Does a PB EIFS cladding need control joints?
What will be an ideal response?
Constructed of synthetic materials (EPS, plastic mesh, and synthetic adhesives), EIFS cladding does not shrink.
Hence, control joints are not needed. However, architects often introduce aesthetic joints.
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________ is the concept that a single cell has the genetic program to grow into an entire plant.
Fill in the blank(s) with the appropriate word(s).
PROBLEM 3.73 The design of a machine element calls for a 40-mm-outer-diameter shaft to transmit 45 kW. (a) If the speed of rotation is 720 rpm, determine the maximum shearing stress in shaft a. (b) If the speed of rotation can be increased 50% to 1080 rpm, determine the largest inner diameter of shaft b for which the maximum shearing stress will be the same in each shaft
Analyze and compare two trusses, arched configurations of the Pratt Truss and the Howe Truss in Figures P4.56 (a) and (b), respectively. The trusses have the same depth, length, panel spacing, loading, and supports. All joints are pinned. For each truss, do the following.
a) Compute all bar forces and indicate tension or compression for each force.
b) Determine the required cross-sectional areas for each bar, given an allowable tensile
stress of 45 ksi,
and an allowable compressive stress of 24 ksi. Note that the allowable compressive stress is
lower due to buckling.
c) Tabulate your results showing bar forces, cross-sectional areas, and lengths.
d) Calculate the total weight of each truss and determine which truss has a more efficient
configuration. Explain your results.
e) What other conclusions can you draw from the study?
In a lockout/tagout situation, a personal lock and tag must be removed by _____
A) a supervisor B) a competent person C) a qualified person D) the person who applied them