A method of welding an end of an elongate structural I beam to a beam-attaching facial side in an initially separate beam-attaching end component comprising: preparing the subject beam end by assuring that the two flanges in the beam terminate at the associated end of the beam with generally overall planar expanses which lie in a substantially common plane which is disposed generally normal to the beam's long axis; preparing the end component's beam attaching facial side with a first elongate trough, characterised in that: the beam attaching end component is generally planar and the beam-attaching facial side is intended, with the I beam and end component joined to one another to be disposed in a manner whereby the end component spans the entire footprint of the beam, and wherein the method further comprises preparing the end component's beam attaching facial side with a second elongate trough, spaced apart from the first elongate trough, wherein the troughs (24, 26) are arranged so as to substantially to confront directly the planar expanses of the flanges under circumstances with the beam and end component brought into appropriate relative positions preparatory for joinder, and with those relative positions established, producing weld connections which substantially fill the troughs (24, 26) with weld material, thereby to establish weld joinder between the beam and component. preparing the subject beam end by assuring that the two flanges in the beam terminate at the associated end of the beam with generally overall planar expanses which lie in a substantially common plane which is disposed generally normal to the beam's long axis; preparing the end component's beam attaching facial side with a first elongate trough, characterised in that: the beam attaching end component is generally planar and the beam-attaching facial side is intended, with the I beam and end component joined to one another to be disposed in a manner whereby the end component spans the entire footprint of the beam, and wherein the method further comprises preparing the end component's beam attaching facial side with a second elongate trough, spaced apart from the first elongate trough, wherein the troughs (24, 26) are arranged so as to substantially to confront directly the planar expanses of the flanges under circumstances with the beam and end component brought into appropriate relative positions preparatory for joinder, and with those relative positions established, producing weld connections which substantially fill the troughs (24, 26) with weld material, thereby to establish weld joinder between the beam and component. the beam attaching end component is generally planar and the beam-attaching facial side is intended, with the I beam and end component joined to one another to be disposed in a manner whereby the end component spans the entire footprint of the beam, and wherein the method further comprises preparing the end component's beam attaching facial side with a second elongate trough, spaced apart from the first elongate trough, wherein the troughs (24, 26) are arranged so as to substantially to confront directly the planar expanses of the flanges under circumstances with the beam and end component brought into appropriate relative positions preparatory for joinder, and with those relative positions established, producing weld connections which substantially fill the troughs (24, 26) with weld material, thereby to establish weld joinder between the beam and component.