Select the lightest W section to serve as an axially loaded
column 28 ft long, in a braced frame, with additional lateral
support in the weak direction at mid-height. The load to be carried
is 65 kips dead load and 150 kips live load. Assume the top and
bottom of the column are hinged.
a) Use A992 and indicate first and second choices
b) Use A572 Grade 60, indicating first and second choices
Select the lightest W section to support a uniform distributed
load WD=0.5 kip/ft,
W=1.4 kip/ft in addition to the section self
weight. The element will be simple
supported with a span of 24 ft. Use A36 (Deflection does not
require to be verified).
Select the lightest W10 section. Using Fy=50ksi and
Fu= 65ksi to select trial sizes and check for Gross Section
Yielding and Tensile Rupture. Assume the member is to have two
lines of bolts in each flange. (use ASD method)
Pd - dead load = 225 ksi
Pl - live load = 150 ksi
L - member length = 28 ft
Bolt diameter = 7/8 in
Select the lightest W12 not W10.
For bending only, determine the lightest-weight W-shape
to carry a uniform dead load of 4.5 kip/ft plus the
beam self-weight and a live load of 3.5 kip/ft on a simple
span of 24 ft. Consider only the limit state of yielding and
use A992 steel. Design by (a) LRFD
(1) Select the lightest, rectangular Douglas fir section for the
cantilever beam of15- ft span that will carry a uniform load of 450
lb/ft. [Hint: V max = wL; Mmax = wL2/2]
Select the lightest W shape to support a uniformly distributed
load of 1600 lb/ft ona simple span of 48 ft. Deflection is not to
exceed span/240. Assume a yield stress of 50 ksi. Allowable bending
stress of 22,000 psi.
Select the Lightest weight W-section of A992 steel to serve as a
column 30 feet long and to carry an axial live compressive load of
160 kips. The member is pinned at the top and bottom. The member's
self weight is estimated at 2000 lbs. It is supported at mid-height
in its weak direction,
Select the Lightest weight W-section of A992 steel to serve as a
column 30 feet long and to carry an axial live compressive load of
160 kips. The member is pinned at the top and bottom. The member's
self weight is estimated at 2000 lbs. It is supported at mid-height
in its weak direction. Options: 1.W8x40 2.W10x39 3.W12x45 4.W14x48
5.W14x53 6.W10x45
Using LRFD, select a 30-ft-long W section of A992 steel with a
nominal depth of 10 in (a W12) to support a tensile service dead
load PD=130kand a tensile service live load PL=110k. In addition,
the section is to comply with the slenderness ratio limit from AISC
D1 to prevent sag of the member. As shown in the figure below, the
member is to have two lines of bolts in each flange for 7/8-in
bolts (at least three in a...
1) Select the lightest section to support a axial load (DL=700
kips y LL= 300 kips). The
element is braced, so LX= 22 ft and LY= 12 ft. The end support
conditions are:
a) (Fixed/pinned) and it is specified to use A572 gr. 60. (verify
slenderness and
local buckling)
b) (Fixed/Fixed) and you must use A-36