260399_(Sign_Engineering)_Convention_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 for a pylon sign installation at the Destin-Fort Walton Beach Convention Center, located at 1250 Miracle Strip Parkway SE, Fort Walton Beach, Florida 32548. The document, prepared by Mark Disosway, Professional Engineer (Florida License 53915), provides detailed structural calculations for support columns and foundation design for a two-column pylon sign structure. The engineering design addresses wind load calculations in accordance with ASCE 7-22 standards and Florida Building Code (FBC) 8th Edition Section 1609 requirements. The project utilizes a 180 mph ultimate wind speed with Risk Category III classification and Wind Exposure Category D. The design specifications include two 22-inch by 22-inch by 0.375-inch wall A500 46 ksi HSS steel columns centered and embedded in a foundation system. Multiple foundation options are presented, including drilled shaft foundations (4-foot diameter by 24-foot-9-inch deep or 5-foot diameter by 21-foot-2-inch deep), cube foundations (10-foot-10-inch cube), and spread foundation options (13-foot-9-inch long by 23-foot-6-inch wide by 4-foot-2-inch deep). The engineering is valid for one sign at this location only and specifically covers structural support columns and foundation design; the sign cabinet, electronics, cross supports, and attachments are excluded from this engineering seal and remain the responsibility of the sign manufacturer.
The structural design incorporates presumptive soil bearing capacity values of 150 psf per foot and 2000 psf for sand, silty sand, clayey sand, silty gravel, and clayey gravel soils. All materials must conform to specified ASTM standards, including ASTM A-36 structural steel, A-500 Grade B HSS tubing, ASTM F1554 Grade 36 anchor bolts, and 2500 psi concrete. The scope of work explicitly places design and installation responsibility on the sign owner, manufacturer, and installer to verify site conditions match stated wind speed, risk exposure, topography, and soil factors; to design and build the sign cabinet and face according to all applicable building, fire, UL, and zoning codes; and to request engineering revision if site conditions differ from those stated. AWS certification is required for all structural welders, and comprehensive material specifications address welding design, concrete placement, rebar requirements, and corrosion prevention. The document bears the digital signature and seal of Mark Disosway, PE, dated May 21, 2026, and includes contact information at 163 SW Midtown Place, Suite 103, Lake City, Florida 32025 (386-754-5419).
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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";
180 Wind Speed, Vult, mph, from ASCE 7-22, Figure 26.5 III Risk Category; I, Low; II, Normal; III, Substantial Hazard; IV, Essential/Critical D 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
26.4 12.4 5.0 Segment Top Above Grade, Top, ft 26.4
24.0 24.3 10.0 Segment Width, W, ft 21.4
14.0 7.4 5.0 Segment Height, H, ft 26.4
336.00 180.47 50.00 Segment Area, ft², adjusted for grade offset
1.14 1.03 1.03 Velocity Pressure Exposure Coeff; Kz
80.1 72.6 72.6 Velocity Pressure, qh,ult, psf
1.75 1.65 1.40 Force Coefficient, Cf 1.60
119.2 101.9 86.4 Wind Pressure, Pult, psf = qh,ult*G*Cf,seg
71.5 61.1 51.9 Wind Pressure, Pasd, psf = Pult * 0.6
24.0 11.0 2.6 Wind Force, Fseg, kips = Pasd*Areaseg
466.7 96.1 6.5 Wind Moment Mseg, kip*ft = Fseg*(Topseg-Hseg/2)
379.4 78.5 4.1 Mcol,seg = (Fseg/2+Fseg*0.2*Wseg/spacing)*centroidseg
15.3 ft OC Column Spacing "grade" = 0 ft 37.66 kip Total Shear at Grade, V = Sum (Fseg)
15.115 569.2 kip*ft Total Moment at Grade, M = Sum(Mseg)
30.19 kip Column Shear, Vc = sum(Fseg)/2+sum((Fseg*0.2)*width)/Spacing
15.303 0.81 462.0 kip*ft Column Moment at Grade, Mc = sum(Mcol,seg)
Drilled Shaft Foundation 4' dia. x 24'-9" deep or 5' dia. x 21'-2" deep
Cube Foundation 10'-10" cube, L=W=D
Cube L=W=D
10.8 4.0 5.0 Diameter, b, ft (or length and width of cube) 15.3 signengineering@gmail.com
10.8 24.7 21.1 Depth, D, ft D= 0.5*A{1+[1+(4.36*Hcent/A)]^.5}
4.3 14.7 11.8 A term A = 2.34*F/(S1*b)
1082 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 Soil Bearing at Bottom of Foundation, Qbot, psf, Qbot = 1.3*(Q+100pcf*(D-1)) https://ascehazardtool.org/#lat=32.841681&lon=-83.751579&z=16&r=2&sc=6&sv=7-16&m=imperial&l=Wind&v=#lat=30.39766&lon=-86.594925&z=19&r=3&sc=7&sv=7-22&m=imperial&l=Wind&v= https://ma ps.app.goo .gl/RQ7s9
569.2 Job260399,Sign1,Sht1of2,Rev0,Day260521
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.
JOB # 260399
PYLON 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 seal for structural engineering (Support Column & Foundation ONLY)
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.
Mark Disosway, PE, 163 SW Midtown Place, Ste 103, Lake City, Florida 32025 386-754-5419 laterally unconstrained at grade Drilled Shaft Foundation, Code Section 1807.3.2
Signs Galore Convention Center
1250 Miracle Strip Pkwy SE Fort Walton Beach, FL 32548
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.
