Under what circumstances crane maximum lifting weight

Members brothers I was engaged in Pallet stackers engineering personnel, will lower the crane lifting weight and arm length and the angle between the horizontal arm and the relationship is how it was. Thank you
Crane ask:
Members brothers I was engaged in bridge engineering personnel, will lower the crane lifting weight and arm length and the angle between the horizontal arm and the relationship is how it was. Thank you
Questions added:
Under what circumstances will the next biggest weight lifting.
Answer:
For electrics tacker crane, in just basic arm (hydraulic telescopic boom fully retracted), 3 m lifting radius (arm to catch the maximum elevation of about 80 degrees depending on the specific model may be), the lifting capacity of the largest can reach the rated maximum lifting capacity, such as 50 tons truck crane can lift 50 tons at this time (may only be in the rear or side loading, can not rotate 360 ​​°). Boom boom elevation elongation or reduction will reduce the lifting capacity of the crane, of course, that is elongated boom while lowering the elevation angle will be greater and reduces the lifting capacity crane. For a 50-ton crane, in a state where all outriggers, not lying on a horizontal state of the crane (heavy afford overturn, etc., may result in an accident).