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Tall Column & Vertical Vessel Mechanical Designs
Published 9/2026
Created by ProjectEngPro Engineering and Project Management
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Level: Intermediate | Genre: eLearning | Language: English | Duration: 20 Lectures ( 3h 44m ) | Size: 2.1 GB
Wind and seismic loading, vortex shedding, longitudinal stress, skirt, base ring and anchor bolt design
What you'll learn
Recognise when a vessel becomes load-governed rather than pressure-governed, and what changes Build the design load cases and combinations, including erection and test conditions Estimate weight and centre of gravity for empty, operating and test cases without missing items Calculate wind load on a column including platforms, ladders and attached piping Build the shear and overturning moment diagram up the height and find the governing course Assess vortex shedding, critical wind velocity and lock-in, and choose mitigation on evidence Carry out equivalent static seismic analysis and know when modal analysis is required Apply the combined longitudinal stress check including the compressive allowable Design skirt, base ring, anchor chair and anchor bolts, and follow the load path into the foundation Plan lifting and erection, and assess settlement, verticality and out-of-plumb columns in serviceRequirements
No structural engineering background is required - shear, moment and base reaction are built up from the start Any mechanical, process or plant engineering background is enough to follow the course Comfortable with basic algebra - the calculations are worked step by step, in full Helpful but not essential: a column general arrangement drawing or datasheet from your own plant No software or purchases needed - no vessel design package or loading code is requiredDescription
This course contains the use of artificial intelligence.
▸ The shell thickness was set by wind, not by pressure.
A short vessel is a pressure problem. Make the same vessel sixty metres tall and it becomes a cantilever carrying its own weight, a wind moment, a seismic base shear, a bank of platforms and a hundred tonnes of trays and liquid - and the internal pressure stops being the thing that sets the wall thickness.
Engineers trained on pressure vessels rarely make that shift cleanly. The consequences are specific: a shell course selected on pressure that fails the compressive stress check on the windward side, a skirt-to-head weld detailed without regard to the moment it has to carry, an access opening cut into a skirt at the exact height where the bending stress is highest, or an anchor bolt pattern sized for uplift against a weight case that quietly assumed the vessel was full.
The failures that follow are not subtle. Columns that resonate in a steady crosswind and shake their platforms apart. Anchor bolts that stretch and go slack. Vessels that arrive on site already damaged because nobody analysed the lift. Foundations that settle differentially and put a column out of plumb by more than the trays will tolerate. And the single worst case in the whole subject - an empty column, not yet insulated, standing through a storm before it is anchored.
This course teaches the mechanical design of tall vertical vessels end to end: the load cases and combinations, wind and seismic analysis, vortex shedding, the longitudinal stress check up the height, skirt, base ring, anchor chair and anchorage design, and the lifting, erection, settlement and verticality work that decides whether the column is straight when it goes into service.
▸ Written where mechanical and civil meet
This subject falls in a gap. The pressure vessel engineer treats wind as an input from someone else; the structural engineer treats the vessel as a mast with a mass distribution. Neither owns the compressive stress in the shell, the skirt weld detail or the anchor chair, which is exactly why those items get missed.
Everything here is taught from the mechanical engineer's side of that gap. You will build the shear and moment diagram up the vessel yourself rather than receive it, size the base ring from bearing pressure, and follow the load path from a gust at the top of the column all the way into the concrete.
Vortex shedding is given a full lesson because it is the mechanism that catches experienced people out. It is taught as a physical process - shedding frequency, critical velocity, lock-in, damping and the mitigation options - with an honest account of which vessels are actually at risk and which are being over-engineered by a conservative check.
Five focused sections, worked through in an afternoon.
▸ What you will master
• Recognise when a vessel stops being pressure-governed and becomes load-governed, and what changes
• Build the full set of design load cases - dead, live, wind, seismic, erection and test - and the combinations that govern each part of the vessel
• Estimate weights and centre of gravity for empty, operating and test conditions, including the items routinely underestimated
• Calculate wind load on a cylindrical vessel including the projected area of platforms, ladders and piping
• Build the wind shear and overturning moment diagram up the height and find the governing shell course
• Assess vortex shedding - critical velocity, lock-in and damping - and judge when mitigation is genuinely required
• Carry out equivalent static seismic analysis, estimate the fundamental period, and know when modal analysis is needed
• Combine pressure, weight and moment into the longitudinal stress check and apply the compressive allowable correctly
• Design the skirt, base ring, anchor chair and anchor bolts, and follow the load path into the foundation
• Handle lifting, transport, erection and out-of-plumb assessment, including the damage that happens before start-up
▸
Who this course is for
Pressure vessel and mechanical design engineers working on columns, towers and tall drums Static equipment engineers reviewing vendor vessel designs for an owner or an EPC Project and package engineers managing the mechanical and civil interface on tall equipment Structural and civil engineers designing foundations and anchorage for vertical vessels Construction, lifting and commissioning engineers planning erection Graduate engineers entering static equipment or plant design rolesHomepage
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