Hi-
Try below approach:
TYPES: BEGIN OF t_collect,
vbeln TYPE vbrp-vbeln,
posnr TYPE vbrp-posnr,
fkimg TYPE vbrp-fkimg,
zprs_role TYPE vbrp-zprs_role,
END OF t_collect.
DATA: it_collect TYPE STANDARD TABLE OF t_collect,
wa_collect TYPE t_collect.
LOOP AT it_tab INTO wa_tab.
MOVE-CORRESPONDING wa_itab TO wa_collect.
COLLECT wa_collect INTO it_collect.
ENDLOOP.
-Venkat