An adaptable chassis for accommodating network devices, comprising: a first chassis structure including a power supply, side walls (110,112) to receive at least one component sled, flanges (140,142), a power distribution board and a first bus structure at a rear end of the first chassis structure; a second chassis structure including side walls (150,152) defining an open front end to receive at least one component sled, a top wall, a power connector to obtain power from the power supply; the adaptable chassis characterized by the second chassis structure including tab members (180,182) to engage the flanges (140,142) of the first chassis structure; wherein the first chassis structure and the second chassis structure are slidably engaged with each other, the top edge of the sidewalls (150,152) of the second chassis structure including protruding tabs that provide a guide for the first chassis structure to rest on the top wall of the second chassis structure, a back stop member extending from the rear end of the top wall, such that the back stop member is configured to prevent the first chassis structure from sliding off the end of the top wall when the first chassis structure and the second chassis structure are slidably engaged with each other; and by the first bus structure comprising a first bus bar structure and a first vertical bus bar extending over the height of the first chassis structure; said first bus structure including a horizontal support having one end attached to the power distribution board, and the first vertical bus bar attached to the opposite end of the horizontal support at a connection point, is connected with a second vertical bus bar of the second chassis structure by engaging the connection point with a connection structure of the second chassis structure. a first chassis structure including a power supply, side walls (110,112) to receive at least one component sled, flanges (140,142), a power distribution board and a first bus structure at a rear end of the first chassis structure; a second chassis structure including side walls (150,152) defining an open front end to receive at least one component sled, a top wall, a power connector to obtain power from the power supply; the adaptable chassis characterized by the second chassis structure including tab members (180,182) to engage the flanges (140,142) of the first chassis structure; wherein the first chassis structure and the second chassis structure are slidably engaged with each other, the top edge of the sidewalls (150,152) of the second chassis structure including protruding tabs that provide a guide for the first chassis structure to rest on the top wall of the second chassis structure, a back stop member extending from the rear end of the top wall, such that the back stop member is configured to prevent the first chassis structure from sliding off the end of the top wall when the first chassis structure and the second chassis structure are slidably engaged with each other; and by the first bus structure comprising a first bus bar structure and a first vertical bus bar extending over the height of the first chassis structure; said first bus structure including a horizontal support having one end attached to the power distribution board, and the first vertical bus bar attached to the opposite end of the horizontal support at a connection point, is connected with a second vertical bus bar of the second chassis structure by engaging the connection point with a connection structure of the second chassis structure.