lesson 14 - varco pruden buildings

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Lesson 14 06.16.09 1 of 16 Lesson 14 The Focus of this Lesson is: x Input a basic building x Change to CB-1 Main frames x Add a Crane x Check for Crane deflection requirements x Check pricing report for runway beam prices Lesson Comments: At this time we only recommend using this option if you have been through the level 2 training class. Upon completion of the crane information input, VPCommand will automatically hold deflection on and load the primary frames. It will also add and detail the crane bracket if applicable. 5 Ton Top Running Bridge Crane with Crane Beam and Cap

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Page 1: Lesson 14 - Varco Pruden Buildings

Lesson 14

06.16.09 1 of 16 Lesson 14

The Focus of this Lesson is:

Input a basic buildingChange to CB-1 Main framesAdd a CraneCheck for Crane deflection requirementsCheck pricing report for runway beam prices

Lesson Comments: At this time we only recommend using this option if you have been through the level 2 trainingclass. Upon completion of the crane information input, VPCommand will automatically holddeflection on and load the primary frames. It will also add and detail the crane bracket ifapplicable.

5 Ton Top Running BridgeCrane with Crane Beam andCap

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Building Geometry

This building can be input using the pre-definedrectangle.80 wide X 120’ x 19’6” height 1/2:12 pitch.

Frame Types1) For this lesson you should use a CB-1 with 40’

interior column spacing.2) Because the crane will attach to the endwall

frame we need to have a half load CB 1 withend posts at each endwall. The crane functionin VPCommand will only recognize interior andexterior columns as valid locations for cranebrackets.

3) To create the CB 1 with end posts:4) Open the Frame Schedule folder.5) Click one time on the CB Frame 40 IC Spacing

folder. Notice the folder opens.

6) Click and hold down the left mouse button onthe CB Frame 40 IC Spacing folder and dragup anywhere in the Schedule and release theleft mouse button. This will create a copy of thefolder.

7) To add end posts to this folder open the FrameSchedule and open the folder for the Copy ofCB Frame 40’ IC Spacing.

8) Double click Insert a new Frame Type.

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9) Choose End Posts from the frame type dropdown list. You can rename the frame type atthis point if you would like.

10) Click OK and the tree will refreshautomatically.

11) Your Endwall frame is now ready to locate.

12) Add Frame LocationsUse the frame locations shown on thefloor plan on page 1 to enter your framelocations using your new Half Load CB-1with end posts.

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13) Loading / Loads and CodesAdd your Load and Code data in for your area, oruse your Default building.

14) Adding the CraneCrane information is entered in the Crane

Schedule; this is found under the Crane folder inthe tree. Because it is a schedule you can addmore than one crane. VPCommand allows youto add up to 2 cranes per aisle with amaximum of five aisles in the building.

There are a number of different cranetypes and load capacities. For this example wewill enter a 5 ton top running crane. There arecritical dimensions that must be known to inputthe crane properly into VPCommand, you shouldhave all required clearances and loading infoprior to input.

CRITICAL DIMENSIONS: (Include OSHA Requirements.)“A” Bridge Span (centerline to centerline of runway/rail):“B” Horizontal Clearance (centerline of runway/rail to face ofcolumn)“C” Vertical Clearance (top of rail to underside of frame rafter)“D” Top of Rail Elevation (dimensioned from finished floor)

Runway Support Option: (Option B and C will require VPassistance)

A Brackets (Maximum 55 kip bracket load; Maximum 20 ton cap.crane)

B Auxiliary (Independent) Crane ColumnsC Stepped Crane Column

“B”

“C”

“D”

“A”

A B C

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15) Crane ScheduleOpen the Crane Schedule folder inthe tree.Double click on Insert a CraneDefinition to start the craneinformation input.This brings up the CraneInformation screen. Fill in the nameof the crane, this is important forbuildings that will have more thanone crane system, make it a nameyou can identify later on in theinput process

16) Fill in the Capacity and Est.Bridge Span and check the dropdown lists on the right to make sureyou have the most accurate datapossible. Use the help screens if youneed to.

17) Once you have filled out therequired information, click theApply Crane Data button. Atthis point VPCommand willcheck the information youhave input against a databaseof Kranco crane data to findthe closest match to yourinput conditions for loadingpurposes. You will see thefollowing verification.

18) Notice that the defaultinformation thatVPCommand will use is for a36’span because that isclosest to the 35’ we enteredClick yes to accept andoverwrite, if the Kranco datadoes not match what youneed, you can overwrite it inthe Specifications screen.Click the Specifications tabto view the information.

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19) All values shown on thisscreen are default valuesbased on your input. Theclearances shown may notwork based on the depth of theframe after it has beendesigned. You may need to runthe project and check theclearances on the drawings tocalculate the final clearancesyou need.

20) Click ok when yourSpecifications input iscomplete.

21) The tree will automaticallyrefresh.

22) Locating the Crane23) Now when you open the

Cranes folder your buildingname(s) will be shown.

