NAME OF YOUR COMPANY, INC.
5 Story Steel Building
CEN 408 Project NAME – Hospital or Office or???
Diane Freiburger
[Pick the date]
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5 Story Steel Building
TABLE OF CONTENTS
1.0
2.0
3.0
GENERAL STRUCTURAL CRITERIA
4
1.1
BUILDING DESCRIPTION ..................................................................................................... 4
1.2
BUILDING CODES AND STANDARDS .................................................................................. 4
1.2.1 State Building Code ............................................................................................ 4
1.2.2 Industry Reference Standards .......................................................................... 4
STRUCTURAL SYSTEMS
4
2.1
FOUNDATIONS .................................................................................................................... 4
2.2
SLABS ON GRADE .............................................................................................................. 4
2.3
FLOOR FRAMING ................................................................................................................ 5
2.4
ROOF FRAMING .................................................................................................................. 5
2.5
COLUMNS............................................................................................................................ 5
2.6
LATERAL FORCE RESISTING SYSTEM ............................................................................... 5
2.7
CLADDING SYSTEM ............................................................................................................ 5
DESIGN LOADS
6
3.1
FLOOR LOADS .................................................................................................................... 6
Dead Load ......................................................................................................................... 6
Dead Load = Self Weight of Concrete System plus 20psf superimposed dead
load (mechanical equipment, partitions, ceilings, finishes, etc…) ............................ 6
3.2
ROOF LOADS ...................................................................................................................... 6
Dead Load ......................................................................................................................... 6
Live Load ........................................................................................................................... 6
Snow Load ........................................................................................................................ 6
Rain Load .......................................................................................................................... 6
3.3
SNOW LOAD........................................................................................................................ 6
3.4
LIVE LOAD REDUCTION ...................................................................................................... 6
3.5
CLADDING AND VENEER LOADS ........................................................................................ 6
3.6
SEISMIC LOADS .................................................................................................................. 7
3.7
WIND LOADS....................................................................................................................... 7
3.8
EARTH LOADS .................................................................................................................... 7
3.9
LOAD COMBINATIONS ........................................................................................................ 7
Student Name
Date
2
5 Story Steel Building
4.0
5.0
6.0
SERVICEABILITY CRITERIA
8
4.1
DRIFT .................................................................................................................................. 8
4.1.1 Seismic Drift ......................................................................................................... 8
4.1.2 Wind Drift .............................................................................................................. 8
4.2
BRICK VENEER SUPPORT DEFLECTION ............................................................................ 8
4.3
FLOOR FRAMING DEFLECTION .......................................................................................... 8
4.4
SLAB FLATNESS AND LEVELNESS ..................................................................................... 8
4.4.1 Slabs on grade .................................................................................................... 8
4.4.2 Elevated Slabs ..................................................................................................... 8
MATERIAL STRENGTHS
9
5.1
CONCRETE.......................................................................................................................... 9
5.2
STEEL .................................................................................................................................. 9
5.3
REINFORCING STEEL ......................................................................................................... 9
5.4
MASONRY ........................................................................................................................... 9
5.5
FROST DEPTH .................................................................................................................... 9
CALCULATIONS
10
6.1
COLUMN DESIGN .............................................................................................................. 10
6.2
BASE PLATE DESIGN ......................................................................................................... 10
6.3
BEAM AND GIRDER DESIGN .............................................................................................. 10
6.4
DRAW A TYPICAL FLOOR PLAN ........................................................................................ 10
6.5
SHEAR CONNECTION ......................................................................................................... 10
6.6
LATERAL SYSTEM ............................................................................................................. 11
Student Name
Date
3
5 Story Steel Building
1.0
GENERAL STRUCTURAL CRITERIA
1.1
Building Description
The proposed building is a 5 story ?? with …
All structural design criteria for the building are based on the building codes and
standards listed below.
