Attachment 08 - Structural Calculations.pdf
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- Attached to
- Prescott Replace Steam Boilers (Project No. 649-22-104) Federal contract opportunity
- Solicitation number
- 36C26226B0017
About this file
This is a structural calculations document prepared by WCA Structural Engineering for the replacement of steam boilers at the Northern VA Health Care System facility located at 500 N. State Highway 89, Prescott, Arizona 86313. The document, dated November 1, 2023, contains engineering analysis and design criteria for supporting new boiler installations, including foundation design, removal of existing north foundation wall and window, replacement of mezzanine structures, design of new steel stairs for a second entrance, and installation of new header and window openings. The calculations are based on IBC 2018 building code standards and address structural loading parameters including dead load on platform (37,000 lbs for boiler), live loads (40 psf), snow loads (26 psf roof, 34 psf ground), seismic design (SDS 0.344, Risk Category IV, Site Class D), and wind loads (111 mph ultimate wind pressure at 55 psf). The project references Superior Boiler equipment with specifications including a design capacity of 10,500 lb/hr gross capacity at maximum continuous rating, natural gas fuel, 160 psig maximum allowable working pressure, and steam generation at 70 psig operating pressure with 316°F saturated steam temperature at the steam drum.
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STRUCTURAL CALCULATIONS
Northern VA Health Care System 500 N. State HWY 89 Prescott AZ, 86313
Construction Documents
Engineer of Record
Cliff Cole
Prepared by:
Timothy P. Thurgood
23116
SLC1 Dunnage Generator Support Frame
Project #:
Wednesday, November 1, 2023
EA Solutions
324 S State Street
SLC, UTPrescott AZ, 86313
Project Name:
City/State:
Replace Steam Boilers Client Name:
Street Number:
City/State
Northern VA Health Care System
500 N. State HWY 89 Street Number:
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
11/07/2023 Page 1 of 82
JUNE 6, 2025
Attachment A
WCA Structural Engineering 442 North Main Street Bountiful UT, 84010
1. PG#
2. PG#
3. PG#
4. PG#
Foundation Elements/Boiler
Design Criteria and Scope
Loading
Stairs
Calculation Index
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
11/07/2023 Page 2 of 82
1.
Project Information
County
Dead
Boiler 37,000 # Superior Boiler
Dead 20 psf
Live
Live Load 40 psf
Snow
Roof Snow 26 psf
Ground Snow 34 psf
Seismic
SDS 0.344
Wind
Wind Speed 111 mph Ultimate
Wind Pressure 55 psf
= 30 in
= D
= 1500 psf
IBC 2018
Address/City/State/Zip
Area/Subdivision NA
Salt Lake
NA
Min Frost
Site Class
Soil Bearing Pressure
Geotechnical design basis
Description
Dead Load on Platform
Description
Description
Live Load on Platform
Live load on Platform
Ground Snow
Description
Design Short Sprectral Resonse
Gravity Load Parameters
VA Medical
IV
Design Criteria and Scope
Jurisdiction/ Occupancy
Deferred Submittals
Jurisdiction
Building Code
Soil
Use and Occupancy classification
Risk Category
Northern VA Health Care System 500 N. State HWY 89 Prescott AZ, 86313
11/07/2023 Page 3 of 82
Scope
Design/Verify the existing boiler foundation elements to support new boilers. Remove the exsiting north foundation wall and window for install of new boilers. Replace foundation wall and window after install of boiler.
Remove and replace existing mezzanine for install of boilers. Design new steel stair for second entrance. Design new header and window opening to stairs.
11/07/2023 Page 4 of 82
2. Loading
11/07/2023 Page 5 of 82
This is a beta release of the new ATC Hazards by Location website. Please contact us with feedback.
The ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why.
Hazards by Location
Search Information
Coordinates: 34.55389376354381, -112.45270965332031
Elevation: 5329 ft
Timestamp: 2023-08-15T18:58:08.313Z
Hazard Type: Wind
ASCE 7-16
MRI 10-Year 71 mph
MRI 25-Year 77 mph
MRI 50-Year 82 mph
MRI 100-Year 87 mph
Risk Category I 95 mph
Risk Category II 101 mph
Risk Category III 107 mph
Risk Category IV 111 mph
ASCE 7-10
MRI 10-Year 76 mph
MRI 25-Year 84 mph
MRI 50-Year 90 mph
MRI 100-Year 96 mph
Risk Category I 105 mph
Risk Category II 115 mph
Risk Category III-IV 120 mph
ASCE 7-05
ASCE 7-05 Wind Speed 90 mph
The results indicated here DO NOT reflect any state or local amendments to the values or any delineation lines made during the building code adoption process. Users should confirm any output obtained from this tool with the local Authority Having Jurisdiction before proceeding with design.
Please note that the ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why.
Disclaimer Hazard loads are interpolated from data provided in ASCE 7 and rounded up to the nearest whole integer. Per ASCE 7, islands and coastal areas outside the last contour should use the last wind speed contour of the coastal area – in some cases, this website will extrapolate past the last wind speed contour and therefore, provide a wind speed that is slightly higher. NOTE:
For queries near wind-borne debris region boundaries, the resulting determination is sensitive to rounding which may affect whether or not it is considered to be within a wind-borne debris region.
Mountainous terrain, gorges, ocean promontories, and special wind regions shall be examined for unusual wind conditions.
While the information presented on this website is believed to be correct, ATC and its sponsors and contributors assume no responsibility or liability for its accuracy. The material presented in the report should not be used or relied upon for any specific application without competent examination and verification of its accuracy, suitability and applicability by engineers or other licensed professionals. ATC does not intend that the use of this information replace the sound judgment of such competent professionals, having experience and knowledge in the field of practice, nor to substitute for the standard of care required of such professionals in interpreting and applying the results of the report provided by this website. Users of the information from this website assume all liability arising from such use. Use of the output of this website does not imply approval by the governing building code bodies responsible for building code approval and interpretation for the building site described by latitude/longitude location in the report.
Map data ©2023 Report a map error
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
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This is a beta release of the new ATC Hazards by Location website. Please contact us with feedback.
The ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why.
