ARCH 614 Worth 50 points S2017abn 1 ARCH 614: Practice Quiz 6 Note: No aids are allowed for part 1. One side of a letter sized paper with notes is allowed during part 2, along with a silent, non-programmable calculator. There are reference charts on pages 2-6 for part 2. Clearly show your work and answer. Part 1) Worth 5 points (conceptual questions) Part 2) Worth 45 points (NOTE: The loading type [ex, live, dead, wind...] and sizes can and will be changed for the quiz with respect to the beam diagrams and formula provided. The support condition, section, and bracing for the column can and will be changed.) A wide flange beam of A992 steel (Fy = 50 ksi, E = 29 x 10 3 ksi) is needed to span 32 ft and support uniformly distributed loads of 850 lb/ft of dead load (from materials), the self weight, and 1150 lb/ft of linearly distributed live load. The beam is simply supported with a maximum unbraced length of 11 ft. a) Select the most economical beam based on flexural strength using the available moment chart provided (including self weight). Assume that the dead load will determine the location of the maximum bending moment and superimpose the live load moment at that location. b) Determine the moment of inertia required such that the total [or live load or dead load...] deflection, ignoring self weight, does not exceed 1.25 inches. Assume that the dead load determines the location of the maximum deflection. A W10 x 33 column is 18.5 ft tall of A992 steel (Fy = 50 ksi , E = 29 x 10 3 ksi). The base is fixed and the top is pinned in the weak axis, while the strong axis is considered pinned at the top and bottom (no picture and approximated conditions). The section properties are: A = 9.71 in. 2 , Ix = 170 in. 4 , rx = 4.19 in., Iy = 36.6 in. 4 , ry = 1.94 in. c) If the column is to support 115 kips of dead load and 45 kips of live load, is it adequate for design? Answers – Not provided on actual quiz! a) Mu = 248.3 k-ft, use W14x48 (Mu* > 250.5 k-ft) b) Ireq’d = 927.4 in 4 [Ireq’d-dead = 553.2 in 4 , Ireq’d-live = 374.8 in 4 ] c) Pn = 236 k OK (weak axis governs because Pn-strong = 355 k) A B wD = 850 lb/ft wselt wt wL = 1150 lb/ft 32 ft Disclaimer: Answers have NOT been painstakingly researched.
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ARCH 614 Worth 50 points S2017abn
1
ARCH 614: Practice Quiz 6
Note: No aids are allowed for part 1. One side of a letter sized paper with notes is allowed
during part 2, along with a silent, non-programmable calculator. There are reference charts on
pages 2-6 for part 2.
Clearly show your work and answer.
Part 1) Worth 5 points (conceptual questions)
Part 2) Worth 45 points
(NOTE: The loading type [ex, live, dead, wind...] and sizes can
and will be changed for the quiz with respect to the beam
diagrams and formula provided. The support condition,
section, and bracing for the column can and will be changed.)
A wide flange beam of A992 steel (Fy = 50 ksi, E = 29 x 103 ksi) is
needed to span 32 ft and support uniformly distributed loads of 850 lb/ft of dead load (from materials),
the self weight, and 1150 lb/ft of linearly distributed live load. The beam is simply supported with a
maximum unbraced length of 11 ft.
a) Select the most economical beam based on flexural strength using the available moment chart
provided (including self weight). Assume that the dead load will determine the location of the
maximum bending moment and superimpose the live load moment at that location.
b) Determine the moment of inertia required such that the total [or live load or dead load...] deflection,
ignoring self weight, does not exceed 1.25 inches. Assume that the dead load determines the location
of the maximum deflection.
A W10 x 33 column is 18.5 ft tall of A992 steel (Fy = 50 ksi , E = 29 x 103 ksi). The base is fixed and the
top is pinned in the weak axis, while the strong axis is considered pinned at the top and bottom (no picture
and approximated conditions). The section properties are:
A = 9.71 in.2, Ix = 170 in.4, rx = 4.19 in., Iy = 36.6 in.4, ry = 1.94 in.
c) If the column is to support 115 kips of dead load and 45 kips of live load, is it adequate for design?