| 摘要 |
The present invention provides a method for giving a concrete surface visual and tactile detectable warnings for pedestrian traffic and users of wheeled conveyances. This method starts with an existing concrete surface on which the detectable warnings are desired. First it is determined where and in what pattern on the surface the detectable warnings are to be placed. Next, the concrete surface is marked at each space where a warning is to be placed. This can be done by manually measuring and marking or by placing a pre-made sticker sheet, cut to the size of the necessary surface and marked in the predetermined pattern directly on the surface. Next, a hole of predetermined depth and diameter is drilled into the surface at each mark. This can be accomplished using any tool or method acceptable for drilling a hole into concrete according to the specifications necessary for the hole. If a two-ply sticker sheet is being used, the first layer is removed. Next, a button is placed in the hole. Said button is to have a top in the shape of a truncated dome. The bottom of this truncated dome portion must be larger than the diameter of the hole so that it will rest on top of the concrete surface. An elongated member extends from the bottom of the truncated dome part of the button to a length not to exceed the depth of the drilled hole and of a diameter not greater than that of the hole but great enough to cause a secure fit of the elongated member in the hole. Epoxy may be used to increase the security of this fit. Any remaining sticker sheet on the surface is then removed leaving a concrete surface having detectable warnings securely embedded.
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