Shopping List: 1"-by-4' pine boards, 2"-diameter PVC pipe, Wood screws (four per holder), Deck screws (exterior self-tappers for mounting rack, 3" number 10s), Pipe straps
1) Determine how many holders you need. Leave 9" between the center of each holder to allow for reel handles, then add 1'. The total is the length of your rack.
2) Now cut two 1"-by-4' boards that length. Then cut 1' cross the cleats. You'll need one cross cleat for each end, plus another for every four or so feet of rack length. Place the end cleats on floor and put the long stringer pieces on top. Square it up and screw together to make a rectangle.
3) Next determine where on your wall the rack is going to go. Find the studs and mark them on the assembly. Cleats should hit the studs. Now, mark the position of each rodholder on both stringers, and screw intermediate the cleats on.
4) Cut PVC to length and lay in position on the rack. Secure using pipe straps.
5) Find studs and screw through cross cleats and studs using deck screws. Start by putting one screw partway in at one end, then using a level, pivot the assemble until level and put a screw at other end Then simply place two screws, one high and one low, through each end cleat and each intermediate cleat.