Hazards by Location
Search Information
Address: prescott AZ VA Hospital
Coordinates: 34.5538766, -112.45247
Elevation: 5328 ft
Timestamp: 2023-07-17T16:56:50.994Z
Hazard Type: Seismic
Reference Document: ASCE7-16
Risk Category: IV
Site Class: D-default
MCER Horizontal Response Spectrum Design Horizontal Response Spectrum
Basic Parameters
Name Value Description
SS 0.337 MCER ground motion (period=0.2s)
S1 0.102 MCER ground motion (period=1.0s)
SMS 0.515 Site-modified spectral acceleration value
SM1 0.245 Site-modified spectral acceleration value
SDS 0.344 Numeric seismic design value at 0.2s SA
SD1 0.164 Numeric seismic design value at 1.0s SA
Additional Information
Name Value Description
SDC D Seismic design category
Fa 1.531 Site amplification factor at 0.2s
Fv 2.395 Site amplification factor at 1.0s
CRS 0.906 Coefficient of risk (0.2s)
CR1 0.918 Coefficient of risk (1.0s)
PGA 0.151 MCEG peak ground acceleration
FPGA 1.499 Site amplification factor at PGA
PGAM 0.226 Site modified peak ground acceleration
TL 6 Long-period transition period (s)
SsRT 0.337 Probabilistic risk-targeted ground motion (0.2s)
SsUH 0.372 Factored uniform-hazard spectral acceleration (2% probability of exceedance in 50 years)
SsD 1.5 Factored deterministic acceleration value (0.2s)
S1RT 0.102 Probabilistic risk-targeted ground motion (1.0s)
S1UH 0.112 Factored uniform-hazard spectral acceleration (2% probability of exceedance in 50 years)
5328 ft
Map data ©2023 Report a map error
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Period (s) 0.00
0.10
0.20
0.30
0.40
0.50
Sa(g)
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Period (s) 0.00 0.05 0.10 0.15 0.20 0.25 0.30
Sa(g)
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
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S1D 0.6 Factored deterministic acceleration value (1.0s)
PGAd 0.5 Factored deterministic acceleration value (PGA)
The results indicated here DO NOT reflect any state or local amendments to the values or any delineation lines made during the building code adoption process. Users should confirm any output obtained from this tool with the local Authority Having Jurisdiction before proceeding with design.
Please note that the ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why.
Disclaimer Hazard loads are provided by the U.S. Geological Survey Seismic Design Web Services.
While the information presented on this website is believed to be correct, ATC and its sponsors and contributors assume no responsibility or liability for its accuracy. The material presented in the report should not be used or relied upon for any specific application without competent examination and verification of its accuracy, suitability and applicability by engineers or other licensed professionals. ATC does not intend that the use of this information replace the sound judgment of such competent professionals, having experience and knowledge in the field of practice, nor to substitute for the standard of care required of such professionals in interpreting and applying the results of the report provided by this website. Users of the information from this website assume all liability arising from such use. Use of the output of this website does not imply approval by the governing building code bodies responsible for building code approval and interpretation for the building site described by latitude/longitude location in the report.
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
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11/07/2023 Page 9 of 82
3. Foundation Elements/Boiler
11/07/2023 Page 10 of 82
714 Corey Road, Hutchinson, KS 67501 (620) 662-6693 sales@superiorboiler.com SuperiorBoiler.com
J&B Sales, Project Proposal: VA Prescott Proposal Number: 4100679 R1 Date: October 14, 2022
Ds & O TYPE
SHAWNEE
11/07/2023 Page 11 of 82 www.superiorboiler.com 714 Corey Road, Hutchinson, KS 67501
1. Specifications A. Design Boiler gross capacity at MCR 10,500 lb/hr Blowdown Rate at MCR 210 lb/hr Boiler Net Capacity at MCR 10,500 lb/hr Fuel NG Maximum heat input 12.7 MM btu/hr Maximum allowable working pressure 160 psig Boiler operating pressure at steam drum 70 psig Saturated steam temperature at steam drum 316 oF Feed water temperature (DA to economizer) 227 oF Ambient air temperature 70 oF Relative humidity 60 % Elevation (FASL) <1000 ft Design blow-down rate 2 % Installation type Indoor Electrical supply power available 460V/3Ph/60Hz Control supply power available 120V Project location specific
B. Boiler Specifications Boiler type Ds O Flue gas discharge location Top Top Boiler overall height 10’- 0” 10’- 0” ft-in Boiler overall width 8’- 4” 8’- 2” ft-in Boiler length over casing (less burner) 10’- 4” 10’- 6” ft-in Boiler length including burner (assumed) 15’- 4” 15’- 6” ft-in Estimated shipping weight 28,000 28,000 lbs Estimated weight at operation 37,000 37,000 lbs Steam outlet line size at saturated steam drum 6” 6” in Boiler feed water inlet line size 1.50” 1.50” in Steam drum diameter (I.D.) and thickness 24” x 0.75” 24” x 0.75” in Steam drum material of construction SA-516-Gr.70 SA-516-Gr.70 Lower drum diameter (I.D.) and thickness 24” x 0.75” 24” x 0.75” in Lower drum material of construction SA-516-Gr.70 SA-516-Gr.70 Convection bank tube diameter and thickness 2.0 x 0.105 2.0 x 0.105 in Membrane tube diameter and thickness 2.0 x 0.120 2.0 x 0.120 in Boiler tube material SA-178-Gr.A SA-178-Gr.A Furnace width 5’- 7” 5’- 0” ft-in Furnace height 4’- 10” 4’- 0” ft-in Furnace length 7’- 7” 7’- 8” ft-in Furnace volume 211 169 ft3
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
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Boiler bank convection heating surface area 942 1293 ft2 Furnace flat projected heating surface per ABMA 190 162 ft2
C. Economizer Specifications Design type Counter Flow Water flow direction Vertical Down Flue gas flow direction Vertical Up Maximum design pressure 490 psig Design temperature 700 oF Tube material specification SA-178 Gr. A
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
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5. Construction Details A. Package Boiler
Boiler Base:
The boiler base shall be constructed of welded beams and channels such that the boiler weight is uniformly distributed over the entire base. The base is designed to be installed on a level concrete pad or supported on concrete piers. The base is designed so as to permit the boiler to freely expand and contract without placing any undue stress on any part of the boiler or setting.
The lower drum shall be placed in the saddles of the base module and shall be load bearing on the saddles in the base. The lower drum shall then be anchored at the burner end of the base and shall be free to expand within the base toward the rear of the boiler. At the rear end of the base, the lower drum is secured to the base during shipment. Lugs are welded to the lower drum and the structural steel base. The lugs are connected together with high strength bolts and nuts. The lugs, bolts and nuts are painted safety yellow to easily spot.
The floor plate is seal welded to the lower drum, independent of the base, free to expand with the lower drum so as to prevent any stresses that would be created had the floor plate been attached to the base. The floor plate expansion is controlled by specially designed expansion guide lugs.
The controlled expansion of the floor plate with the lower drum eliminates failure of the air seal at the lower drum.
