member 40 and the rods 52 and 54 inhibits relative movement between the wall member 32 and the grid member 40 fig5 illustrates a third example grid profile 84 in which the first rod 52 and the second rod 54 extend through the loop passageway 70 in the third example grid profile 84 the example grid member 40 and in particular end portions of the longitudinal members 42 of the grid member 40 are extended under the first rod 52 over the second rod 54 down along the rear face 60 of the wall member 32 and back substantially parallel to and under the buried portion of the grid member 40 the rods 52 and 54 engage the wall loop 34 such that when the grid member 40 is placed under tension friction between the grid member 40 and the rods 52 and 54 inhibits relative movement between the wall member 32 and the grid member 40 in this third example grid profile 84 placing the grid member 40 in tension will further pull the first and second rods 52 and 54 together effectively clamping the grid member 40 therebetween fig6 illustrates a fourth example grid profile 88 in which the first rod 52 and the second rod 54.