A method of assembling a vibratory apparatus, comprising: fabricating at a fabrication site a first sidewall, a second sidewall and at least one pair of mated interior walls (174; 175), the first sidewall, the second sidewall and the at least one pair of mated interior walls depending longitudinally between an inlet end and an outlet end, the at least one pair of mated interior walls disposed laterally between the first and second sidewalls when the apparatus is assembled, and at least one deck (104; 106) depending between the first and second sidewalls when the apparatus is assembled, and divided into longitudinally depending sections (176; 177) by the at least one pair of mated interior walls; fabricating at a fabrication site an exciter to be coupled to the at least one deck; characterised by: transporting the apparatus in at least three sections (120; 122; 124) to an installation site, the first section comprising the first sidewall, one of the at least one pair of mated interior walls, and the longitudinally depending section of the at least one deck between the first sidewall and the one of the at least one pair of mated interior walls, the second section comprising the second sidewall, one of the at least one pair of mated interior walls, and the longitudinally depending section of the at least one deck between the second sidewall and the one of the at least one pair of mated interior walls, and the third section comprising the exciter; attaching the pair of mated interior walls together at the installation site; and attaching the exciter to the first and second sections at the installation site. fabricating at a fabrication site a first sidewall, a second sidewall and at least one pair of mated interior walls (174; 175), the first sidewall, the second sidewall and the at least one pair of mated interior walls depending longitudinally between an inlet end and an outlet end, the at least one pair of mated interior walls disposed laterally between the first and second sidewalls when the apparatus is assembled, and at least one deck (104; 106) depending between the first and second sidewalls when the apparatus is assembled, and divided into longitudinally depending sections (176; 177) by the at least one pair of mated interior walls; fabricating at a fabrication site an exciter to be coupled to the at least one deck; characterised by: transporting the apparatus in at least three sections (120; 122; 124) to an installation site, the first section comprising the first sidewall, one of the at least one pair of mated interior walls, and the longitudinally depending section of the at least one deck between the first sidewall and the one of the at least one pair of mated interior walls, the second section comprising the second sidewall, one of the at least one pair of mated interior walls, and the longitudinally depending section of the at least one deck between the second sidewall and the one of the at least one pair of mated interior walls, and the third section comprising the exciter; attaching the pair of mated interior walls together at the installation site; and attaching the exciter to the first and second sections at the installation site. transporting the apparatus in at least three sections (120; 122; 124) to an installation site, the first section comprising the first sidewall, one of the at least one pair of mated interior walls, and the longitudinally depending section of the at least one deck between the first sidewall and the one of the at least one pair of mated interior walls, the second section comprising the second sidewall, one of the at least one pair of mated interior walls, and the longitudinally depending section of the at least one deck between the second sidewall and the one of the at least one pair of mated interior walls, and the third section comprising the exciter; attaching the pair of mated interior walls together at the installation site; and attaching the exciter to the first and second sections at the installation site.