The area under the mud drum shall be supplied with insulation to maintain as much heat as possible inside of the mud drum to minimize the corrosive effects of thermal cycling.
Lower Mud Drum:
The lower drum shall be complete with all the necessary drum connections. The drum shall be designed and fabricated in accordance with the latest revision of Section I of the ASME Code and stamped accordingly with the appropriate code symbol stamp. The drum shall be of material specification SA-106-B or SA-516 Gr. 70, carbon steel plate, welded, x-rayed and stress relieved. A 12" x 16" man way opening shall be installed in each head. The man way openings shall be complete with yokes, nuts, bolts, washers, and gaskets. A bottom blow down connections shall be placed in the rear head so that the boiler can be completely drained. All tube holes shall be drilled true and radial so as to afford full parallel bearing of the tube through the drum plate. All tube holes shall be grooved regardless of the design pressure and temperature.
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Upper Steam Drum:
The upper steam drum shall be complete with all the necessary drum connections.
The drum shall be designed and fabricated in accordance with the latest revision of Section I of the ASME Code and stamped accordingly with the appropriate code symbol stamp.
The drum shall be of material specification SA-516 Gr. 70 steel plate, welded, x-rayed and stress relieved. A 12" x 16" manway opening shall be installed in each head. The man way openings shall be complete with yokes, nuts, bolts, washers, and gaskets.
The drum connections shall consist of:
1. ASME Safety Valves Steam Drum ASME Code
2. Steam Outlet Steam Drum One (1) 3 Feedwater Inlet Steam Drum One (1) 4 Blow-Off Lower Drum One Pair/Drum
5. Water Column Steam Drum One (1)
6. Feedwater Control Valve Steam Drum By Customer
7. Vent Valve Steam Drum One (1)
8. Continuous Blowdown Steam Drum One (1)
9. Drum Level Controller Steam Drum By Customer
10. Atomizing Steam Steam Drum One (1)
11. Nitrogen Blanketing Steam Drum One (1)
12. Low Water Cut-Outs Steam Drum Two (2) (1 Pair)
The upper drum shall be provided with internal piping for feed water, chemical feed, and continuous blow down. All internal fittings and pipe shall be adequately supported and removal for maintenance purposes. All tube holes shall be drilled true and radial so as to afford full parallel bearing of the tube through the drum plate. All tube holes shall be grooved regardless of the design pressure and temperature.
Steam Drum Internals:
The steam drum shall include adequate steam separating equipment to assure the specified steam quality and to maintain a stable water level under a fluctuating load. The boiler internals "Steam / Water Separators" are designed so that the steam which enters the upper drum is directed to the top of the separators and through the primary separating screens. As the steam passes through the perforated demister screens, there is a reduction in velocity of the steam which allows the water droplets to separate from the steam and return to the boiler water. The steam then travels through the secondary steam separators, which again separate the steam from the remaining water droplets prior to leaving the boiler. The primary and secondary separators as well as the internal side baffle plates are removable. These baffle plates are bolted into angle supports and frames and can be readily removed through the 12" x 16" manway opening provided
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
11/07/2023 Page 15 of 82 https://url.avanan.click/v2/___http://www.superiorboiler.com/___.YXAzOnNwZWN0cnVtZW5naW5lZXJzOmE6bzoyZGFhZmE0NTk1YWQyZjQ3ZDFlMTVmNjIzOTU2OWUyYjo2OjhmNWU6Nzc2YzYxNTVhMjE2ZDYwZDhkM2EzZjkxZmIyYzA2MTc5YWM4Y2NkZmY0OTA3NjRkYjg0MjA3N2JmZGZmMzNlNDpwOlQ6Rg at each end of the steam drum. Once the internals are removed, all ends of the boiler tubes are accessible and can be readily cleaned with conventional tube cleaning tools.
The moisture content of the steam leaving the boiler outlet shall be within ABMA guidelines when the boiler is operating under continuous load design, with normal water level and with boiler drum water having a total dissolved solid concentration, total alkalinity, and total suspended solids not in excess of the guidelines as established by the ABMA. (American Boiler Manufactures Association)
Front and Rear Wall Construction:
The front and rear exterior walls shall be fabricated of 3/8" thick steel plate that is structurally reinforced with 4" steel channels and shall be 100% water-cooled. The entire front and rear wall exteriors are covered with 10ga. galvanized steel plate so as to provide a smooth uniform surface impervious to rust.
Steam Generating Tubes:
The convection bank boiler tubes shall not be less than 2" minimum outside diameter, material specification SA-178A ERW (Option for SA-192 seamless) and of such thickness as determined by the design calculations as per Section I of the ASME Code plus 1/16” Corrosion allowance. All tubes are designed and arranged for natural circulation in the proper direction at all loads. The radius of all bends shall be such that a standard turbine type tube cleaner can be easily passed through the tube for cleaning of the full length.
All tubes in the furnace shall be finned tube, membrane wall design, except those in the area where the gases leave the furnace and enter the convection zone. The inboard row of tubes between the furnace and the convection zone shall be finned forming a membrane wall to prevent short circuiting of the flue gas from the furnace to the boiler flue gas outlet. Water cooling shall be provided on the sides, roof, and floor, Front and rear walls without the use of headers.
Upon completion of the installation of the boiler tubes, prior to applying any refractories, insulation, or casing materials, the boiler shall be hydrostatically tested at a pressure of one and one-half the maximum allowable working pressure per ASME Section1 requirements. The test shall be conducted in the presence of the Authorized Inspector of Hartford Steam Boiler Inspection & Insurance Company and any other inspector as required by the contract specifications.
Casing / Access Doors / Observation Ports:
The inner casing shall be formed by a finned wall and a finned membrane wall forming the outside row of the convection bank and shall be fully welded forming a gas tight inner seal. The membrane furnace walls are designed to withstand an internal pressure of 15" water column.
Before applying insulation and casing onto the boiler, the boiler shall be pressure tested for air tightness. This test shall be conducted by temporally sealing off all normal openings to the boiler and applying a minimum air pressure of 10" water column. The drop in air pressure shall not exceed 10% loss water column after a period of 5 minutes.
Casing shall be 10 GA A36 Carbon steel. The casing shall completely enclose the unit with the exception of the drum ends.
