Fornell: Hydrant Hook-ups, Chicago Style

The ABS system helps the driver retain control of the vehicle under heavy braking conditions. Air Brake A brake which is operated by air. The air brake system on tractors consists of air lines, valves, tanks, and an air compressor. Air Ride Suspension The suspension system supports the weight of the load, plus the trailer on air filled rubber bags rather than the old system which used steel springs. The compressed air is supplied by the air compressor and reservoir tanks which provide air for the air brake system. Air Spring System The system in which the container and plunger are separated by pressurized air. When the container and plunger attempt to squeeze together, the air compresses and produces a spring affect. Air Tank A reservoir for storing air for use in the air brake system. Braking would be impossible without an adequate supply of air.

The Hydrant!

Dave Fornell On Jan 14, Chicago Engine 26 connected to a hydrant with its 6-inch hard suction, which reduces friction loss and provides an unobstructed waterway for maximum flow. This insured that maximum flow was available. Note the front preconnected soft suction was too short to connect. Its unlimited water source is Lake Michigan and water surges through its mains at around 35 to 40 psi. While that does not sound like much to those more familiar with higher pressure systems, keep in mind that even with high volumes flowing, the pressure rarely drops more than 15 psi.

Jan 13,  · Concept behind this provision is that if at any support say half ldh is available for stressed bars then these bars will develop half of their strength through bonding in concrete and will be able to take stresses till xFy,if you add up same no of bars with same ldh then they will also bear stresses upto xFy and as a whole you will get.

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18” LDH Hydraulic Detach. 2 in mind with the proper spacing allowing for easy hook-up • Air & Electric lines are secured above the lower flange of the inside main beam keeping them protected from the road and weather to ensure the best protection available in the industry.

We are already at the mind-set that this big hose is magical. I hope I will be able to prove to you that there is a little more to this stuff than just laying it out. It must be used properly in conjunction with all other equipment, manpower and the local water system to make it perform to its max. Well, guess what folks, as simple as it may seem, there are several things that go into the actual supply line evolution in regards to its deployment that makes for a very smooth and efficient operation.

There are several techniques that are taught and used throughout the fire service on how to best anchor the supply line to the fire hydrant to allow the engine company to pull away laying the line. For the most part these techniques are geared towards safety. If for some reason the supply line were to get hung up and pull away from the hydrant wrap, it is very important that the fire fighter taking the hydrant stands out of the way.

Throughout my years in the fire service, I have always been taught this and told of the consequences if the line were to pull away and a fire fighter were to get struck. I always thought it was one of those accidents that was always talked about but never really happened, and then it did. He required surgery and 6 months of convalescence to get back on the job. A second accident caused by the same type of scenario pulled the wrap off the hydrant and struck a fire fighter in the head with the hydrant adapter on the end of the supply line, fortunately it only hit him in the helmet which protected him from injury.

Folks, these accidents can happen. There is a safer method.

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Aug 24,  · ACI allows for a reduction in the ‘ldh’ with a standard hook for the ratio “As req’d/As provided”. I have a situation where I have a standard hooked bar, but the length of the hook is only about 11 bar diameters instead of 12 bar diameters.

I would have top and bottom reinforcement in the footing to provide the last 2 of these. The bars in the back face of the wall then need to develop past the top footing bars and also lap to the bottom footing bars in the toe with sufficient bend diameter to allow force to develop fully past the bend to form the lap with the bottom bars. Your statement that “a standard hook will work” is incorrect if the joint is to take the full moment.

You need to study the details which KootK posted, which list the efficiencies of various types of joint reinforcement. Testing by Nilsson and others has shown that the double hairpins as shown in Figure are really the only way of fully developing opening corner joints. It’s rudimentary and requires some manual parameter iteration. Maybe twenty minutes per run to set up and fiddle with.

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If you must draft, you need to have the right equipment to make it happen, and you need to know how to use it. If you seek an alternative, you must be prepared to draft. How do you access them? What equipment do you need to access the alternative water supplies you have available? Will it be easy to use, and provide the highest flow capability possible based upon the apparatus pump size and the available water from the alternative source?

© , GBW Associates, LLC Westminster, Maryland 1st Arriving Engine The 1st arriving engine deploys a TFT Blitzfire line and has initiated a layout of 4-inch.

Have you trained on maximizing tank water? Have you timed your tank? How much tank water is available on your first alarm assignment? Do you think catching a hydrant guarantees success? The Hydrant Many times every day in America, a fire company secures a hydrant for a working fire. First, you must have enough fire fighters on-scene to utilize booster water, by stretching and advancing the proper size attack line for the fire situation you are faced with.

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If interior operations will be delayed, hook up and support sprinkler operations first. E. Hooking up (for stand-pipe operations) 1. If an interior attack is proceeding without delay, stand pipe operations using 4” or 5” LDH, you will need a wye and short sections of 2½” or 3” hose to connect to a.

As such, one would need to develop fy. Can anyone shed some light on the reason s why shear friction bars need to be fully developed? Sort of a shear friction version of ductility? Maybe in the process of shearing across one set of saw-toothed-ish projections, full fy gets engaged? It has always seemed to me that a number of commonly used details would not work if shear friction development length cannot be prorated. In my neck of the woods, foundation walls do not get poured higher than the underside of ground floor slabs.

I attempt to muster that shear friction by running small diameter dowels up from the exterior of the basement walls and bending them horizontally into the ground floor slab. Generally, there is not enough slab depth available to fully develop the bars. As a belt and suspenders thing, I place longitudinal 15M bars in the bend and hope that I can consider the bars fully developed at the bend like you can with beam stirrups.

The greatest trick that bond stress ever pulled was convincing the world it didn’t exist. The mechanism of a shear friction failure due to failure of the bar development would be catastrophic and sudden.

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Posts must be on-topic, non-disruptive and relevant to the firefighting community. Post only in a mature and responsible way that contributes to the discussion at hand. Post in the correct forum and have clear titles for your threads. Please post in English or provide a translation.

Picking up large diameter hose (LDH) is based on a vacuum principle, which allows water to be drained out of the hose while at the same time not allowing any air to be pulled back in. This process in turn draws the hose down completely flat and makes it very easy to reload.

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Second, shut down the hydrant and hook up a second fire department pumper to the hydrant, hooking up to all available hydrant ports. Once you have secured all available water from the hydrant, hook up the previously laid LDH to a discharge on the pumper, and send it all to the pumper ′ down the line.

There are many types of hoses on the fire engine, and each has its own specific role in putting out a blaze. Hoses, also called lines, will put out different amounts of water depending on the hose length, diameter and the amount of pressure in the pump. When responding to a house fire, the firefighters will immediately pull off the crosslay hoses. These lines are located directly below the pump panel.

They lay out in the open and are light, so they are easy to get off the fire engine for attacking a fire. Crosslays are feet 61 m long, have a diameter of 1. For smaller fires, such as small wood fires or chimney fires, the small booster line is adequate. A booster line is the smallest hose on the truck and has a diameter of about 1 inch. Located directly above the pump panel is the deluge gun, also called a deck gun or master stream.

Just by looking at it, you know why this water cannon carries those names. The deluge gun is used to put a lot of water on large fires. It can put out in excess of 1, gallons per minute. These lines are preconnected to the truck in order to save time at the fire scene.

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