The document discusses different types of connections used in steel structures. It describes connections as structural elements that join members like beams and columns. The main types of connections discussed are riveted, bolted, and welded connections. Riveted connections use round steel bars called rivets with heads on both ends. Bolted connections fasten members together using bolts that can be loaded in tension, shear, or both. Welded connections primarily join members using welds, with groove welds being the most reliable. The document provides advantages and disadvantages of each type of connection and notes that connections allow the different steel members to function as a single composite unit.

1. Connections in
steel structure
Presentation by: Abid Qayum
Reg. no: SU-13-01-079-008
Sarhad University of Science and Information
Technology (Peshawar)

2.  It always seems
impossible until its
done.
 We have two ears and
one mouth so that we
can listen twice as
much as we speak.
Nelson Mandela Epictetus

3. Introduction
 Connections are structural elements used for
joining different members in steel framed
structures.
 Steel structure is assemblage of different members
such as “beams, columns” which are connected to
each other usually at member ends that shows one
composite unit.

5. Components of connections
 Bolt
 Weld

6.  Connecting plates
 Connecting angles

7. Classifications of connections
 Riveted connections
 Bolted connections

8.  Welded connections

9. Riveted connections
 Used for very long time.
 Made up of:
Round ductile steel bar called shank having
head at one end.
 The length of the rivet should be sufficient to form
the second head.

10. Installation
 Heating of the rivet.
 Insert the rivet from one end.
 Squeezing the plain end by pneumatic driver round
head.

11. Bolted connection
 Fastened together primarily by bolts.
 Bolts may be loaded in:
Tension
Shear
Both Tension and Shear

12.  The bolting operation is
very silent.
 Bolting is cold process
hence there is no risk of
fire.
 Bolting operation is more
quicker than riveting.
 Less man power is
required in making the
connections.
 If subjected to vibratory
loads, results in
reduction in strength
get loosened.
 Unfinished bolts have
lesser strength
because of non uniform
diameter.
Advantages Disadvantages

13. Welded connection
 Whose composite are primarily joined by weld.
 Welding Notations were developed by American
Welding Society AWS.

14. Types of weld
 Groove weld(more reliable than others).
 Fillet weld(mostly use weaker than groove and
others).
 Plug(expensive-poor transmission of tensile forces).
 Slot (expensive-poor transmission of tensile forces).

15.  It’s economical.
 Provide rigid joints.
 Efficiency is 100 % as
compared to rivets.
 No provision for
expansion and
contraction therefore
greater chances of
cracking.
 Uneven heating and
cooling- member may
distort –may result in
additional stresses.
Advantages Disadvantages

16. Henry petroski
• Science is about knowing; engineering is
about doing.

17. THANK YOU