Looking for any advice on building a mezzanine level in a warehouse space, to then use the second floor as a completely open and light working area, with all of the storage and heavy items down on the ground level.We are about to start moving into a small ( sqft) warehouse/workshop and needing to figure out the best way to build a full second floor mezzanine for the place that will also be level up to the top of an existing 9ft tall office room and a bathroom.The two options that I am looking into are either using pallet rack shelving as the base underneath to support everything, or to possibly bring in a couple of 20ft shipping containers and try to build the second floor on top of them, or maybe even a combination of both for the front half and the back half of the area.If using the pallet rack shelving, by building multiple separate free-standing shelves placed front to back, what would be the best way or best material to use to connect them all together with some kind of cross member support laid on top, to also act as floor joists for the second level, and that would be able to go across all of the beams perpendicularly?From looking online it seems that there is some type of metal I-beam supports that are commonly being used on top of the beams and before laying a plywood floor, but I am not sure exactly what kind or where to find them.The ground level will need to have as much shelving everywhere as possible, so either possibly built into the lower parts of the pallet racking or as smaller free standing shelves.Here are some quick photos trying to show some of the options if I were to be using the pallet rack shelving or the shipping containers.
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Fire safety
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The details of your mezzanine flooring will dictate what you need here. Size and purpose are the primary considerations; for example, mezzanine floors for storage measuring less than 10m in any direction dont require fire detection. However, the same flooring measuring between 10m and 20m in any direction will require fire detection or resistance as a minimum. Beyond these measurements (20m+), storage mezzanine flooring needs fire detection and an alarm system. Retail and office space mezzanine floors require detection and alarms, whatever their size. As individuals access them, whether customers, operatives, visitors or anyone else, all mezzanines must be fire rated as standard, no matter how small or large.
As for new installations, like the emergency lighting, you may not require new systems for the mezzanine specifically, as long as your installed sprinkler system will cover the structure and provide adequate water coverage in a fire. If not, then you will need an additional or extended sprinkler system.
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