WCA STRUCTURAL ENGINEERING WCA JOB # 23116 Prescott Boiler Replacment
11/07/2023 Page 16 of 82 https://url.avanan.click/v2/___http://www.superiorboiler.com/___.YXAzOnNwZWN0cnVtZW5naW5lZXJzOmE6bzoyZGFhZmE0NTk1YWQyZjQ3ZDFlMTVmNjIzOTU2OWUyYjo2OjVlOTY6NDk1NGZhY2RiZDNiYjZjOWVmYjYxOWEzNTU4ZDNjMDVkMGI4YTY1OTRmNGY2YjM4NGVmYjI0NzQ0NTZkNTZjZDpwOlQ6Rg
The side walls, roof, and floor of the boiler are to be completely covered with a minimum thickness of four (4) inches of 1,200ºF insulating blanket of the mineral wool type. Insulation over the top of the steam drum is to be a minimum of three (3) inches thick 1,200ºF insulation blanket.
The surface of the external casing shall not exceed 140ºF in an ambient air temperature of 80ºF, and a surface velocity of 2 fps (feet per second) while the boiler is operating at full capacity.
An access opening, 18" x 15", shall be provided to the furnace area. The opening shall be located in the rear wall.
Two (2) air-cooled and heat resistant furnace observation ports will be provided; and located in the rear wall.
Platforms and Ladders (Not Included) Access platforms and ladders will be provided for access to the safety valves and non-return valve located on top of the boiler, and access to the economizer. A maintenance platform will be provided for entrance into the upper drum and is to be located at the rear of the boiler.
Air & Gas Ducts The combustion air duct an integral part of the burner shall be furnished, un-insulated. Any additional breeching external of the modular enclosure shall be furnished and installed by others.
The steel duct from the economizer to the stack shall be included; insulation and lagging is required and shall be provided by others. The gas duct from the boiler outlet into the economizer inlet, and inlet expansion shall be furnished for field installation. The boiler is designed for a top discharge of flue gas.
Economizer The economizer shall be of a rectangular configuration, finned tubes, up flow of gases, and down flow of water. The inlet transition, expansion joint, and the economizer support steel are provided as an integral part of the system.
The inner casing shall be a 10 gauge carbon steel plate. The enclosure shall be insulated with 2” thick 1,200 deg F mineral wool insulation and covered with 0.020” thick corrugated galvanized carbon steel jacket.
The economizer will comply with Section I of the ASME Code. All tubing shall be carbon steel shall be SA-178 Gr. A.
The boiler outlet duct shall be fabricated of 10-gage, carbon steel plates, SA-36. All required couplings and nozzles shall be provided in accordance with the contract specifications.
The boiler is designed for a side gas outlet.
Mud Drum Heating Coil (Not Included) A steam heated mud drum coil shall be supplied. By the use of the Mud Drum Heating Coil, the boiler will remain in “Hot Standby” to provide the facility a means of an accelerated start-up and the prevention of corrosion caused by thermal cycling. Isolation valves for the coils are included, shipped loose for field installation by others.
11/07/2023 Page 17 of 82 https://url.avanan.click/v2/___http://www.superiorboiler.com/___.YXAzOnNwZWN0cnVtZW5naW5lZXJzOmE6bzoyZGFhZmE0NTk1YWQyZjQ3ZDFlMTVmNjIzOTU2OWUyYjo2OjI2ZTA6ZjVlNDNlYjgyZDRhOThkNGU5ODM3MGE5NzYwZjQ0NDA0OGRmNmFlZWZhYTc4MzJhOTU4N2VjNGQwNWRhOWJmOTpwOlQ6Rg
Wind
Fw= 2124.721 lbs Remarks: Worst case wind load applicable
Seismic Design Category D-Default
SDS= 0.344 Remarks: Short Period Design Acceleration
Fp= 0.1032 x Wp
Fp= 3818.4 lbs Remarks: Seismic Force actting at Center of Gravity
1 Ip= Impotance Factor
2.5 Rp= component response modification factor
1 ap= component amplification factor
0 z= height in structure at point of attachment
1 h= average roof height
Wind ASCE7-16 29.4 Design Wind Loads" Other Structures
1 mph Desing Wind Speed per ASCE7-16 for site
C Exposure= Exposure Class per ASCE7-16 26.26.7
0.0 psf qz= Velocity pressure evaluated at height z per 26.10 at centroid of Af qz=.00256KzKztKdKeV
5.0 ft z= Centroidal height of eqipment
0.85 G= Gust Effect Factor from section 26.11
1.3 Cf1= force coefficient from Fig 29.4-1 throug 29.4-4 Wind Override HxL
103 sq ft Af1= projected area normal to wind (HxL)
1.30395189 Cf2= force coefficient from Fig 29.4-1 throug 29.4-4 Wind Override HxD
84 sq ft Af2= projected area normal to wind (HxD)
0 lbs FL= Wind force acting on Length Face of Unit
0 lbs FD= Wind Force acting on Depth Face of Unit
Dimensions
Height H= 120 in Remarks: Unit height
Length L= 124 in Remarks: Unit length or width
Depth = 97 in Remarks: Unit depth
Weight Wp = 37000 lbs Remarks: Overall Weight of unit
CGEQ= 80 in Remarks: Center of Gravity
CGW= 60
Lb= x in Remarks: Length between base anchor points
Db= x in Remarks: Depth between base anchor points
Design Summary
Tacnhor= 171.8323 lbs Remarks: Maximum tension load per anchor
Vanchor= 300.51 lbs Remarks: Maximum shear load per anchor
Tallowable 5136 lbs Remarks: Allowable Tension per anchor
Vallowable 2270 lbs Remarks: Allowable Shear per anchor
Ω 2 Remarks: Omega Factor for seismic connection in conc.
