Question: Our layout will be L-girder construction with the use of cleats and risers. My sister just had her bathroom remodeled and has a good amt of scrap material left over. It is of 2 types:
1) MDF boards: 11/16 thick x 3 1/2" wide x 12" or greater long. Finished white on 2 sides.
2) v grooved shiplathe siding - if i rip it to cut out the v grooves and tongue & groove areas are: Pine 11/16" thick x 2 3/4" wide x >1' (greater than 1 ft)
Are there any structural issues and/or long term issues with using these materials for cleats and risers. I realize i'll have to rip them to appropriate widths / lengths.