Henry Revoil Grate based on the 514th page of the book Барановский Г.В. - Архитектурная энциклопедiя второй половины XIX вѣка. Т.7, Детали, 1904г. (G. Baranovsky - Architectural Encyclopedia of the Second Half of the 19th Century. Vol. 7, Details, 1904.)
The number of polygons is shown for an unsmoothed model. The stack is not collapsed. With the included modifier Meshsmooth = 2, the number of polygons will be equal to 824198, vertices - 824936.