Some Interesting Alternatives to the Standard Support Beam Gary Zigmann 11/29/06.

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Presentation transcript:

Some Interesting Alternatives to the Standard Support Beam Gary Zigmann 11/29/06

Industrial Support Beams

YIELD STRESS (σ) - The stress at which a material begins to plastically deform.

Stress/Strain curve

Standard Support Beam W14 x ,000 lb max σ max = 50ksi d = 21in I = 4170in^4 M = in-lb 144in Total weight of beam = 8000 lb

Important Values in Calculating whether or not a particular beam will work. σ = Mc/I = M/S M = Moment (in*lb) c = distance to the centroid of the cross- sectional area. (in) I = Moment of Inertia (in^4) S = Section Modulus (in^3) M = Load*a/2 Load a a

Aluminum T-Slot Yield strength, 35,000 psi Weight per unit length,1.58lb/ft Total weight, 18.6lb Estimated Area, 1.17in^2 Moment of Inertia,.3354in^4 Cost = $65 for a 13ft bar Available at tslotparts.com

HDPE-square stock s = 3.85in Yield strength, 2830 psi Weight per unit length,.0506 lb/in^3 Total weight for 12 ft bar, 108 lb Section Modulus, in^3 Cost = $54 for a 12 bar Available at specialserviceplastic.com s s

Aluminum I-Beam 6061-T6 S3.0x1.637 Yield strength, 40,000psi Weight per length, 0.097lb/in^3 Total weight, 19.4lb Cost = $140 for a 12ft beam Available at onlinemetals.com

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