the decorative slats 110 i the support rails 120 i can pass through the holes 112 i such that the installer can secure the support rails 120 i within the holes 112 i as described in further detail bellow moreover as further described below the support rails 120 i can allow the installer to secure the decorative slats 110 i thereto at predetermined locations which can reduce or eliminate installation errors for example as illustrated in fig7 b 7d the installer can insert the support rail 120 i into the hole 112 i and can subsequently secure the support rail 120 i to the decorative slat 110 i in particular as illustrated in fig7 b the installer can insert a portion of the support rail 120 i into the hole 112 i of the decorative slat 110 i in at least one implementation the support rail 120 i can have first and second halves 122 i 124 i specifically the first and second halves 122 i 124 i can fit together such that the support rails 120 i can fit into the holes 112 i moreover the first and second halves 122 i 124 i can have a sliding coupling such that the installer can move the first and second halves 122 i 124.