26 and into the beam 14 with such construction the weight of the plank 16 on the flange 26 which latter is of soft or resilient material results in a tight fit and seal taking up any unevenness especially as the nail is driven home also the softness of the snubber strip results in its taking up uneveness of the beam 14 whereby water is prevented from entering and collecting at these areas additionally the confinement of the upper portion of the beam 14 by the wall 22 and lip 32 of the snubber strip tends to prevent the beam from splitting when the nail 34 is driven in it should be noted that the upper flange 26 is confined along its entire length between the beam 14 and the planks 16 making up the deck of the dock and that no localized mashing of the upper flange 26 can occur due to driving in of the nails 34 another embodiment of the invention is illustrated in fig4 wherein the improved snubber strip is designated generally by the numeral 38 in this figure floor planks 40 are placed to overlie a pair of beams or stringers 42 44 which can be secured in side by.