24) Open the building nameyou would like to add thecrane to and select the wallthe crane will be located along.This should be the same wallthat you located the primaryframes along. You have to usethe same along wall as theframes because the program isgoing to read your frames forcolumn locations.

25) Double click the “Along”wall you selected to locate theFrames along.

26) From the Crane RunwayLocations window you canclick the Insert a Row buttonat the bottom left to begin.

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27) Scroll to the right to see thestart frame and end framechoice for the crane. Thisallows you to specify whichbays the crane is located in.

28) You can also specify whichaisle the crane is located in.The aisles are referenced fromthe Along wall that you choseto locate the crane along. Theaisle is considered to be thedistance from the along wallto the centerline of the firstinterior column. If yourbuilding has more than oneinterior column the next aislewould be from centerline tocenterline of interiorcolumn.

29) Once you have specified thelocation of the crane andwhich aisle it is in you shouldscroll to the right and clickproperties.

30) If you receive this warningmessage you should make anote to go to the FramesSchedule and change yourinterior columns to 3 Platemembers. VP cannot attach abracket for crane support to atube column. This will onlyhappen if you make interiorcolumns Tube.

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Crane Runway Data31) Once you have clicked the

properties button you will seethe Crane Runway Datascreen.

32) From this window you caninput the top of rail as14/0/0 and all of the clearancevalues.

33) Notice the radio buttons forspecifying the bridge span, forthis example we will use holdbridge span and right. Thiswill make it easier because theinterior column will most likelybe 8”-10” deep, therefore wecan estimate 4” plus thedistance to the centerline ofthe rail to be around 1’-3”total.

34) Now click the crane beamdata tab.

Remember that the clearances at the sidewall column are estimated until the VPC Run iscomplete. At that point we can check the actual depth of the sidewall column, and make clearanceadjustments if necessary. Notice this screen is oriented starting at the along wall going intoaisle#1 to the IC.

35) Now click the cranebeam data tab.

36) Click on the ShapeDropdown menu to pickyour Crane Beam Shape.For our example we will usea Wide Flange withChannel.

37) Click Design CraneBeam. You will see theDesign of Crane BeamCriteria box.

38) Make any changesneeded and click ok.

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39) The Note Editor appearsshowing the crane beamsize that will be necessaryfor the cranespecifications you haveinput.

If you have questions about thisdata please contact VP.Otherwise click OK

40) Now you will see theBeam and Channel sizefilled in automatically.

41) VPCommand will notinclude the price andweight for crane beams.

42) The crane rail is not byVP and should be suppliedby the crane manufacturer.Click OK and OK to exit thescreen.

43) Your building shouldhave generated the cranebrackets and bracing asshown in the picture below.

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Bracing at the interior columns.The system will add thebracing for the exteriorwalls, yet bracing needs tobe added in the samebrace bay as the roofbracing in the interior.There are two options: firstto brace from the cranebeam up to the roofbracing, and second tobrace from the ridge to thefoundation on the interiorcolumns. For our examplewe will do option #1.

44) OpenBracing/Locations/Shapename/Roof A, then doubleclick on Roof A.

45) At the top of the BracingLocations screen, click theBracing at InteriorColumns check box, StartFrame at line 3, EndFrame at Line 4, andStart/End Col Location at0/0/0. When completeclick on the Insert a Rowbutton.

46) When you now look atthe Bracing Locationsscreen, you will see thebracing that was added atthe bottom. Highlight thenumber in front of the item,and then click on the BreakLocations button.

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47) When looking at theBracing Tier Locationsscreen, you can affect theBreak points of the Bracing.We want to remove theBracing from the bottom ofthe Columns to the CraneBracket, so that the loadinggoes back into the roofbracing. Click off the X inthe Break column for Row1.

48) Once you do that, aWarning will appear. In ourcase, this is a validsituation, so click the Yesbutton.

Note: If you got this anyother time, and wereunsure of what the affectswould be, then click No,and verify with a BuilderSupport person.

49) After clicking Yes at thewarning screen, then clickOK out of the next twoscreens.

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Your project should look likethis.

Reminder!!!Change Interior columns to 3 Plate members.If you have not changed the interior columns to 3-plate, do so at this time using the Frames /Schedule.

Deflection ConditionsAfter the crane is added VPCommand will automatically hold certain deflections on yourframes according to the type of crane you add to the building.

50) If you go to Loading /Loads and Codes, noticeVPCommand hasautomatically changedthe horizontal deflectionrequirements for thePrimary Frames, if youhave a more strictdeflection requirementadd it in the DeflectionLimit Override. Neverchange the DeflectionLimit Override unless youknow it is greater thanthe VP or Building codestandard, if there is aquestion, ask the engineerof record on the project.

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51) Once complete yourcan Price and Designyour building byselecting Run/Run All.

