outer side of the i beams on the other hand the plates 60 at the end of the staging section 52 are placed on the channels on the inner side of the i beams 54 in this manner when the two staging sections are brought together the inside plates 60 on the staging section 52 will fit inbetween the plates 60 on the staging section 50 the bores 68 of all four plates will then be aligned it should be noted that for convenience the rear sections 62 of the plate 60 includes a cut out 70 to accommodate the pole 72 which is formed in the staging section for support of the surface 56 in order to retain the staging sections interconnected and secure them properly onto the support arm 14 a coupling arrangement is provided the coupling arrangement includes a first l shaped section 74 formed of tubular material and including a horizontal section 76 and a downwardly depending vertical section 78 an opposing l shaped section 80 includes a horizontal leg 82 and a downwardly depending vertical leg 84 the leg 82 has a smaller diameter as compared to the tubular legs 76 so as to be telescopically received therein at the distal ends of both arms.