUMN WITH 3/8" FILLET WELD ALL AROUND, POURED
MONOLITHIC WITH 64" LONG x 5.5" DEEP DECORATIVE SLAB EXTENDING 18" TO
THE LEFT AND 32" TO THE RIGHT OF THE SPREAD FOUNDATION. CONCRETE
SLAB IS FOR DECORATIVE PURPOSES ONLY, NOT STRUCTURAL. SIGN
INSTALLER MUST USE THE SPREAD FOUNDATION IN ADDITION TO THE SLAB.
SEE SHEET 1 FOR DRILLED SHAFT AND CUBE FOUNDATION OPTIONS.
FRONT VIEW
22'-0" (264") 18" 32"
58" 54"
SI
D
E
VI
EW
64"
SIDE VIEW TO SHOW 64" LONG x 5.5"
DEEP DECORATIVE SLAB EXTENDING 18"
TO THE LEFT AND 32" TO THE RIGHT OF
THE SPREAD FOUNDATION. SEE SIDE
VIEW DETAIL ABOVE FOR SPREAD
FOUNDATION SIDE VIEW.
10'-6"
SPREAD
FOUNDATION
SLAB
SPREAD
FOUNDATION
OPTION
2.
184" OC
7"
300"
7"
292"
40"40"
GRADE
(2) 16" X 16" X 0.375" WALL, A500 46 KSI HSS
STEEL COLUMNS
| 2025-07-14T17:19:38-0400 | |
| Mark d Disosway |
| 2025-07-14T17:20:20-0400 | |
| Mark d Disosway |
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