Introduction:
All directly welded parts to the pressure parts like lifting lugs, support lug, trunnion etc. are need to be checked for WRC 107/537. All related calculations are carried out in PV Elite once given proper inputs. In some cases, it is not possible to build such directly welded parts in PV Elite due to software constrain. For example, adding lifting lug on top dish end of vertical equipment is not possible in PV Elite. In those cases, it is mandatory to perform WRC calculations by any other means. This article will help to perform such calculations with analytical solutions followed by CodeCalc calculations.
View lifting lug.xls from MECHANICS 1215 at Inha University. ITEM NO.: PDDTDC = DESIGN OF LIFTING LUGS = - DESIGN DATA -MATERIAL OF LIFTING LUG = MATERIAL OF. Anchor Bolt Design Guide EXAMPLE 3 - Shear Lug Plate Section Design Design a shear lug plate for a 14-in. Square base plate, subject to a factored axial dead load of 22.5 kips, factored live load of 65 kips, and a factored shear load of 40 kips. The base plate and shear lug have f ya = 36 ksi and f c' = 3 ksi. The contact plane between the. The lifting equation establishes a maximum load of 51 pounds, which is then adjusted to account for how often you are lifting, twisting of your back during lifting, the vertical distance the load is lifted, the distance of the load from your body, the distance you move while lifting the load, and how easy it is to hold onto the load.
Litfing lugs -or trunnions- in pressure vessel shall comply with ASME BTH-1 Design of Below-the-Hook Lifting Devices, where the nominal design factor Nd= 2 (min.) for category A. Regards RE: Does design of lifting lug have some standard practice? The User is to Please note this Lifting Lug Design Spreadsheet uses and references the DESIGN FACTORS given in FRAME LIFTING LUG SHACKLE Type & Size The information on this sheet is based on Crosby Shackles both Forged and Alloy, Confirm with Vendor Type being USED! Lifting lug Info DESIGN LOAD PER LIFTING LUG Ph = DESIGN LOAD PER LIFTING LUG.
Inputs:
Consider an equipment with top 2:1 ellipsoidal dish end with directly welded lifting lugs. All necessary input data is given below.
Solution:
To consider the maximum force acting on equipment, vessel is considered to be lifted from horizontal position to vertical. At all lifting positions forces acting on lifting and tailing lugs are calculated as given below and maximum of acting force is taken for the analysis.
Lifting lug forces:
Maximum transverse load per lug PT = P cosθ / N
Maximum longitudinal load per lug PL= P sinθ / N
Where, N = number of lugs
Tailing lug forces:
Maximum radial load on a lug PR = T sinθ
Maximum longitudinal load on a lug fL= T cosθ
Lifting Lug Design Handbook Pdf
Therefore, 304.7kg force is taken for WRC analysis and its components acting on lug are calculated as given
Thus after calculation of forces and moments acting on lifting lug, WRC 107/537 analysis is carried out in CodeCalc in following steps