1.2
2.0
Building Codes and Standards
1.2.1
State Building Code
All design shall be based on the Massachusetts State Building Code,
(International Building Code 2003, with code amendments), and its
applicable referenced standards.
1.2.2
Industry Reference Standards
American Concrete Institute, “ACI 318-05 Building Code Requirements
for Reinforced Concrete”
American Institute of Steel Construction, “AISC 13th Edition Manual”
American Concrete Institute, “ACI 530-02 Building Code Requirements
for Masonry Structures”
American Society of Civil Engineers, “ASCE 7-02 Minimum Design Loads
for Buildings and Other Structures”
STRUCTURAL SYSTEMS
2.1
Foundations
Foundation design is based on geotechnical report by “EAN DESIGN”, dated Nov
11, 2009. Design assumes spread footings on soil with 4,000 psf bearing
capacity. Soil bearing capacity shall be verified by a PE during construction.
Engineered fill shall conform to the project specifications.
Contractor shall limit monolithic pours to the lengths and areas specified on the
project drawings and/or in the project specifications.
2.2
Student Name
Date
Slabs on Grade
Slabs on grade shall be 4” in thickness, with minimum reinforcement and
composition as shown on project drawings. Contractor shall provide sawcut
control joints within 4 hours of placement of slab, using an early entry saw.
Control joint locations shall be as shown on project drawings or as indicated by
architect.
4
5 Story Steel Building
2.3
Floor Framing
The floor system consists of 2.5” NW concrete on 3” metal deck spanning 8-12?
feet to typical floor beams. The beams span to girders which span to columns.
Using the following loads…
Live Load = 50 psf
Dead Loads:
Concrete + MD = 45 psf
Hung Mech’l = 5 psf
Ceiling = 5 psf
2.4
Roof Framing
Describe
2.5
Columns
Describe
2.6
Lateral Force Resisting System
The lateral system for the … .
2.7
Cladding System
Cladding will consist of a combination of brick veneer and a structural curtain wall
system in portions of the façade. Brick veneer system will have a metal stud
backup wall. Architect shall provide for adequate control joints to control
cracking of veneer and backup wall, per Brick Institute of America standards.
It is assumed in this design that the structural curtain wall system will span
between floor levels (vertically). Curtain wall and connections to the structure
shall be designed by a PE employed by the curtain wall supplier to conform with
the wind and seismic loads.
Student Name
Date
5
5 Story Steel Building
3.0
DESIGN LOADS
3.1
Floor Loads
The following are uniform loads applied to floors. All floors will also be designed
for minimum concentrated loads as per IBC 2003 Section 1607 or ASCE-7 - 02.
Dead Load
Dead Load = Self Weight of Concrete System plus 20psf superimposed
dead load (mechanical equipment, partitions, ceilings, finishes, etc…)
Live Load
Live Load= 50 psf?? uniformly distributed
3.2
Roof Loads
Dead Load
Self Weight of Concrete System plus 20psf superimposed dead load
(mechanical equipment, partitions, ceilings, finishes, etc…)
Live Load
25 psf (not to be combined with snow load)
Snow Load
See section 3.3 below.
Rain Load
(for pitch <1/4” per foot) Design against ponding instability ASCE7-02
Section 8.4
3.3
Snow Load
Basic Snow Load = 30 psf
3.4
Live Load Reduction
Not considered for this project ???.
3.5
Cladding and Veneer Loads
Weight of brick is assumed to be 40 psf.
Student Name
Date
6
5 Story Steel Building
Calculate the Wind and Seismic Base Shear of using ASCE 7-02 (see website). Remember the
base shear is the total lateral loads in kips. …
3.6
Seismic Loads
IBC 2003 Section 1616.0.
Seismic Use Group II
Seismic Performance Category C
Seismic Importance Factor 1.25
Lateral Force Resisting System: Steel Not Specifically Detailed for
Seismic ??
Response Modification Factor, R,??R=3, Cd=3, and Ω=3.
