Explain the precautions to be taken when making double connection ...

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Explain the precautions to be taken when making double connection in steel erections.
 
  What will be an ideal response?

Question 2

What are the precautions that should be taken during multiple-lifting procedures in steel erection?
 
  What will be an ideal response?

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Answer to Question 1

Such connections are made when two structural members on opposite sides of a column web are connected by sharing common connection holes for the connection bolts. At least one bolt with a wrench-tight nut must remain connected to the first member to secure that member and to prevent the column form being displaced.

Answer to Question 2

Multiple-lifting procedures are to be undertaken in ways that reduce overhead exposure and operator fatigue and that eliminate improper, unsafe work practices. Components of the multiple-lift rigging assembly must be designed and assembled with a maximum capacity for total assembly and for each individual attachment point.

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Gracias!

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