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Here is an explanation of the distribution of fire sprinklers on AutoCAD according to the international code NFPA. The distances between the fire sprinklers and the distance between the sprinkler and the wall are taken into account. And the area covered by a single fire sprinkler. The distribution is done on the AutoCAD program using an Excel sheet containing fire constants and fire blocks. Fire tables Excel sheet according to the code: https://bit.ly/2EPvC9u A set of fire blocks for AutoCAD: https://bit.ly/2QxnP31