crane load

I HAVE SOME QUESTION

WHEN WE APPLY CRANE LOAD IN MY OPINION THERE SHOULD BE FIVE  SITUATION CONSIDERED FOR EACH POSITION OF CRANE WITH LIFTED LOAD

1. VERTICAL WITH IMPACT @ 25% OF LIFTED LOAD ( SIMULATING THE SITUATION WHILE CRANE IS LIFTING LOAD) - NO OTHER LATERAL OR LONGITUDINAL TO BE CONSIDERED 

2. VERTICAL LOAD WITHOUT IMPACT + TRANSVERSE THRUST LOAD( + DIRECTION) WITH 20 % OF (TROLLEY WEIGHT + LIFTED LOAD)

3. VERTICAL LOAD WITHOUT IMPACT + TRANSVERSE THRUST LOAD ( - DIRECTION) WITH 20 % OF (TROLLEY WEIGHT + LIFTED LOAD)

4. VERTICAL LOAD WITHOUT IMPACT + LONGITUDINAL THRUST (+DIRECTION)10 % OF WHEEL LOAD WITHOUT IMPACT   

5. VERTICAL LOAD WITHOUT IMPACT + LONGITUDINAL THRUST (-DIRECTION)10 % OF WHEEL LOAD WITHOUT IMPACT   

BUT SURPRISINGLY MOST OF US USE FOLLOWING FOUR CONDITIONS:

A) VERTICAL LOAD WITH IMPACT + TRANSVERSE THRUST LOAD( + DIRECTION) WITH 20 % OF (TROLLEY WEIGHT + LIFTED LOAD)

B) VERTICAL LOAD WITH IMPACT + TRANSVERSE THRUST LOAD ( - DIRECTION) WITH 20 % OF (TROLLEY WEIGHT + LIFTED LOAD)

C) VERTICAL LOAD WITH IMPACT + LONGITUDINAL THRUST (+DIRECTION)10 % OF WHEEL LOAD WITHOUT IMPACT   

D) VERTICAL LOAD WITH IMPACT + LONGITUDINAL THRUST (-DIRECTION)10 % OF WHEEL LOAD WITHOUT IMPACT   

MY POINT OF ARGUMENT IS THAT NO TWO ACTIONS CAN OCCUR SIMULTANEOUSLY VERTICAL IMPACT AND TRANSVERSE IMPACT SIMULTANEOUSLY  IS A SUCH CONDITION

ANY CAN CLARIFY WHAT SHOULD THE ENGINEERING JUDGEMENT? IS THE CODE  SILENT ABOUT THIS?