52) VPC PlotNow you can go into VPC Plot and insert aFrame cross section. By printing out thedrawing you can see if the clearances youhad input will work. The crane clearancesare shown in the upper right corner ofthe frame cross section. There is also acrane data drawing that you can insertthat shows the crane type detail for any VPsupported crane condition.

53) Pricing ReportOnce you have determined allof the crane information thatwas input is correct you cancheck the pricing report. Theprice of the crane bracketwill be included in the price ofthe frame it is attached to. Thecrane runway beam that wasentered will be priced in theframes category on the reportbut is just below the primaryframes pricing section.

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54) Making ChangesIf you find that you haveinterference you can go backto the VPCommand BuildingEditor and revise any cranedata you had input. Save andre-run the job and check yourclearances again.

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Crane System Limitations, Guidelines, and Considerations

Following are some considerations when using this option.

General

1) 5 Aisles per Building (Max.)a) 3 aisles or more.

i) Loading can become a problem when 3 or more aisles are used on some buildingsand portal frames, portal braces or partial height rod bracing is used. Contact theService Center.

2) 2 Cranes per Aisle (Max.)3) Crane runways must run perpendicular to frames.

a) No cranes parallel to frames in this version.4) Supporting members can be built-up 3-plate for interior columns, exterior columns or

rafters.a) Tube Columns or Turned Interior Columns (as end posts) will not work.b) Do not use gage members even though VPC allows the use of them, such as P&B

endwalls etc.5) Crane Beams must be sized by the supplier, if beam is NBVP.

a) VP Service Center will provide sizes if “By VP”.6) Roof Height Change Frames with endposts directly over (above) the interior column of the

lower frame will create a problem with the bracket on the lower frame.a) Move the upper end post off the lower column location.

7) VPC will only consider VP Standard Deflection limits, which is H/100 for A, B & C cranes.a) If the building code specifies E case deflection criteria it will not be auto-generated.

This will have to be input as a user load case and will require Service Center support.b) If you have special deflection requirements, you must create load cases that represent

the requirements. Call the Service Center for assistance.8) Bracing should generally be broken at bracket locations.9) All crane ties are manually added and extra money must be included in the price for the

crane ties.10) Note #9 is missing from Crane Data 1-1. It is not required. Ignore it.11) Column webs are not checked for shear due to crane bracket load. Consult with your

Service Center.12) If column flanges are not as wide as the bracket flange, Interactive Frame design will be

required. Add a note to the IA designer requesting a minimum flange width on the column.13) VPCommand is currently limited to 400 load cases. Consult with your service center.14) Maximum column bracket load is 55 kips.15) Maximum column bracket length is22”

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Top Running Cranes1) Bracket Supports

a) Crane Bracket segments will not be generated if greater than 7 feet from a columnor raftersegment or15 ft if a

boltedunder-

hung isused.

2) Independent Crane Columnsa) VP Command will put the lateral loads on the main frame column and create the

load combinations for auxiliary columns.b) VPC will not create or design the actual auxiliary column.

Service Center Assistance will be needed for the size and price.The price is to be added to additional prices. Get from Service Center.

3) Stepped Crane Columnsa) VP Command will put the load on the frame column and create the load

combinations for stepped columns.The frame will have to be sent to VP for IA Frame design.

b) Step Column with Fixed Base option does not automatically fix the base of theaffected columns.

Service Center Assistance is required for this option.c) Fixed Base plates, and step plates are not included in frame pricing from I/A

Frames.Service Center Assistance is required for this option.

Under-hung Cranes1) The support beam will have to be chosen from the available shapes.

a) The “S” shape with or without channel should be used to allow the wheels to run onthe bottom flange.

b) The size must be gotten from the supplier or from VP.2) The details will not show the braces for the lateral support of the beam.

a) The cost will have to be added in Additional Pricing in VPC.b) Get the size and price from your PDM at the Service Center.c) Rafter stiffeners for under-hung brackets default to full depth.

3) Bracket type – Flexible or Rigid connectiona) Rigid Connections are used when the bracket length is less than 12”.b) Flexible connections can be used for brackets up to 5’ in length.c) Flexible connections require kickers that are not included in the VPCommand

pricing and must be obtained from your Estimating Department.Monorail Cranes

1) Crane data for monorail crane systems is not included with VP Command. Toapproximate a monorail crane use the following procedure:a) Insert an under-hung crane with the correct capacity and a bridge span of 1 footb) Change the crane type to monorailc) On the specifications screen, change the max wheel load to the trolley weight plus

the capacity in poundsd) OK off the crane schedule screen.e) Insert the monorail crane location and adjust the left location to locate the monorail.

2) The support beam will have to be chosen from the available shapes.a) The “S” shape with or without a channel should be used to allow the wheels to run

on the bottom flange.3) This option works if the information is input correctly

Type Max Load (k) Max Length (in)Hot Roll Column Bracket 55 20Three-plate Column Bracket 55 22Three plate Welded Under-hung

46 12

Three plate Bolted Under-hung

46 120