Description
Davit Arm Calculation (Moss Method)
Engineering Spreadsheet — Instant Download
What This Spreadsheet Does
Designs vessel davit arms using the methodology from Dennis Moss’s Pressure Vessel Design Manual — the industry-standard reference for vessel davit design. Used for manway covers, internals handling, and maintenance lifts on pressure vessels.
What’s Inside the Excel File
- Inputs — davit pipe size, arm length, lift load, mast height, pivot geometry, material grade
- Bending stress in davit arm under lift load
- Combined stress at critical sections
- Deflection of arm tip
- Pad and base connection reactions on vessel shell
- Utilization ratio against allowable
Who This Is For
- Pressure vessel design engineers
- Mechanical engineers on vessel manway and internals access
- EPC mechanical teams on Oil & Gas process vessels
- Vessel manufacturers and detailers
Codes & Standards Referenced
- Moss — Pressure Vessel Design Manual (davit arm methodology)
- ASME VIII Division 1 — pressure vessel principles
How It Works
| 1 | Purchase — secure payment |
| 2 | Download — instant Excel access |
| 3 | Enter Values — davit geometry and lift load |
| 4 | Get Results — stress, deflection, pad reactions |
File Format & Compatibility
Microsoft Excel (.xlsx). Opens in Excel 2016+, Excel 365, Google Sheets. No macros, no locked cells.
What You Get After Payment
- ✅ Instant download (also emailed)
- ✅ Lifetime access
- ✅ Engineer email support
- ✅ 7-day refund if file fails to open
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Frequently Asked Questions
Manway davits or full vessel handling?
Primarily manway and internals davits. For full vessel erection, see our tailing lug and vessel erection sheets.
Does it cover horizontal vessel davits?
The Moss method is most commonly applied to vertical vessel davits but the principles transfer.
Custom version needed?
Request a custom quote.
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