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## Safety Precautions - operators of pumpers that are in proximity to the building should spend as little time as possible exposed to falling glass - wear full protective clothing - once the lines are charged to the correct pressure and operating, they should return to the apparatus cab to monit...

## Safety Precautions - operators of pumpers that are in proximity to the building should spend as little time as possible exposed to falling glass - wear full protective clothing - once the lines are charged to the correct pressure and operating, they should return to the apparatus cab to monitor the engine's oil pressure, temperature, and so forth - only make brief trips to the pump panel to check pressures or make adjustments as needed - lines supplying siamese connections may have to be covered with plywood to protect them from falling glass - some newer cities have mandated that fire department siamese connections be installed at the perimeter of the property, or under overhead protection to shield firefighters and supply lines from the dangers of falling glass - the effect of wind and the stack effect are additional considerations when considering horizontal ventilation - as mentioned earlier, wind at the upper levels of high-rises can be very strong - Venting windows on the windward side can have a disastrous effect - The only way to evaluate this is to duplicate the situation in terms of door and window positioning on the floor above or below the fire prior to breaking any glass on the fire floor. - The stack effect is also affected by horizontal ventilation