Steel Erection

Question 1

Keys to success

Answer 1

Success starts with bidding process

Question 2

Fabrication Considerations

Answer 2

Economical Fabrication relies on production line approach
Regular nispection
Need confident experiences inspector
be aware of commercial standards
Keep adequate testing as per contract requirements

Question 3

Ordering

Answer 3

Join from foundation to frame

Question 4

Primary Protection Technique

Answer 4

Encapsulation in vapour proof membrane
Coating with sacrificial metal (galv)
Coating with sacrificial paint, overcoating with a protective paint

Question 5

Secondary Protection Techniques

Answer 5

Provide Adjacent scrificial material of lower galvanic properties
INduce hard rust on surface to inhibit corrosion
Providing sufficient thickness of material to guarentee service life

Question 6

Steel Storage

Answer 6

Store in single seperated layers
On an angle to reduce water sitting in beams
Store clear of ground

Question 7

Sling Equalisiation

Answer 7

Critical to safe lifting
COG will always be directly below hook

Question 8

Equalisation Equipment

Answer 8

Equaliser beams
Pulleys
Equalising Triangles
Synchronised Jacks

Question 9

Erection Tasks

Answer 9

Secure Crane info
Check transport of materials
Decide laydown area
Determine crane size
Determine temporary restain systems
Determine parting area if needed

Question 10

Crane Selection

Answer 10

Avoid Maerginal Situations
Consider crane movements in 3D
Understand characteristics of different types
Consider operating surface
Cautious of multi-crane lifts

Question 11

Crane Size Considerations

Answer 11

Jb Lenghts
Max radius
Min radius
Jib angle @ min
Jib angle @max
Clash with existing steelwork
Max Load

Question 12

Multi-Crane Lifts

Answer 12

Reduces ability
2 - 20% download
3 - 33% down rating
4 - 50% downrating

Question 13

Multicrane Setup

Answer 13

Accidental lateral load on boom will result in a failure