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
22" L x 22" W x 0.375" wall, A500 46 ksi HSS Steel Column, S=223 M=512.9 direct_embed type foundation Acceptable Sign Support Columns ← Presumptive soil typeSand, silty sand, clayey sand, silty gravel, clayey gravel
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
• 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.
48"
SI
D E
VI
EW
NOT TO SCALE
48" DIA 48" DIA
48" DIA x 24'-9" DEEP DRILLED
SHAFT FOUNDATION OR OTHER
DRILLED SHAFT OR CUBE
FOUNDATION OPTION FROM
TABLE. SEE SHEET 2 FOR
SPREAD FOUNDATION OPTION.
(2) 22" X 22" X 0.375" WALL, A500 46 KSI HSS STEEL COLUMNS
'-5
O
AH
FRONT VIEW
60"
48" DIA
184" OC
'-9
300"
GRADE
292"
DRILLED SHAFT & CUBE
FOUNDATION OPTIONS
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";
180 Wind Speed, Vult, mph, from ASCE 7-22, Figure 26.5 III Risk Category; I, Low; II, Normal; III, Substantial Hazard; IV, Essential/Critical D 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
26.4 12.4 5.0 Segment Top Above Grade, Top, ft 26.4
24.0 24.3 10.0 Segment Width, W, ft 21.4
14.0 7.4 5.0 Segment Height, H, ft 26.4
336.00 180.47 50.00 Segment Area, ft², adjusted for grade offset
1.14 1.03 1.03 Velocity Pressure Exposure Coeff; Kz
80.1 72.6 72.6 Velocity Pressure, qh,ult, psf
1.75 1.65 1.40 Force Coefficient, Cf 1.60
119.2 101.9 86.4 Wind Pressure, Pult, psf = qh,ult*G*Cf,seg
71.5 61.1 51.9 Wind Pressure, Pasd, psf = Pult * 0.6
24.0 11.0 2.6 Wind Force, Fseg, kips = Pasd*Areaseg
466.7 96.1 6.5 Wind Moment Mseg, kip*ft = Fseg*(Topseg-Hseg/2)
379.4 78.5 4.1 Mcol,seg = (Fseg/2+Fseg*0.2*Wseg/spacing)*centroidseg
15.3 ft OC Column Spacing "grade" = 0 ft 37.66 kip Total Shear at Grade, V = Sum (Fseg)
15.115 569.2 kip*ft Total Moment at Grade, M = Sum(Mseg)
30.19 kip Column Shear, Vc = sum(Fseg)/2+sum((Fseg*0.2)*width)/Spacing
15.303 0.81 462.0 kip*ft Column Moment at Grade, Mc = 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
13'-9" long x 23'-6" wide x 4'-2" deep Spread Foundation
13.8 Length, L, ft
23.5 Width, W, ft
4.2 Depth, D, ft "
2806 Soil Bearing at Bottom of Foundation, Qbot, psf, Qbot = 1.3*(Q+100pcf*(D-1))
202.0 Total Weight, Wt, kips, Wt = L * W * D * 0.15 kips/ft3
6.1 Toe Length, Toe, ft, Toe = Wt / (W * Qbot) https://ascehazardtool.org/#lat=32.841681&lon=-83.751579&z=16&r=2&sc=6&sv=7-16&m=imperial&l=Wind&v=#lat=30.39766&lon=-86.594925&z=19&r=3&sc=7&sv=7-22&m=imperial&l=Wind&v=
4.8 Bearing Eccentricity, e, ft, e = L / 2 - Toe / 3
https://ma ps.app.goo .gl/RQ7s9
650.7 Overturning Capacity Calc, OT, kip*ft, OT = Wt / e / 1.5safety 569.2 Job260399,Sign1,Sht2of2,Rev0,Day260520
#7, 12" OC each way, 2 mats, 3" from top and bottom, gentle bend around column
Signs Galore Weld 6' long, 6" x 6" x 3/8" angle to bottom and side of column with 3/8" fillet weld all around. Convention Center
1250 Miracle Strip Pkwy SE Fort Walton Beach, FL 32548
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
Mark Disosway, PE, 163 SW Midtown Place, Ste 103, Lake City, Florida 32025 386-754-5419
JOB # 260399Soil 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 PYLON SIGN: 2 Columns, Centered & Embedded in Foundation
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
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 seal for structural engineering (Support Column & Foundation ONLY)
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
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.
22" L x 22" W x 0.375" wall, A500 46 ksi HSS Steel Column, S=223 M=512.9 Florida, FBC 8th Ed (2023), Sect 1609 wind ref ASCE 7-22
Acceptable Sign Support Columns Sand, silty sand, clayey sand, silty gravel, clayey gravel ← Presumptive soil type direct_embed type foundation(2) 22" X 22" X 0.375" WALL, A500 46 KSI HSS STEEL COLUMNS
• 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.
48"
SI
D
E
VI
EW
NOT TO SCALE
'-5
O
AH
FRONT VIEW
60"
300"
GRADE
292"
4' -2
23'-6"
184" OC
13'-9"
4' -2
SPREAD
FOUNDATION
OPTION
23'-6" WIDE x 13'-9" x 4'-2" DEEP CONCRETE SPREAD FOUNDATION, w/ #7 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. SEE SHEET 1 FOR DRILLED SHAFT AND CUBE
FOUNDATION OPTIONS.
| 2026-05-21T16:47:47-0400 | |
| Mark d Disosway |
| 2026-05-21T16:48:11-0400 | |
| Mark d Disosway |
File details come from the government source that posted it. Updated .