CSR= 0.231291 Remark: Stress Ratio- Must be less than or equal to 1
Therefore
Anchorage Design Of Generator
Provide 12.5 ft. x 10 ft. x 72 in. thick reinforced concrete slab/foundation with #4 bars @12 in O.C. top and bottom and Provide (8) 3/4" Ø Hilti HIT RE 500 V3 +HAS-R
304/316 SS 3/4 w/12 ED & 6 embed and tmin= 8 anchors are adequate
11/07/2023 Page 18 of 82
T sheet 1 of 3
Client
Job:
Job#
Subject: Revised By TPT
By: TPT DATE: 11/1/2023 Chk By: TPT Date 11/1/2023 Revision Date 3/8/2023
Anchor Design Parameters
Equipment Dimensions
Equipment Type Boiler
Name Superior Boiler Seismic 3000 psi
L= 124 in 124 in Length 12 in
D= 97 in 97 in Depth 6 in h= 120 in 120 in Height 8 in
CGEQ= 80.0 Center of Gravity T=Max Tension (LRFD) 10271 lbs
CGEQover= CG overide V=Max Shear (LRFD) 4540 lbs hstand= Stand Height T/Ω= 5136 lbs
CGwind= 60 in Wind CG V/Ω= 2270 lbs
Loading Load Combination LRFD
TYPE
Dead Wp= 37000 lbs Weight
EQh SDS= 0.344 EQ-Ω-TENSION 2 EQ-Ω-SHEAR 2
FPL*WP= 3818 lbs Fp= 0.1032
FPD*WP= 3818 lbs Ip= 1
EQV +/- Eqv= 0.2SDSWp 2546 lbs
Wind FWL= 0 lbs
FWD= 0 lbs
Force Acting on Length (Overturning about Depth)
EQ Wind Equation LRFD Equation ASD OTM= Overturnimg Moment
25.46 k-ft 0.00 k-ft =FP*CG RM = Restoring Moment
124.30 k-ft 134.59 k-ft =(0.9-0.2SDS)Wp*D/2
189.74 k-ft 179.45 k-ft =(1.2+0.2SDS))Wp*D/2
0.00 k-ft 0.00 k-ft =OTM-MRt
215.19 k-ft 179.45 k-ft =OTM+MRc
Anchor Bolt Design and Check with overturning about depth of the eqipment
Long Side=4 Total # of bolts for shear 8
Select off set of Connector 0 in
Shear/bolt or bolt group,EQ 525 lbs Anchorage Interaction check (T/Tall (5/3
)+V/Vall (5/3
)<=1)
Shear/bolt or bolt group,W 0 lbs T/Tall (5/3)
+ V/Vall (5/3) <1
OTMT/D Total EQ 0 0.2313 0.231
EQ 0 lbs W 0 0.0000 0.000 w = 0 lbs
OTMC/D Total
EQ= 26622 lbs
Wind = 22200 lbs
Force Acting on Depth (Overturning about Length)
EQ Wind Equation LRFD Equation ASD OTM= Overturnimg Moment
25.46 k-ft 0.00 k-ft =FP*CG RM = Restoring Moment
158.90 k-ft 172.05 k-ft =(0.9-0.2SDS)Wp*L/2
242.55 k-ft 229.40 k-ft =(1.2+0.2SDS))Wp*L/2
0.00 k-ft 0.00 k-ft =OTM-MRt
268.01 k-ft 229.40 k-ft =OTM+MRc
Anchor Bolt Design and Check with overturning about Length of the eqipment
Short Side=2 Total # of bolts for shear 8
Select off set of Connector 0 in
Shear/bolt or bolt group,EQ 525 lbs Anchorage Interaction check (T/Tall (5/3
)+V/Vall (5/3
)<=1)
Shear/bolt or bolt group,W 0 lbs T/Tall (5/3)
+ V/Vall (5/3) <1
OTMT/D Total EQ 0 0.2313 0.231
EQ 0 lbs W 0 0.0000 0.000 w = 0 lbs
OTMC/D Total
EQ= 25936 lbs
Wind = 22200 lbs
Combined Anchorage Check
Anchorage Interaction check (T/Tall (5/3
)+V/Vall (5/3
)<=1) Tanchor= 0 lbs Tanchor= 0 lbs
T/Tall (5/3)
+ V/Vall (5/3) <1 (CSR) Vanchor= 525 lbs Vanchor= 0 lbs
EQ 0 0.2313 0.231
W 0 0.0000 0.000
VA Medical
Anchor and Slab Design for Pad Mounted Electrical Equipment
CVE
23116
=(0.6,0.7)FP*CG
=(0.6-0.2SDS))Wp*L/2
=(1.0+0.2SDS))Wp*L/2
=OTM-MRt
=OTM+MRc
Out put in blue
=(0.6,0.7)FP*CG
=(0.6-0.2SDS))Wp*D/2
Compression
Per ft
2510 plf
2148 lbs
(8) 3/4" Ø Hilti HIT RE 500 V3 +HAS-R 304/316 SS 3/4 w/12 ED & 6 embed and tmin= 8 anchors are adequate
EQ W
Moment (Compression)
Select # of Connectors
Tension
Per Bolt
0 lbs
0 lbs
+ Accidental Torsion 10%
Design Force
OTM
MRt (Tension )
Moment (Tension)
Factor of Width and Length used
MRc (Compresssion)
Compression
Per ft
3293 plf
2746 lbs
Ten=+; Comp=-
L=100%
Weight Adjustment
Select # of Connectors
+ Accidental Torsion 10%
Tension
Per Bolt
0 lbs
0 lbs
MRc (Compresssion)
Moment (Tension)
Moment (Compression)
D=100%
Weight Adjustment
=(1.0+0.2SDS))Wp*D/2
=OTM-MRt
=OTM+MRc
Min Concrete t (in)
OTM
MRt (Tension )
Ten=+; Comp=-
Factor of Width and Length used
Select Anchor
3/4" Ø Hilti HIT RE 500 V3 +HAS-R 304/316 SS 3/4 w/12 ED & 6 embed and tmin= 8
Edge Distance
Post Installed Anchor Design
Design Force
Embedment
Concrete Strength
120 in
97 in
37000 lbs x
Fpx
Fpy z
Ab offset h=
D=
Wp=
11/07/2023 Page 19 of 82
4. Stairs
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Current Date: 11/1/2023 7:55 AM Units system: English File name: I:\2023\23116 - EA Solutions - Prescott AZ Boiler\Calculations\STAIRS.retx
11/07/2023 Page 21 of 82
Current Date: 11/1/2023 7:58 AM
File name: I:\2023\23116 - EA Solutions - Prescott AZ Boiler\Calculations\STAIRS.retx
11/07/2023 Page 22 of 82
Current Date: 11/1/2023 7:56 AM
File name: I:\2023\23116 - EA Solutions - Prescott AZ Boiler\Calculations\STAIRS.retx Load condition: D2=DL+LIVE
11/07/2023 Page 23 of 82
Current Date: 8/14/2023 4:56 PM
Steel Code Check
Report: Comprehensive
Members: Hot-rolled
Design code: AISC 360-2016 LRFD
Member : 1
Design status : OK
DESIGN WARNINGS
Section information
Section name: MC 12X31 (US)
Dimensions bf = 3.670 [in] Width d = 12.000 [in] Depth k = 1.310 [in] Distance k tf = 0.700 [in] Flange thickness tw = 0.370 [in] Web thickness
Properties
Section properties Unit Major axis Minor axis
Gross area of the section. (Ag) [in2] 9.120
Moment of Inertia (local axes) (I) [in4] 202.000 11.300
Moment of Inertia (principal axes) (I') [in4] 202.000 11.300
Bending constant for moments (principal axis) (J') [in] 0.000 6.288
Radius of gyration (local axes) (r) [in] 4.706 1.113
Radius of gyration (principal axes) (r') [in] 4.706 1.113
Saint-Venant torsion constant. (J) [in4] 1.000
