! Live load = 100 psf
! Dead load = 25 psf (partitions + MEP)
! Self weight considered on the table formulation
! 4 in. lightweight concrete topping
! 2 in. metal decking (composite)
! 50 ksi yield strength
! Floor system requiring a 3-hour fire rating (f
The Appendix is divided into three parts. The AISC Code of Standard Practice
covers standard communications
through plans, specifications, shop drawings and erection drawings; material,
fabrication, and erection tolerances and quality requirements; contra
Fix the roof securely, either to a continuously
reinforced ring beam on top of the walls, or to
independent supports, which will not fail even if
the walls collapse.
Avoid projecting elements, brittle materials and
heavy materials on wea
of projecting elements such as parapets, water tanks,
non-monolithic chimneys and loose roof coverings.
Outbreaks of fire caused by fractures in chimneys
or breaks in mains supply lines present an additional
While small buildings with timber frame
Winthrop University Hospital
IDEAS PAGE 2
The Ideas Section is a collection of publications that colorfully illustrate the many
possibilities with structural steel.
The first document, Structural Steel Today, presents a series of projects tha
1. Define structural design.
2. Briefly describe the structural design process.
3. Why is it important to take into account deflection
of structural elements during design phase?
4. Outline factors that influence design of beams.
5. Which measures improve
= length of wall
P = 10.1 kN/m length of wall.
If steel posts are placed at 2.5 m centres, each post can
be approximated to a vertical cantilever beam 2.5 m
long, carrying a total distributed load of 10.1 2.5
= 25.25 k
Code of Standard Practice for Steel Buildings and Bridges, March 7, 2000
Construction Industry Organizations
The purpose of this Guide is to provide architects with the tools needed to feel
more comfortable and c
internal diameter of 200 mm and external diameter
of 250 mm carries a compressive load of 600 kN.
Find the maximum permissible eccentricity of
the load if (a) the tensile stress in the column
must not exceed 15 MPa; (b) the compressive
stress must not exc
designer, or architect. The publication
of the material contained herein is not intended as a representation or warranty on
the part of the American
Institute of Steel Construction or of any other person named herein, that this
information is suitable for
Note that the design of the wall is complex if it consists
of a plate of uniform thickness, but if the wall is
thought of as comprising a number of vertical members
cantilevered from the floor, an approach similar to that
for the soil-retaining wall can b
friction (). The angle of friction is the essential property
of a granular material on which Rankines theory is based.
This theory enables the lateral pressure to be expressed as
a proportion of the vertical pressure, which was shown
(before) to depend on
DE S IG NI NGWITH STRUCTURAL
AG UIDE FO RAR CH ITE CTS
American Institute of Steel Construction, Inc.
All rights reserved. This book or any part there
with virtually all structural steel produced in the United States today made from
recycled cars and other steel products, steel offers environmental sustainability for
This Guide was created in response to research gathered by the American Ins
and a combined force of live load plus dead load often called the total
load or TL. The design process starts at the roof and continues down
to the foundation. This is opposite the actual construction which starts
at the bottom and works up. Loads are des
than its width.
2. In the structural framework, the braces will reduce
the effective length to l when the column A-B
is buckling sideways but, as there is no bracing
restricting buckling forwards and backwards, the
effective length for buckling in these d
phenomenon is called buckling and occurs when the
stresses in the rod are still well below those required
to cause a compression/shearing-type failure. Buckling
is dangerous because it is sudden and, once started, is
Although the buckling of
Tributary loading or tributary width is the accumulation of loads that
are directed toward a particular structural member.
Example: Tributary width is 7 ft + 5 ft = 12 ft. If the load is 100 PSF,
the load to the beam would be 12 ft x 100 PSF = 1200 PLF. T
Example: Beam A has 2 sq ft of contributing load on each side (a
tributary load). The load on each sq ft is 100 PSF. Therefore 2 ft + 2 ft
= a tributary width of 4 ft x 100 PSF = 400 PLF along the beam.
Note: Rafters and floor joists have a tri
All triangles have three angles. The sum of these angles always equal
180 degrees. If you know two of the angles you can solve for the third.
Right equilateral triangles have two equal sides and a 90 degree angle.
If you know the length of the two equal s
BEAM OR HEADER
AT EACH END
SPACED AT 12 O.C.
2. LOAD PATH EXAMPLES
UNIFORM LOADS ON RAFTERS AND FLOOR JOISTS
Remember that rafters and floor joists are just small beams with lighter
load requirements. They are usually spa
It is best to treat the two end sections as simple beams.
Standard caSeS of beam loadIng
A number of beam loading cases occur frequently and it
is useful to have standard expressions available for them.
Several of these cases will be found in T