spaced apart along the length of the apparatus however in order to fasten a cartridge to steam distributor apparatus 10 it is not necessary that a pair of bolts be associated with each compartment the recess region is designed to accommodate one or more drop out steam profiling cartridges in the case where a single integral cartridge is employed its length would essentially match that of the recess region alternatively a plurality of shorter cartridges which are individually inserted into the recess region and secured thereto can be employed the use of multiple smaller cartridges allows for selective removal for maintenance for example a sectioned cartridge that includes 9 steam profiling zones 82 a through 82 i is positioned in the recess region adjacent endplate 90 other sectional cartridges are then positioned in the recess region to form a series of sectional cartridges juxtaposed from end to end one benefit of employing sectional cartridges is that a fixed design unit can be more readily based lined with conventional 3 d modeling and parameterized computer aided design cad software furthermore once a design unit is dimensionally fixed it can be used in the design of various steam distribution apparatuses finally employing a drop out steam profiling cartridge simplifies the overall design of the accompanying steambox header by reducing the number of internal channels in particular with comparable prior art steambox headers that accommodate removable steam profiling screens a higher number of internal channels must be welded to the steambox headers in order to allow the removable screens to be positioned properly while maintaining the required contour of the steambox front side the length of steam distribution apparatus 10 typically corresponds to the width of the sheet or web to which steam is to be applied for papermaking the length generally.