Section warping constant. (Cw) [in6] 267.000
Distance from centroid to shear center (principal axis) (xo,yo) [in] -2.291 0.000
Top elastic section modulus of the section (local axis) (Ssup) [in3] 33.700 4.370
Bottom elastic section modulus of the section (local axis) (Sinf) [in3] 33.700 10.524
Top elastic section modulus of the section (principal axis) (S'sup) [in3] 33.700 4.370
Bottom elastic section modulus of the section (principal axis) (S'inf) [in3] 33.700 10.524
Plastic section modulus (local axis) (Z) [in3] 39.700 8.150
Plastic section modulus (principal axis) (Z') [in3] 39.700 8.150
Polar radius of gyration. (ro) [in] 5.340
Page1
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Area for shear (Aw) [in2] 5.140 4.440
Torsional constant. (C) [in3] 1.411
Material : A36
Properties Unit Value
Yield stress (Fy): [Kip/in2] 36.00
Tensile strength (Fu): [Kip/in2] 58.00
Elasticity Modulus (E): [Kip/in2] 29000.00
Shear modulus for steel (G): [Kip/in2] 11507.94
DESIGN CRITERIA
Description Unit Value
Length for tension slenderness ratio (L) [ft] 11.30
Distance between member lateral bracing points
Length (Lb) [ft]
Top Bottom
11.30 11.30
Laterally unbraced length
Length [ft] Effective length factor
Major axis(L33) Minor axis(L22) Torsional axis(Lt) Major axis(K33) Minor axis(K22) Torsional axis(Kt)
11.30 11.30 11.30 1.0 1.0 1.0
Additional assumptions
Continuous lateral torsional restraint No
Tension field action No
Continuous flexural torsional restraint No
Effective length factor value type None
Major axis frame type Sway
Minor axis frame type Sway
DESIGN CHECKS
AXIAL TENSION DESIGN
Axial tension
Ratio : 0.00
Capacity : 295.49 [Kip] Reference : Cl.D2
Demand : 0.83 [Kip] Ctrl Eq. : D2 at 100.00%
Intermediate results Unit Value Reference
Factored axial tension capacity(φPn): [Kip] 295.49 Cl.D2
Nominal axial tension capacity (Pn) [Kip] 328.32 Eq.D2-1
AXIAL COMPRESSION DESIGN
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Compression in the major axis 33
Ratio : 0.00
Capacity : 282.86 [Kip] Reference : Cl.E3
Demand : 0.59 [Kip] Ctrl Eq. : D2 at 0.00%
Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Non slender
Unstiffened element slenderness (λ) -- 5.24
Unstiffened element limiting slenderness (λr) -- 15.89 Table.B4.1a.Case1
Stiffened element classification -- Non slender
Stiffened element slenderness (λ) -- 25.35
Stiffened element limiting slenderness (λr) -- 42.29 Table.B4.1a.Case5
Factored flexural buckling strength(φPn33): [Kip] 282.86 Cl.E3
Unbraced length (L33) [ft] 11.30 Cl.E2
Effective slenderness ((KL/r)33) -- 28.81 Cl.E2
Elastic critical buckling stress (Fe33) [Kip/in2] 344.89 Eq.E3-4
Effective area of the cross section based on the effective width (A... [in2] 9.12
Critical stress for flexural buckling (Fcr33) [Kip/in2] 34.46 Eq.E3-2
Nominal flexural buckling strength (Pn33) [Kip] 314.28 Eq.E3-1
Compression in the minor axis 22
Ratio : 0.00
Capacity : 135.32 [Kip] Reference : Cl.E3
Demand : 0.59 [Kip] Ctrl Eq. : D2 at 0.00%
Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Non slender
Unstiffened element slenderness (λ) -- 5.24
Unstiffened element limiting slenderness (λr) -- 15.89 Table.B4.1a.Case1
Stiffened element classification -- Non slender
Stiffened element slenderness (λ) -- 25.35
Stiffened element limiting slenderness (λr) -- 42.29 Table.B4.1a.Case5
Factored flexural buckling strength(φPn22): [Kip] 135.32 Cl.E3
Unbraced length (L22) [ft] 11.30 Cl.E2
Effective slenderness ((KL/r)22) -- 121.80 Cl.E2
Elastic critical buckling stress (Fe22) [Kip/in2] 19.29 Eq.E3-4
Effective area of the cross section based on the effective width (A... [in2] 9.12
Critical stress for flexural buckling (Fcr22) [Kip/in2] 16.49 Eq.E3-2
Nominal flexural buckling strength (Pn22) [Kip] 150.36 Eq.E3-1
Factored torsional or flexural-torsional buckling strength(φPn11): [Kip] 227.72 Cl.E4
Unbraced length (L11) [ft] 11.30 Cl.E2
Flexural constant (H) -- 0.82 Eq.E4-8
Torsional or flexural-torsional elastic buckling stress (Fe11) [Kip/in2] 57.84 Eq.E4-3
Elastic torsional buckling stress (Fez) [Kip/in2] 59.98 Eq.E4-7
Effective area of the cross section based on the effective width (A... [in2] 9.12
Critical stress for torsional or flexural-torsional buckling (Fcr11) [Kip/in2] 27.74 Eq.E3-2
Nominal torsional or flexural-torsional buckling strength (Pn11) [Kip] 253.02 Eq.E4-1
FLEXURAL DESIGN
Bending about major axis, M33
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Ratio : 0.02
Capacity : 107.19 [Kip*ft] Reference : Cl.F2.1
Demand : -2.33 [Kip*ft] Ctrl Eq. : D2 at 100.00%
Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Compact
Unstiffened element slenderness (λ) -- 5.24
Limiting slenderness for noncompact unstiffened element (λr) -- 28.38
Limiting slenderness for compact unstiffened element (λp) -- 10.79
Stiffened element classification -- Compact
Stiffened element slenderness (λ) -- 25.35
Limiting slenderness for noncompact stiffened element (λr) -- 161.78
Limiting slenderness for compact stiffened element (λp) -- 106.72
Factored yielding strength(φMn): [Kip*ft] 107.19 Cl.F2.1
Yielding (Mn) [Kip*ft] 119.10 Eq.F2-1
Factored lateral-torsional buckling strength(φMn): [Kip*ft] 107.19 Cl.F2.2
Limiting laterally unbraced length for yielding (Lp) [ft] 4.63 Eq.F2-5
