A ladder comprising: a first assembly comprising: a first pair of spaced apart rails , a plurality of rungs extending between and coupled to the first pair of spaced apart rails , a second assembly comprising: a second pair of spaced apart rails , at least one rung extending between and coupled to the second pair of spaced apart rails , a pair of hinges pivotally coupling the first pair of spaced apart rails with the second pair of spaced apart rails such that the first pair of spaced apart rails are selectively positionable relative to the second pair of spaced apart rails in at least a first, a second and a third position; a top cap coupled to the first pair of spaced apart rails , wherein when the first and second pair of spaced apart rails are in the first position, the second pair of spaced apart rails do not contact the top cap , and wherein, when the first and second pair of spaced apart rails are in the second position, each rail of the second pair of spaced apart rails engages one of a pair of channels formed in the top cap ; characterised in that each channel of the pair of channels comprises a bottom surface and a pair of side surfaces formed in a rear face of the top cap , whereby when the first and second pair of spaced apart rails are in the second position each rail of the second pair of spaced apart rails is at least partially nested in a respective one of the pair of channels formed in the top cap such that each rail of the second pair of spaced apart rails contacts the bottom surface and is engageable with the pair of sides surfaces for lateral support. a first assembly comprising: a first pair of spaced apart rails , a plurality of rungs extending between and coupled to the first pair of spaced apart rails , a first pair of spaced apart rails , a plurality of rungs extending between and coupled to the first pair of spaced apart rails , a second assembly comprising: a second pair of spaced apart rails , at least one rung extending between and coupled to the second pair of spaced apart rails , a second pair of spaced apart rails , at least one rung extending between and coupled to the second pair of spaced apart rails , a pair of hinges pivotally coupling the first pair of spaced apart rails with the second pair of spaced apart rails such that the first pair of spaced apart rails are selectively positionable relative to the second pair of spaced apart rails in at least a first, a second and a third position; a top cap coupled to the first pair of spaced apart rails , wherein when the first and second pair of spaced apart rails are in the first position, the second pair of spaced apart rails do not contact the top cap , and wherein, when the first and second pair of spaced apart rails are in the second position, each rail of the second pair of spaced apart rails engages one of a pair of channels formed in the top cap ; characterised in that each channel of the pair of channels comprises a bottom surface and a pair of side surfaces formed in a rear face of the top cap , whereby when the first and second pair of spaced apart rails are in the second position each rail of the second pair of spaced apart rails is at least partially nested in a respective one of the pair of channels formed in the top cap such that each rail of the second pair of spaced apart rails contacts the bottom surface and is engageable with the pair of sides surfaces for lateral support. <EOS>