SPREADER BAR DESIGN WITH LUGS TOP AND BOTTOM v.02

COMPANY: PROJECT:

	kips	Total load, includes the weight of vessel, trays, insulation, piping, rigging, etc. TIP: use 10 kips as initial input value, see examples in Pre-Designed Lugs below
	deg	Angle of the left sling. Use the smallest sling angle if CG is off center
	in	Horizontal distance, bearing to bearing on a duplex crane hook
	in	Distance from the CG to the top left lug
	in	Distance from the CG to the top right lug
	in	Distance from the centerline of the bar to the centerline of the top lugs. See "A" in Pre-Designed Lugs
	in	Distance from the CG to the bottom left lug
	in	Distance from the CG to the bottom right lug
	in	Length of the spreader bar, overall

SHAPE:

	SELECT: Pipe, Square Tubing, Beams(non-compact/compact with lengths < Lu)
	Note: Lu for the beams in the lookup table is based on Fy = 36 ksi (See Lu in the HELP file)

	lbs/ft	Weight per foot for structural member
	in	Radius of gyration, r (use ry for beams) See help file.
	in^2	Cross-sectional area of metal, A
	in^3	Section Modulus, Sx
	in^4	Moment of inertia, Ix
	ft	Lu (This input value is required for beams only, enter 1.00 for pipe and tubes)
	ksi	Yield stress (Fy), Mild steel = 30 ksi, A36 steel = 36 ksi
		Impact Factor, I.F., Recommend using a minimum of 1.8

Result:

OUTPUT:

	in	Distance, CG to top left lug for zero moment due to angle of top sling. Reenter as input
	in	Distance, CG to top right lug for zero moment due to angle of top sling. See help file
	in	Distance from centerline of the left lug hole to bearing on the hook
	in	Distance from centerline of the right lug hole to bearing on the hook
	in	Vertical rigging height from centerline of top lugs to bearing on hook
	deg	Angle of the right sling
	kips	Tension in the top left inclined sling
	kips	Tension in the top right inclined sling
	kips	Compression in the bar due to the influence of the slings
	kip-in	Moment due to the deflection of the bar due to self weight
	kip-in	Moment due to compression force and the offset top lugs. See Help file.
	kip-in	Moment due to the self weight of the bar
	kip-in	Net bending moment in the bar
	ksi	Axial stress, actual , fa
	ksi	Axial stress, allowable, Fa
	ksi	Bending stress, actual, fb
	ksi	Bending stress, allowable, Fb
		Combined stress check, must be less than 1.00. Includes impact factor I.F.