Effective radius of gyration used in the determination of Lr (r ts) [in] 1.28 Eq.F2-7
Lateral-torsional factor (c) -- 1.16 Eq.F2-8b
Limiting laterally unbraced length for inelastic lateral-torsional bucklin... [ft] 19.76 Eq.F2-6
Lateral-torsional buckling modification factor (Cb) -- 1.33 Eq.F1-1
Nominal lateral-torsional buckling moment strength (Mn) [Kip*ft] 119.10 Eq.F2-2
Bending about minor axis, M22
Ratio : 0.00
Capacity : 18.88 [Kip*ft] Reference : Cl.F6.1
Demand : 0.00 [Kip*ft] Ctrl Eq. : D1 at 0.00%
Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Compact
Unstiffened element slenderness (λ) -- 5.24
Limiting slenderness for noncompact unstiffened element (λr) -- 28.38
Limiting slenderness for compact unstiffened element (λp) -- 10.79
Stiffened element classification -- Compact
Stiffened element slenderness (λ) -- 25.35
Limiting slenderness for noncompact stiffened element (λr) -- 161.78
Limiting slenderness for compact stiffened element (λp) -- 106.72
Factored yielding strength about a geometric axis(φMn): [Kip*ft] 18.88 Cl.F6.1
Yielding (Mn) [Kip*ft] 20.98 Eq.F6-1
DESIGN FOR SHEAR
Shear in major axis 33
Ratio : 0.00
Capacity : 99.88 [Kip] Reference : Cl.G1
Demand : 0.00 [Kip] Ctrl Eq. : D1 at 0.00%
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Intermediate results Unit Value Reference
Factored shear capacity(φVn): [Kip] 99.88 Cl.G1
Web buckling coefficient (kv) -- 1.20 Cl.G6
Web buckling coefficient (Cv) -- 1.00 Eq.G2-9
Nominal shear strength (Vn) [Kip] 110.98 Eq.G6-1
Shear in minor axis 22
Ratio : 0.02
Capacity : 86.31 [Kip] Reference : Cl.G1
Demand : 1.36 [Kip] Ctrl Eq. : D2 at 100.00%
Intermediate results Unit Value Reference
Factored shear capacity(φVn): [Kip] 86.31 Cl.G1
Web buckling coefficient (kv) -- 5.34 Eq.G2-5
Web buckling coefficient (Cv) -- 1.00 -
Nominal shear strength (Vn) [Kip] 95.90 Eq.G2-1
COMBINED ACTIONS DESIGN
Combined flexure and axial
Ratio : 0.02
Ctrl Eq. : D2 at 100.00% Reference : Eq.H1-1b
Intermediate results Unit Value Reference
Interaction of flexure and axial force: -- 0.02 Eq.H1-1b
Available flexural strength about strong axis (Mc33) [Kip*ft] 107.19 Cl.H1.1
Available flexural strength about weak axis (Mc22) [Kip*ft] 18.88 Cl.H1.1
Available axial strength (Pc) [Kip] 295.49 Cl.H1.1
Member : 2
Design status : OK
DESIGN WARNINGS
Section information
Section name: MC 12X31 (US)
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Dimensions bf = 3.670 [in] Width d = 12.000 [in] Depth k = 1.310 [in] Distance k tf = 0.700 [in] Flange thickness tw = 0.370 [in] Web thickness
Properties
Section properties Unit Major axis Minor axis
Gross area of the section. (Ag) [in2] 9.120
Moment of Inertia (local axes) (I) [in4] 202.000 11.300
Moment of Inertia (principal axes) (I') [in4] 202.000 11.300
Bending constant for moments (principal axis) (J') [in] 0.000 6.288
Radius of gyration (local axes) (r) [in] 4.706 1.113
Radius of gyration (principal axes) (r') [in] 4.706 1.113
Saint-Venant torsion constant. (J) [in4] 1.000
Section warping constant. (Cw) [in6] 267.000
Distance from centroid to shear center (principal axis) (xo,yo) [in] -2.291 0.000
Top elastic section modulus of the section (local axis) (Ssup) [in3] 33.700 4.370
Bottom elastic section modulus of the section (local axis) (Sinf) [in3] 33.700 10.524
Top elastic section modulus of the section (principal axis) (S'sup) [in3] 33.700 4.370
Bottom elastic section modulus of the section (principal axis) (S'inf) [in3] 33.700 10.524
Plastic section modulus (local axis) (Z) [in3] 39.700 8.150
Plastic section modulus (principal axis) (Z') [in3] 39.700 8.150
Polar radius of gyration. (ro) [in] 5.340
Area for shear (Aw) [in2] 5.140 4.440
Torsional constant. (C) [in3] 1.411
Material : A36
Properties Unit Value
Yield stress (Fy): [Kip/in2] 36.00
Tensile strength (Fu): [Kip/in2] 58.00
Elasticity Modulus (E): [Kip/in2] 29000.00
Shear modulus for steel (G): [Kip/in2] 11507.94
DESIGN CRITERIA
Description Unit Value
Length for tension slenderness ratio (L) [ft] 1.04
Distance between member lateral bracing points
Length (Lb) [ft]
Top Bottom
1.04 1.04
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Laterally unbraced length
Length [ft] Effective length factor
Major axis(L33) Minor axis(L22) Torsional axis(Lt) Major axis(K33) Minor axis(K22) Torsional axis(Kt)
1.04 1.04 1.04 1.0 1.0 1.0
Additional assumptions
Continuous lateral torsional restraint No
Tension field action No
Continuous flexural torsional restraint No
Effective length factor value type None
Major axis frame type Sway
Minor axis frame type Sway
DESIGN CHECKS
AXIAL TENSION DESIGN
Axial tension
Ratio : 0.00
Capacity : 295.49 [Kip] Reference : Cl.D2
Demand : 0.00 [Kip] Ctrl Eq. : D1 at 0.00%
Intermediate results Unit Value Reference
Factored axial tension capacity(φPn): [Kip] 295.49 Cl.D2
Nominal axial tension capacity (Pn) [Kip] 328.32 Eq.D2-1
AXIAL COMPRESSION DESIGN
Compression in the major axis 33
Ratio : 0.00
Capacity : 295.38 [Kip] Reference : Cl.E3
Demand : 0.01 [Kip] Ctrl Eq. : D2 at 0.00%
Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Non slender
Unstiffened element slenderness (λ) -- 5.24
Unstiffened element limiting slenderness (λr) -- 15.89 Table.B4.1a.Case1
Stiffened element classification -- Non slender
