Transcript No Slide Title

Likus Group
Matt Berrell
Justin Disney
Anthony Godfrey
Philip Reale
Gwyneth Smith
Lisa Smith
Device Weight
•
•
•
•
24’ Framing x 2.252 lb/ft = 54 lb.
Winch = 16 lb.
2-Bar system = 12 lb.
Total Weight ~ 72 lb.
Electrical Power Needs
• 12 VDC x 90 Amps = 1080 Watts.
• Electrical controls come standard with
winch.
Frame Layout
Frame Layout
Fatigue Analysis
Roller FEA
Constraints
Results
Cold Rolled Steel
Young's Modulus
29000 ksi
Yield Strength
23925 psi
Maximum Stress 700-1200 psi
Hook System
Constraints
Results
Aluminum
Young's Modulus
10005 ksi
Yield Strength
4060 psi
Maximum Stress 850-1150 psi
Beam Analysis
• Using 1.5x1.5x.125
square tubing
• stress ~ 700 psi
• strain ~ .001 inch
• yield 29000 ksi
• safety factor 41
Device Weight
•
•
•
•
24’ Framing x 2.252 lb/ft = 54 lb.
Winch = 16 lb.
2-Bar system = 12 lb.
Total Weight ~ 72 lb.
Moment Analysis
35 lbs
20 lbs
10 lbs
86 in
200 + X lbs
Results
1 Tier
2 Tiers
3 Tiers
4 Tiers
Moment of Scaffolding Moment of Person
Allowable Weight of Hoist
(ft-lb)
(ft-lb)
(With Person Climbing) lb (Without Person Climbing) lb
465.83
300.00
110.56
310.56
788.33
300.00
325.56
525.56
1110.83
300.00
540.56
740.56
1433.33
300.00
755.56
955.56
Safety Analysis
• The winch meets hoist safety guidelines of
5:1.
• Tipping analysis allows for a safety factor
of 2.5:1 at 3 tiers.