POP13 Design product &Casing Standard Block &Duct Stiffener Field Joint Corner Angle Connection Miscellaneous Assembly Equal size Channel Splice Stiffener Field Joint Flange + Protector Stiffener Stopper Section Block Increase Mark No. Mark No. of Bom Work this DWG. with B&uckstay Standard Block Co&al Silo Standard Block &Steel Structure Standard Block &Other Standard Block