Soil – Site Class D and Fa = 1.4 and Fv = 2.4
Assume Floor and Roof Seismic Dead Uniform Load = 60psf and include
40psf of perimeter wall weight in the Seismic Weight calculation.
Seismic Coefficient: Ss = 0.182 and S1 = 0.052, use Seismic Importance
Factor I = 1.15???
For the Period, use simple formula from Lecture
Draw Response Spectrum for Extra Credit
Calc Base Shear
3.7
Wind Loads
IBC 2003 Section 1613.0.
Main Windforce Resisting System:
Basic Windspeed (3-second gust) = 110 MPH
Exposure Category C
Importance Factor I=1.15
System Design Method: Method I (per ASCE 7-02)
Occupancy Cat = IV ?
Importance Factor, I = 1.15 ??
Lamda = 1.66
Base Shear X = Vwx = ??
Base Shear Y = Vwy = ??
3.8
Earth Loads
Walls retaining earth shall conform to the following:
Provide granular fill as backfill for all retaining walls.
Unevenly backfilled walls designed for an equivalent fluid pressure of 65
psf if the wall is supported prior to backfilling; 45 psf if the wall is
unsupported prior to backfilling.
Coefficient of friction for footings and slabs resisting sliding: 0.50
3.9
Load Combinations
Per ASCE 7-02 Section 2.4
Insert all combinations here….
Student Name
Date
7
5 Story Steel Building
4.0
SERVICEABILITY CRITERIA
4.1
Drift
4.1.1
4.1.2
Seismic Drift
IBC 2003 Section 1617.3, ASCE 7-02 Table 9.5.2.8, maximum allowable
story drift of 0.020 times the story height.
Wind Drift
Main building windforce resisting system drift will be limited to 0.0025
times the story height for maximum wind.
4.2
Brick Veneer Support Deflection
Limit deflection for brick veneer support members to span/600.
4.3
Floor Framing Deflection
Live load deflection will be limited to the span/360. Total load deflection
will be limited to span/240.
4.4
Slab Flatness and Levelness
4.4.1 Slabs on grade
Ff=25, Fl=20
To be verified using a profilograph during construction
4.4.2
Student Name
Date
Elevated Slabs
Ff=25, Fl (n/a, see deflection criteria)
Flatness to be verified using a profilograph during construction.
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5 Story Steel Building
5.0
MATERIAL STRENGTHS
5.1
Concrete
Min. 28 day compressive strength f’c=4000 psi
5.2
Steel
??
5.3
Reinforcing Steel
Reinforcing bars: Grade 60 (Fy=60 ksi)
Welded Wire Fabric: Fy=65 ksi
5.4
Masonry
Minimum compressive strength F’m = 1500 psi
Mortar shall be Type M or S
Grout f’c=3,000 psi
5.5
Frost Depth
Bottoms of all footings shall be a minimum 3’-4” below grade.
Student Name
Date
9
5 Story Steel Building
6.0
CALCULATIONS
6.1
Column Design
Determine a typical interior and exterior column here (all 5 stories)…show calcs
by hand or typed. Draw an elevation showing where the splices are located
(simple sketch of how many stories each column is)
6.2
Base Plate Design
Design one Base Plate here…. Show sketch
6.3
Beam and Girder Design
Draw the shear and moment diagram a typical beam typical girder
For extra credit, size a spandrel beam and check deflection for L/600.
Design a typical beam and girder (use wide flange)
6.4
Draw a Typical Floor Plan
Sketch a typical floor plan for discussion….something like this from HW2 but
beam sizes that were calculated.
6.5
show
Shear Connection
Design and detail (draw connection) a typical beam to beam and a beam to
column shear connection.
Student Name
Date
10
5 Story Steel Building
6.6
Lateral System
Describe lateral system (number, braced or moment frames, locations, etc –
show plan of location of lateral system). Draw Elevation of a Typical Frame or
any other way to describe your lateral system.
Student Name
Date
11