PROBLEM 05 In the steel structure shown, a 6mm diameter pin is used at C and 10mm diameter pins are used at B and D. The ultimate shearing stress is 150 MPa at all connections, and the ultimate normal stress is 400 MPa in link BD. Note that link BD is not reinforced around the pin holes. a. Determine the largest load P that can be applied at A maximizing the shearing capacity of the pin at C. b. Determine the largest load P that can be applied at A maximizing the shearing capacity of the pins at B and D. c. Determine the largest load P that can be applied at A maximizing the axial capacity of link BD. Front view 18 mm Side view Y mm- 120 mm Top view

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Unit Conversion

Standard units are also called SI units. SI units are used for measuring a physical quantity satisfying certain conditions. There are two types of units: fundamental units and derived units. Fundamental units are physical quantities that are independent, that is, they do not depend on other quantities like mass, length, or time. There are plenty of quantities in our lives which need to be measured and compared. Measuring is the comparison of a particular physical quantity with its reference value. A unit is a measure of a fixed physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.