Pool School PRO Hose w nozzle. When you build a pool and deck, youve got two separate concrete structures that can be joined together in any of four ways. One of the original ways is to build the pool wall up to about the same elevation as the top of the inside edge of the deck and leave a small gap between deck and the top of the pool wall. You then cover this gap and the top of the pool wall with a decorative, cement coping stone. By cementing the coping stone to only the top of the pool wall, youre letting it float over the gap and deck edge. Built correctly, this is simple and effective blend of structures and will last decades without problems. If the outside edge of the copng should somehow become attached to the deck surface, either by using a non flexible gap filler, tile or a textured surface material like Kool Deck or acrylic knock down that touches both deck and coping stone surfaces, the coping stone can no longer float and problems arise. Now, any deck settlement or pool expansion pressure gets transfered to the coping stones and, being decorative and not structural, respond by cracking and splintering. And, sometimes they just seem to fall apart for no particular reason whatsoever. Replacing coping stones is a simple enough process and is covered on the Pool School PRO CD when the stones are still being manufactured and readily available. But what happens when you have a cracked coping stone and they arent making that particular size or style anymore This is a much easier job when the pool is drained, but do able, with patience, in a filled pool. Understand that you cannot drive masonry nails into coping stone or grout joints to attach formwork so use the adjoining stones to reference form and elevation. The basic repair material is color matched sanded tile grout. Buy it in the 2. 5 lb. Lowes acrylic fortified grout. Home Depot tile grout is noticeably grainy and needs a white cement unsanded tile grout boost to adhere properly. Remove any loose material and hose the area well. To prevent rust bleed thru, any exposed steel reinforcement rods should be spray painted or removed. Sponge cement bonding agent over the area. Remember that the bonding agent dries clear, so be generous in your application without causing puddling. Mix the grout to a peanut butter consistency. Using the profile of the adjoining stones, roughly trowel the grout into shape and depending on the length of the coping nose what extends out into the pool and you may have to form it by hand. Give the material twenty minutes to begin to set. If youre having problems forming the nose material falls into the pool, add a little dry cement to your mix and stir well and often. Keep the mixing bucket out of the sun and build out the nose as the material stiffens. A pocked surface can be duplicated by troweling salt pool or ice cream salt flat into the surface and allowing the surface to set. Come back the next day, rinse the salt crystals away and VoilaA salt texture. This particular finish featured small flakes duplicated by using an over sized salt shaker to distribute black and white flakes sold in paint stores to decorate garage floors. The surface was troweled smooth, swiped lightly with a damp sponge for a little non skid texture and the flakes applied while the surface would still absorb them. Clean up comes an hour later with a weak acid 1acid to 5 water sponge wipe, a solution thats also effective in removing cement from your hands so long as you have a hose handy. Buy Pool School Archives Help Praise Links Great American Pools, Inc. Excerpts from Pool School, pictures, text, graphics and web page design 1. Scott Cruikshank, all rights reserved. Reproduction in whole or in part in any form or medium without express written permission of the author is prohibited. Date 10252017 41528 pm ref 00098061 mopar engine 383 big block mopar engine 383 big block crane cam roller rockers triple springs moraso electric. 661PRO analyses header box nozzles for aircooled heat exchangers. It performs tube load analysis from multiple nozzle loads per ASME Section VIII1 Appendix A.