An extendable conveyor for conveying articles, said conveyor comprising: a base unit including a fixed base unit section for being positioned onto ground and a mechanically extendable base unit section, which is adjustably positionable incrementally between a fully nested position within the fixed base unit section and a fully extended position telescoped forwardly from the fixed base unit section; at least one mechanically extendable conveyor section (3a-c) coupled to the mechanically extendable base unit section, wherein the at least one mechanically extendable conveyor section (3a-c) is adjustably positionable incrementally between a fully nested position within the mechanically extendable base unit section and a fully extended position telescoped forwardly from the mechanically extendable base unit section; and a conveying surface for conveying articles extending at least partially on an upper side of the fixed base unit section, the mechanically extendable base unit section and the at least one mechanically extendable conveyor section (3a-c), wherein the mechanically extendable base unit section and the at least one mechanically extendable conveyor section (3a-c) are configured such that extension of the mechanically extendable base unit section from the fixed base unit section is independent of extension of the at least one mechanically extendable conveyor section (3a-c) from the mechanically extendable base unit section; wherein the fixed base unit section comprises a support structure (12, 13; 76, 77; 106, 107) for supporting the mechanically extendable base unit section at least in the fully extended position, wherein the support structure (12, 13; 76, 77; 106, 107) includes a fixed bearing surface (13; 77; 107) for supporting the mechanically extendable base unit section in the fully extended position characterized in that: the support structure (12; 13; 76; 77; 106; 107) comprises a dynamic bearing (12; 76; 106) for supporting the mechanically extendable base unit section at positions of the mechanically extendable base unit section between the fully nested position within the fixed base unit section and the fully extended position telescoped forwardly from the fixed base unit section, the support structure is configured such that the dynamic bearing (12; 76; 106) can be moved from a supporting position to a rest position, the dynamic bearing (12; 76; 106) being in the rest position, when the at least one mechanically extendable conveyor section (3a-c) is in the fully extended position. a base unit including a fixed base unit section for being positioned onto ground and a mechanically extendable base unit section, which is adjustably positionable incrementally between a fully nested position within the fixed base unit section and a fully extended position telescoped forwardly from the fixed base unit section; at least one mechanically extendable conveyor section (3a-c) coupled to the mechanically extendable base unit section, wherein the at least one mechanically extendable conveyor section (3a-c) is adjustably positionable incrementally between a fully nested position within the mechanically extendable base unit section and a fully extended position telescoped forwardly from the mechanically extendable base unit section; and a conveying surface for conveying articles extending at least partially on an upper side of the fixed base unit section, the mechanically extendable base unit section and the at least one mechanically extendable conveyor section (3a-c), wherein the mechanically extendable base unit section and the at least one mechanically extendable conveyor section (3a-c) are configured such that extension of the mechanically extendable base unit section from the fixed base unit section is independent of extension of the at least one mechanically extendable conveyor section (3a-c) from the mechanically extendable base unit section; wherein the fixed base unit section comprises a support structure (12, 13; 76, 77; 106, 107) for supporting the mechanically extendable base unit section at least in the fully extended position, wherein the support structure (12, 13; 76, 77; 106, 107) includes a fixed bearing surface (13; 77; 107) for supporting the mechanically extendable base unit section in the fully extended position the support structure (12; 13; 76; 77; 106; 107) comprises a dynamic bearing (12; 76; 106) for supporting the mechanically extendable base unit section at positions of the mechanically extendable base unit section between the fully nested position within the fixed base unit section and the fully extended position telescoped forwardly from the fixed base unit section, the support structure is configured such that the dynamic bearing (12; 76; 106) can be moved from a supporting position to a rest position, the dynamic bearing (12; 76; 106) being in the rest position, when the at least one mechanically extendable conveyor section (3a-c) is in the fully extended position.