A method of manufacturing aluminum alloy sheet comprising: heating, in a heat-treatment furnace and at an elevated first temperature, a coil of the aluminum alloy sheet to form a heat-treated coil; while at least a portion of the heat-treated coil remains in the heat-treatment furnace: uncoiling a heat-treated portion of the aluminum alloy sheet from the heat-treated coil; passing the uncoiled heat-treated portion of the aluminum alloy sheet through an outlet of the heat-treatment furnace; and continuously quenching, by a quenching unit, the uncoiled heat-treated portion to form a quenched sheet, characterized by guiding the heat-treated portion is from a perimeter of an uncoiled portion of the heat-treated coil in an uncoiling direction tangential to a coil perimeter through the outlet of the batch annealing furnace, wherein the uncoiling direction is a vertical direction and the outlet is on a bottom side of the heat-treatment furnace, feeding, using a guide system of the heat-treatment furnace, the heat-treated portion of the heat-treated coil into the quenching unit, wherein the coil is moved during uncoiling of the coil such that a vertical portion of the sheet article running tangential to the perimeter of the coil is maintained in the tangential direction at an outlet port of the heat-treatment furnace, and wherein the quenching unit is located outside of the heat-treatment furnace and below the outlet port and further comprising: mechanically joining an end of the coiled strip to an end of a second coil when the strip is almost completely uncoiled into the outlet port towards the quenching unit, wherein the mechanical joining is done by a clamping system, and maintaining an orientation of one or both of the outlet port and quenching unit substantially constant relative to an uncoiling position of the heat-treated portion when uncoiled from the heat-treated coil, wherein the elevated first temperature is at least 5°C lower than a solidus temperature of the aluminum alloy sheet. heating, in a heat-treatment furnace and at an elevated first temperature, a coil of the aluminum alloy sheet to form a heat-treated coil; while at least a portion of the heat-treated coil remains in the heat-treatment furnace: uncoiling a heat-treated portion of the aluminum alloy sheet from the heat-treated coil; passing the uncoiled heat-treated portion of the aluminum alloy sheet through an outlet of the heat-treatment furnace; and continuously quenching, by a quenching unit, the uncoiled heat-treated portion to form a quenched sheet, characterized by uncoiling a heat-treated portion of the aluminum alloy sheet from the heat-treated coil; passing the uncoiled heat-treated portion of the aluminum alloy sheet through an outlet of the heat-treatment furnace; and continuously quenching, by a quenching unit, the uncoiled heat-treated portion to form a quenched sheet, characterized by guiding the heat-treated portion is from a perimeter of an uncoiled portion of the heat-treated coil in an uncoiling direction tangential to a coil perimeter through the outlet of the batch annealing furnace, wherein the uncoiling direction is a vertical direction and the outlet is on a bottom side of the heat-treatment furnace, feeding, using a guide system of the heat-treatment furnace, the heat-treated portion of the heat-treated coil into the quenching unit, wherein the coil is moved during uncoiling of the coil such that a vertical portion of the sheet article running tangential to the perimeter of the coil is maintained in the tangential direction at an outlet port of the heat-treatment furnace, and wherein the quenching unit is located outside of the heat-treatment furnace and below the outlet port and further comprising: mechanically joining an end of the coiled strip to an end of a second coil when the strip is almost completely uncoiled into the outlet port towards the quenching unit, wherein the mechanical joining is done by a clamping system, and maintaining an orientation of one or both of the outlet port and quenching unit substantially constant relative to an uncoiling position of the heat-treated portion when uncoiled from the heat-treated coil, wherein the elevated first temperature is at least 5°C lower than a solidus temperature of the aluminum alloy sheet.