By Tom Kiurski
基本的消防员技能是从训练训练开始的好地方。它们可能是整体培训演变的一小部分，或者整个培训演变可能是基本技能的培训。尽管在教室里度过的时间很有价值，并且可能是展示某些课程的最佳方法，但大多数消防员都喜欢动用软管和喷水。如果我们能够接受对动手培训的热爱，并将其作为教育课，对您（和您的成员）有益。
188金宝慱官网历史训练分钟重新审视：2 1/2英寸线的“ PIN＆HIT”策略
Systematic Views of the 2 1/2-Inch Handline in Fire Attack
我们中的许多人已经走了足够长的时间，可以处理1½-，1¾-和2英寸攻击线。我想我可以说最常见的攻击line out there today is the 1 ¾-inch hose. It has the advantage of being fairly lightweight, can be maneuvered by one firefighter most of the time, and it can easily move around most of today’s homes. Since most of the fires we respond to are smaller fires, the 1 ¾-inch hose is a great choice for dwellings and smaller-sized fires.
However, we cannot forget the 2 ½-inch attack line. It has been in existence for a long time, and has gone from the main攻击线在当今的火器设备上的存在要小得多。它的重量超过1¾英寸的线；1¾英寸软管的50英尺截面只能容纳超过50磅的水，而2½英寸软管的50英尺部分的重量仅超过100磅。
But the advantages of the 2 ½-inch hose are many. You may be hard pressed to get more than 200 gallons per minute (gpm) out of the 1 ¾-inch hose, but flows of over 300 gallons per minute are attainable from a 2 ½-inch hose…that is more than a ton of water per minute! The larger hoseline has better reach and penetration, and can be broken down and turned into smaller handlines with just a few simple steps. Consider the 2 ½-inch handlines for anything larger than one- and two-family dwellings, commercial, industrial, strip malls and defensive operations. We have all seen the guy spraying a 1 ¾-inch hose at a major defensive operation and wondered why a larger line wasn’t chosen.
这training day我正在叙述您刚刚阅读的一些背景信息开始。我们走过卡车上有2½英寸软管的地方，我们拥有多少，附着的喷嘴以及其他喷嘴的位置。然后，我们前往50英尺长的软管，并在其末端带有实心溪流。我们谈论了压力和gpm流动。然后，我们对其进行了加压，并让每个人都感到有适当的压力。我们关闭了线，摘下了堆栈尖端，揭示了1½英寸的线。我附近有一个1¾英寸软管的部分，我有一个消防员的线程，以便我们可以看到一切都在一起。
我们将更多的2½英寸延伸到我们的训练塔，然后将其流出塔的侧面。这条线上有我们的组合喷嘴，我每个人都对此有所感觉，因为压力比实心溪流喷嘴多一点。然后，我们将线沿着塔楼沿着塔上的循环排列，进行防御行动。如果正确完成，一个人可以轻松地坐在并控制这条大线路。然后，我们轮流从这种设置中流出水，并审查了可能对2½英寸软管操作（例如封闭式Wye）有用的工具和设备。暹罗, hose clamps, hose straps, and hose rollers for advancing hose up the side of a building to an upper floor.
（（1) The 2 ½-inch solid stream nozzle is shown here. The stack tips can be removed to reveal 1 ½-inch threads, which can accept lengths of the smaller diameter hose. Also, other tools and appliances are demonstrated.
（（2) The 2 ½-inch hose, attached to a combination nozzle, is advanced up the tower, and looped for a defensive operation.
（（3) The 2 ½-inch hose and nozzle are advanced up the tower and water is directed out of the tower. This is a good drill for estimating hoseline lengths and increasing pressure for elevations.
（（4) Feeling the nozzle reaction of this large line and advancing it is a great teamwork concept.
（（5) The 2 ½-inch hose can be looped in a defensive position and can be controlled by one firefighter.
