in a previous article we began to look at the topic of flat roof ventilation and explored some different points on the subject. the coffin cut is one way to ventilate a flat roof. this cut is also referred to as the 7-9-8 cut as well because of how the ventilation opening is cut based on the sequence of cuts. this allows the section of roof that is being cut to be free of any obstruction or attachment to the roof. this is where a diagonal cut is made in the corner of the “8.” this diagonal cut can be made either at the end of the series or at the beginning with the number “7” or at both points.
the square cut is another way to ventilate a flat roof. the advantage of the square cut over the coffin cut is that the firefighter making the cut is traveling in one direction all the way around. the firefighter making the cut must be aware of foot and body placement in relation to the rotary or ventilation saw. the cutting firefighter must focus on making the cut and thus requires another set of eyes to guide and watch over the conditions, the surrounding area, and any other hazards present. notice that the hand of the guide firefighter is placed on the back/shoulder of the cutting firefighter. he is an international instructor teaching in canada, the united states, and india, and at fdic.
mark van der feyst examines some considerations firefighters need to keep in mind when dealing with flat roofs. mark van der feyst examines two ways firefighters can ventilate a flat roof: the coffin cut and the square cut. at a flat roof building, firefighters most often go to the roof to conduct initial ventilation. because of the challenges of this critical, for which type of occupancy is the 7, 9, 8 ventilation cut best suited, trench cut, trench cut, roof ventilation, roof vent.
vertical ventilation techniques : panelized roof. 5,884 the roof firefighter should then perform any quick ventilation tactics, including, opening a bulkhead door and check for occupants, vent a roof. • roof operations are usually performed in an area that is remote from other firefighting personnel. • safety must be maintained by roof crews., attic vents.
When you try to get related information on flat roof ventilation fire fighting, you may look for related areas. for which type of occupancy is the 7, 9, 8 ventilation cut best suited, trench cut, roof ventilation, roof vent, attic vents.