BASIC CRANE SET UP

• A cranes capacity is different over the Sides than it is over the Front or Rear.
• There is a difference in capacity if outriggers are extended. Fully Extend Outriggers (unless
  charts have ratings for other settings).
• Pads 3 times the size of the floats.
• Wheels Off the ground (just enough for clearance).
• Barricade the entire swing radius and ensure NOBODY is within the swing radius while in use.
  

RADIUS

• Increasing the radius generally reduces the total capacity

BOOM ANGLE

• Is the angle of the boom to the horizontal.
• Booming up reduces radius, increases boom angle, and generally increases capacity. Booming
  down increases radius, decreases boom angle, and generally decreases capacity.

TWO-BLOCKING

• A condition when the ball or load block comes in contact with the sheaves at the tip.
• This could cause the rope to break causing dynamic unloading which will drop the load and
  damage the crane.

DYNAMIC LOADING

• Dynamic loading can dramatically effect the stability of the crane and is typically caused by rapidly
  accelerating or stopping a load.

SIDE LOADING

• Typically cause by not having the tip of the crane over the load when trying to hoist or when there is a rapid
  start or stop of the swing.
• This can cause sever structural damage to the boom and eventually cause failure of the crane boom.

EFFECTS OF WIND
From the Back

• Effect of wind on the load increases the load radius and reduces capacity.
  Forward stability is the critical consideration when the wind is from behind the
  boom.
• It has same effect as adding load to the hook.

From the Front

• Effect of the wind on the load reacts at the boom tip by creating a backward tipping load.
• Backward stability is the critical factor when the wind is from the front, particularly when the boom
  is at or approaching maximum boom angle.

From the Side

• Boom Strength is most affected when the wind is from the side.

SAFETY REMINDERS – RIG IT RIGHT THE FIRST TIME-EVERYTIME!