Dear all,

We are working on a large commercial distribution center project where the use of natural ventilation in the warehouse areas is essential. The project has a large building (480 m x 130 m) that will be divided into 4 modules (140 m x 130 m) for future rental. The modules are designed in the Cross-Dock format, that is, there are docks on both sides of each module. As the modules will be distributed, the modules at the ends of the warehouse will have lateral walls in contact with the external environment, where the external air intake will be performed for the renovation of air in the environment. On the other hand, the two modules in the middle of the warehouse have their side walls bordering other modules and therefore only the facades of the docks are in contact with the external environment where the external air intake will be realized. The outdoor air intakes of the modules in the middle of the warehouse are being provided at the top of the dock door, with natural ventilation through vents.

The project is being developed for the use of 18-meter-long trucks. On the dock area there is a mezzanine at a height of 6.25 meters, with a projection of 9.40 meters and a canopy with projection of 3.00 meters. The distance from the probable point of exhaustion of the truck is more than 15 meters from the outdoor air intake, which surpasses the covered area (mezzanine + canopy - which is 12.4 meters) and the minimum required by ASHRAE 62.1 2007 which is 7.5 meters.

We would like to question if the requirement of ASHRAE 62.1 2007 - 5.6 Outdoor air intakes, 5.61 Location, Table 5-1 - is being met for the minimum distance of 7.5 meters from truck loading area or dock.