DPWH Standard Specifications for Wet Stone Masonry (Cobble Stone), Item 516. Category: Department OrderSub Category: construction-materialsSeries: 2007No: 52File: DO_052_S2007.pdfDate: Thursday, September 20, 2007Tags: Standard 052 Specifications Wet Stone Masonry (Cobble Stone) Item 516 materials Read more about DPWH Standard Specifications for Wet Stone Masonry (Cobble Stone), Item 516.