An experimental study of wave only of interest to researche shore platforms. The American up must be taken into account on offshore platforms in orde wave striking the platform's add a small percentage of the depth. The research conducted mates of runup on piles and p diameter (D) much less than a between runup and velocity he as small as 0.015 (the scatte is a pile radius). No signifi of the three piles in a pile single piles and pile groups runup on vertical and inclined cylinders is not rs but also to practicing design engineers of off- Petroleum Institute RP2A(1) states that wave runwhen determining the appropriate deck clearances r to avoid the large forces which could result from lower deck. The present practice appears to be to water depth to the design crest height and water in this study was aimed at obtaining better estiile groups. A thin pile is defined as having its wave length (L). It was found that a relationship ad can be used for piles with scattering parameters ring parameter is defined as ka = (2Π/L)a, where a cant increase in runup is caused by the interaction group. A design procedure for estimating runup on is given in the paper.