Stiffened element slenderness (λ) -- 25.35
Stiffened element limiting slenderness (λr) -- 42.29 Table.B4.1a.Case5
Factored flexural buckling strength(φPn33): [Kip] 295.38 Cl.E3
Unbraced length (L33) [ft] 1.04 Cl.E2
Effective slenderness ((KL/r)33) -- 2.66 Cl.E2
Elastic critical buckling stress (Fe33) [Kip/in2] 40574.03 Eq.E3-4
Effective area of the cross section based on the effective width (A... [in2] 9.12
Critical stress for flexural buckling (Fcr33) [Kip/in2] 35.99 Eq.E3-2
Nominal flexural buckling strength (Pn33) [Kip] 328.20 Eq.E3-1
Compression in the minor axis 22
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Ratio : 0.00
Capacity : 293.15 [Kip] Reference : Cl.E4
Demand : 0.01 [Kip] Ctrl Eq. : D2 at 0.00%
Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Non slender
Unstiffened element slenderness (λ) -- 5.24
Unstiffened element limiting slenderness (λr) -- 15.89 Table.B4.1a.Case1
Stiffened element classification -- Non slender
Stiffened element slenderness (λ) -- 25.35
Stiffened element limiting slenderness (λr) -- 42.29 Table.B4.1a.Case5
Factored flexural buckling strength(φPn22): [Kip] 293.53 Cl.E3
Unbraced length (L22) [ft] 1.04 Cl.E2
Effective slenderness ((KL/r)22) -- 11.23 Cl.E2
Elastic critical buckling stress (Fe22) [Kip/in2] 2269.74 Eq.E3-4
Effective area of the cross section based on the effective width (A... [in2] 9.12
Critical stress for flexural buckling (Fcr22) [Kip/in2] 35.76 Eq.E3-2
Nominal flexural buckling strength (Pn22) [Kip] 326.15 Eq.E3-1
Factored torsional or flexural-torsional buckling strength(φPn11): [Kip] 293.15 Cl.E4
Unbraced length (L11) [ft] 1.04 Cl.E2
Flexural constant (H) -- 0.82 Eq.E4-8
Torsional or flexural-torsional elastic buckling stress (Fe11) [Kip/in2] 1899.58 Eq.E4-3
Elastic torsional buckling stress (Fez) [Kip/in2] 1916.69 Eq.E4-7
Effective area of the cross section based on the effective width (A... [in2] 9.12
Critical stress for torsional or flexural-torsional buckling (Fcr11) [Kip/in2] 35.72 Eq.E3-2
Nominal torsional or flexural-torsional buckling strength (Pn11) [Kip] 325.73 Eq.E4-1
FLEXURAL DESIGN
Bending about major axis, M33
Ratio : 0.04
Capacity : 107.19 [Kip*ft] Reference : Cl.F2.1
Demand : -4.12 [Kip*ft] Ctrl Eq. : D2 at 100.00%
Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Compact
Unstiffened element slenderness (λ) -- 5.24
Limiting slenderness for noncompact unstiffened element (λr) -- 28.38
Limiting slenderness for compact unstiffened element (λp) -- 10.79
Stiffened element classification -- Compact
Stiffened element slenderness (λ) -- 25.35
Limiting slenderness for noncompact stiffened element (λr) -- 161.78
Limiting slenderness for compact stiffened element (λp) -- 106.72
Factored yielding strength(φMn): [Kip*ft] 107.19 Cl.F2.1
Yielding (Mn) [Kip*ft] 119.10 Eq.F2-1
Bending about minor axis, M22
Ratio : 0.00
Capacity : 18.88 [Kip*ft] Reference : Cl.F6.1
Demand : 0.00 [Kip*ft] Ctrl Eq. : D1 at 0.00%
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Intermediate results Unit Value Reference
Section classification
Unstiffened element classification -- Compact
Unstiffened element slenderness (λ) -- 5.24
Limiting slenderness for noncompact unstiffened element (λr) -- 28.38
Limiting slenderness for compact unstiffened element (λp) -- 10.79
Stiffened element classification -- Compact
Stiffened element slenderness (λ) -- 25.35
Limiting slenderness for noncompact stiffened element (λr) -- 161.78
Limiting slenderness for compact stiffened element (λp) -- 106.72
Factored yielding strength about a geometric axis(φMn): [Kip*ft] 18.88 Cl.F6.1
Yielding (Mn) [Kip*ft] 20.98 Eq.F6-1
DESIGN FOR SHEAR
Shear in major axis 33
Ratio : 0.00
Capacity : 99.88 [Kip] Reference : Cl.G1
Demand : 0.00 [Kip] Ctrl Eq. : D1 at 0.00%
Intermediate results Unit Value Reference
Factored shear capacity(φVn): [Kip] 99.88 Cl.G1
Web buckling coefficient (kv) -- 1.20 Cl.G6
Web buckling coefficient (Cv) -- 1.00 Eq.G2-9
Nominal shear strength (Vn) [Kip] 110.98 Eq.G6-1
Shear in minor axis 22
Ratio : 0.02
Capacity : 86.31 [Kip] Reference : Cl.G1
Demand : 1.84 [Kip] Ctrl Eq. : D2 at 100.00%
Intermediate results Unit Value Reference
Factored shear capacity(φVn): [Kip] 86.31 Cl.G1
Web buckling coefficient (kv) -- 5.34 Eq.G2-5
Web buckling coefficient (Cv) -- 1.00 -
Nominal shear strength (Vn) [Kip] 95.90 Eq.G2-1
COMBINED ACTIONS DESIGN
Combined flexure and axial
Ratio : 0.04
Ctrl Eq. : D2 at 100.00% Reference : Eq.H1-1b
Intermediate results Unit Value Reference
Interaction of flexure and axial force: -- 0.04 Eq.H1-1b
Available flexural strength about strong axis (Mc33) [Kip*ft] 107.19 Cl.H1.1
Available flexural strength about weak axis (Mc22) [Kip*ft] 18.88 Cl.H1.1
Available axial strength (Pc) [Kip] 293.15 Cl.H1.1
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Member : 3
Design status : OK
DESIGN WARNINGS
Section information
Section name: MC 12X31 (US)
Dimensions bf = 3.670 [in] Width d = 12.000 [in] Depth k = 1.310 [in] Distance k tf = 0.700 [in] Flange thickness tw = 0.370 [in] Web thickness
Properties
Section properties Unit Major axis Minor axis
Gross area of the section. (Ag) [in2] 9.120
Moment of Inertia (local axes) (I) [in4] 202.000 11.300
Moment…
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