words the distance between each of the slots 54 is predetermined depending upon the distance between one lug 34 to another lug 34 on the adjacent plate 32 thus when they are united the space between the ends 60 is of a dimension which is slightly greater than the thickness of the planar plate 32 the purpose for this spacing will become apparent with the addition of extending the tabs 62 of the tie members 30 through the pre positioned slots 56 and 58 and the twisting thereof to lock them it will be seen that the tie members will be in fixed relationship one to the other when it is desired to extend the plane of the wall outwardly to form the pilaster or the column a pair of the tie members 30 may be united by the spacer extender 14 so that the thickness of the pilaster will be comparable to the thickness of the wall as seen in fig1 or fig2 if however it is desired that the pilaster or column be extended an additional distance outwardly therefrom then an additional tie member 30 may be united with the spacer extender 14 for whatever length is necessary when the final depth of the column or pilaster is established the end 60 of one of the tie members 30 will then engage the flanges 24 through the slots 28 to be locked in position by twisting the lugs 26 such as seen in fig1 in order to complete the rigid construction for the.