A pipelayer machine having a counterweight assembly is provided. The pipelayer machine can include a main body having first and second sides, a first side track provided on the first side of the main body and a second side track provided on the second side of the main body. A side boom can be provided on the first side of the main body. The counterweight assembly can be provided on the second side of the main body and include a counterweight mounting frame. A counterweight can be provided having a first side with an engagement hook extending from the first side. The engagement hook can be used to attach the counterweight to the counterweight mounting frame.

A pipelayer machine is provided. The pipelayer machine has a main body, a boom pivotally connected to a first side of the main body, a hook winch provided on the first side of the main body and a boom winch provided on the second side of the main body. The boom winch and the hook winch can be connected to a structural assembly that positions the boom winch proximate the second side of the main body and positions the hook winch proximate the first side of the main body of the pipelayer machine. The hook winch can be provided in a hook winch frame and the hook winch frame can form a structural member in the structural assembly.

A pipelayer machine is provided. The pipelayer machine has a main body, a boom pivotally connected to a first side of the main body, a hook winch provided on the first side of the main body and a boom winch provided on the second side of the main body. The boom winch and the hook winch can be connected to a structural assembly that positions the boom winch proximate the second side of the main body and positions the hook winch proximate the first side of the main body of the pipelayer machine. The hook winch can be provided in a hook winch frame and the hook winch frame can form a structural member in the structural assembly.

An elevation-type stair structure comprises: a first stair module, including plural first treads and a first wall surface having a first door and a second door; a second stair module, including plural second treads and a second wall surface having a third door and a fourth door; and an elevator module, enabling the first stair module or the second stair module to be ascended or descended, when the second stair module is ascended for being above a location defined at one side of the first stair module, the second door is aligned with the third door, when the second stair module is descended for being below a location defined at one side of the first stair module, the first door is aligned with the fourth door. Accordingly, a user can walk through the first stair module and the second stair module then return to an original location.

An elevation-type stair structure comprises: a first stair module, including plural first treads and a first wall surface having a first door and a second door; a second stair module, including plural second treads and a second wall surface having a third door and a fourth door; and an elevator module, enabling the first stair module or the second stair module to be ascended or descended, when the second stair module is ascended for being above a location defined at one side of the first stair module, the second door is aligned with the third door, when the second stair module is descended for being below a location defined at one side of the first stair module, the first door is aligned with the fourth door. Accordingly, a user can walk through the first stair module and the second stair module then return to an original location.

A method for manufacturing at least one transportation tube having a plurality of transportation tube sections for a high-speed transportation system. The method includes manufacturing the tube sections in-situ adjacent to an approximate path of the transportation system where the tube sections are to be positioned.

A method for manufacturing at least one transportation tube having a plurality of transportation tube sections for a high-speed transportation system. The method includes manufacturing the tube sections in-situ adjacent to an approximate path of the transportation system where the tube sections are to be positioned.

A high-speed transportation system, the system including at least one transportation tube having at least one track, at least one capsule configured for travel through the at least one tube between stations, a propulsion system for the at least one capsule; and a levitation system for levitating the capsule in the tube.

A high-speed transportation system, the system including at least one transportation tube having at least one track, at least one capsule configured for travel through the at least one tube between stations, a propulsion system for the at least one capsule; and a levitation system for levitating the capsule in the tube.

A high-speed transportation system includes at least one transportation structure having at least one track, at least one capsule configured for travel through the at least one structure between a plurality of stations, a propulsion system adapted to propel the at least one capsule through the structure, and a levitation system adapted to levitate the capsule within the structure. At least one track is positioned to provide balancing force vectors to achieve stability for the capsule.