00 Steel Drawings Fundamentals CIVL02C03 Fall2010 Rev01

8/8/2019 00 Steel Drawings Fundamentals CIVL02C03 Fall2010 Rev01

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British University in Egypt BUECivil Engineering Department


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Civil Engineering DrawingCIVL 02 C 03


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Dr. Amr Helmy

Associate Professor Room 204 Building AExt. 1453 [email protected]

Civil Engineering Department,Faculty of Engineering,British University in Egypt .


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Fundamentals of

Steel Structures Drawings


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Table of Content1. Rolled and Light steel Sections

2. Portal Frame Components and Erection

3. General Layout Plan View

4. Connections

5. Welding vs. Bolting

6. Cladding7. Bracing Systems



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Rolled steel sections Light steel sections

Fabricated structural sections


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Steel sections (symbol and convention)

H.W. Draw all the rolled steel sections shown using 1:10 scale


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Portal frame1. Steel portal frames are capable of spanning large

distances. They are used in the construction of factories and warehouses.

2. Wall and roof bracing is normally provided inselected bays, often at the end of buildings.Additional vertical column or beam sections maybe introduced at the gables (wind posts) tosupport cladding on end walls.

3. Roof beams (rafters) and columns are usuallyfabricated from rolled steel sections, whilepurlins and cladding rails are usually in lightsteel sections.

4. Cladding materials include built-up claddingsystems (as shown), composite cladding panels,and masonry.


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Portal frame


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Portal frame


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Portal frame


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Portal frame


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Portal frame


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Portal frame erection


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Portal frame: general layout


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ConnectionsColumn base connection1. There are a variety of ways of connecting column base

plates to concrete ground structures.

2. One common method involves casting bolts, via boltpockets, into the concrete. Bolts are able to move slightlywithin the pockets to provide horizontal adjustment of thebase plate before grouting the gaps around the bolts.

3. Vertical adjustment is by shims or packs inserted beneaththe base plate and the top surface of the concrete.


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ConnectionsHaunched beam to column connection1. Haunched connections are used where there is a need to achieve high moment transfer.2. The haunch locally increases the effective depth of the section.3. Beams are attached using multiple pairs of bolts through an endplate.4. Haunched connections are common in portal frames.


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ConnectionsEnd plate beam to column connection1. Endplate connections have a single plate welded to the end of the beam, which is bolted to the

column using two or more bolts arranged in pairs or connected using site weld.

2. When connections are made to hollow section columns, it is not possible to install conventionalnuts onto the ends of bolts inside the section. Specially threaded holes may be used.


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ConnectionsFin plate beam to column connection1. Fin plate connections are fabricated by welding a single plate to the column (or to the

beam). Beams are normally attached using two or more bolts.


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ConnectionsEnd plate beam-to-beam connection1. The end plate beam-to-beam connection is similar to the beam to column endplate

connection. However because the top flanges of the beams support floors or roof structuredirectly, the top flange at the end of the incoming beam has to be notched.


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ConnectionsPinned tube connection1. The ends of tubes can be profiled and

welded, or can be bolted using simple fin-plates.

2. Single fin-plates may be welded to each of the members or, where eccentricities needto be minimised, a single fin-plate on onemember may be designed to locatebetween a pair of fin-plates on the other (asshown).


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Connections: Splices1. The components (members) are usually made of one continuous member , however long

members can be fabricated in several sections. These sections are normally connected toeach other on site using either site-weld or bolts. This connection is called a splice.

Column SpliceSite WeldColumn SpliceSite Weld Column SpliceBolted Connection Beam SpliceBolted Connection


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WELDING

Advantages:

Eliminates need for punching ordrilling. Simplifies complicated joints.

Disadvantages:

Greater level of skill is required forwelding than bolting More expensive than bolting. Weld inspection is required and isexpensive.

BOLTING

Advantages:

Easy method of connectingmembers on the site. Field-bolting is cheaper than

field-welding.

Disadvantages:

Requires drilling or punchingthrough all plies.

Connections: Welding vs. Bolting


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WELDING

Connections: Welding vs. Bolting

BOLTING


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Light steel cladding

Light steel decking

(used for composite slabs)

Built-up systemwith liner sheet

Built-upsystem withliner trays

Compositepanel system


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1. Chevron bracing (inverted V bracing) is a modified formof a braced frame which allows for access ways to pass.This system allows the architect to consider placingdoorways and corridors through the bracing lines on a

building.2. Chevron bracing is denoted by the dashed-line drawn

between the two center columns. The solid lines indicatethe floor beams and girders.


Vertical Bracing SystemsChevron Bracing

Eccentric brace with typicalbrace to beam connection

Typical floor plan with Chevron bracing Elevation with Chevron bracing


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Vertical Bracing SystemsRigid Frames

Typical floor plan with rigid frame bracing Elevation with rigid frame bracing

Typical rigid(moment)

connection

1. Rigid frames are used when the architectural designwill not allow a braced frame to be used.

2. This type of lateral resisting system generally doesnot have the initial cost savings as a braced framesystem but may be better suited for specific typesof buildings.


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Thank You


00 Steel Drawings Fundamentals CIVL02C03 Fall2010 Rev01

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