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  1. #21
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    Quote Originally Posted by FIREMECH1 View Post
    How many feet, or how many seconds do I let it roll before it stops????

    Simple question.

    FM1
    Your right, it is a simple question. Of course a minimum or maximum distance is not listed in the book.

    The only thing I can suggest at this point is either dig deep into NFPA and see if there is a minimum or maximum distance listed or go with what you as the engineer would feel safe with.

    Popping the brake and the truck mmediately coming to a stop would be the best response I would expect. The longer the roll out, the less comfortable I would feel. With that said, if there is any roll out, that may also be normal due to the weight of the truck and the number of axles.

    I guess NFPA also wants us to incorporate redundant systems into our truck operations by listing wheel chocks as part of the mandatory equipment on all trucks.

    Going back twenty years to highschool physics... "An object at rest has a tendancy to stay at rest unless acted upon by another force... An object in motion has a tendancy to stay in motion unless acted upon by another force..."

    The next thing is anything that WE can do to keep the truck from moving will help. From parking brake to wheel chocks, on to turning a front tire in against a curb will help keep pthe truck from rolling away.
    Jeffrey

    "Plan for the worst, hope for the best!"


  2. #22
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    Default Answer to our questions...

    FIREMECH1, I went and asked some friends on another forum and here is the response I got:

    NFPA 1911, 2007 edition.
    16.4.1 The parking brake system shall be tested at least annually.
    16.4.2 The parking brake system shall hold the fully loaded fire apparatus on a grade of 20 percent or the steepest grade in the fire department's jurisdiction if a grade of 20 percent is not available.
    16.4.3 The parking brake shall be tested with the apparatus facing uphill and again facing downhill on the same grade.
    In my area, I have a grocery store parking lot with a side entrance that is very steep. I do not know if it is 20 percent grade, but it is the steepest grade around here. I use it to test the trucks in the nearby districts.

    Ronnie Fulcher


    The link below lets you convert an angle reading to percent grade so you can document the grade in the terminology the spec is written in. As you can see in the chart 20 % grade is app. 11 1/2 degree slope.
    http://www.engineeringtoolbox.com/sl...de-d_1562.html

    Patrick Collins
    ASE Master Auto, Med/Hvy Truck, Truck Equipment
    EVT Master Apparatus
    EVT Master Ambulance
    City Of Yuma, AZ

    Just had to go to the right people and ask politely for their help.
    Jeffrey

    "Plan for the worst, hope for the best!"

  3. #23
    Forum Member FIREMECH1's Avatar
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    hehe.... I'm also on that same site. If you're clever, you'll find me.

    Remember, I already know what it says for "ANNUAL INSPECTION".

    What I am talking about, is a "DAILY" brake test. One that will show a broken spring in the spring chamber, that unless you wait until you roll down and hit something, you won't find until it is too late.

    The NFPA has some good guidelines, and some that are just plain ridiculous. If you want to live and die by only what the NFPA says, then you are in trouble.

    We are progressive on the mechanical side, as the FD is on their side for their operations and equipment.

    If you don't want to do a daily brake test, fine. But if you hit something, your precious book isn't going to save you from liability. If, by chance a rig did roll down and hit something, it is duly noted that it passed a prescribed park brake test at 0700, when the accident happened at 1500. Things break, but the driver covered his butt by doing his daily checks. No lawyer will win this round.

    And all those credentials, I have them too.

    FM1
    I'm the one Fire and Rescue calls, when they need to be Rescued.

    Quote Originally Posted by EastKyFF
    "Firemens gets antsies. Theys wants to goes to fires. Sometimeses they haves to waits."

  4. #24
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    I guess our department goes kind of overboard when it comes to brake tests. I applaud this over achieving mentality though since the brakes will be the only thing that will save your bacon on the road. We do a daily brake test to satisfy the California Vehicle Code for commercial driving. This consists of a COLA test at minimum
    C- Cut in (note the pressure)
    O- Cut out (note the pressure)
    L- Leak test
    A-Alarm test

    I am not sure how many of our Engineers do a park brake test but i do every morning which consists of pulling the rig out to the front apron, allow it to roll and then pull it. No more than 5 mph when this is done.

  5. #25
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    Nullygarho: Easy way to check grade. You will need a 2 x 4 stud 8 ft. long. They are usually 97" (allows 1" trim to square), a level and a tape measure. Definition of percent grade is the drop in feet for a 100 ft. run. Changing to inches does the same thing. Put the level on the top of the 2 x 4. Place one end of the stud on the road, and raise the down hill end of the stud until it is level. Last, measure the distance from the bottom of the stud to the road and the inches you measure will be the approximate grade.

  6. #26
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    Quote Originally Posted by FIREMECH1 View Post
    If you want to live and die by only what the NFPA says, then you are in trouble.
    Truer words are rarely spoken.
    The American people will never knowingly adopt Socialism. But under the name of 'liberalism' they will adopt every fragment of the Socialist program, until one day America will be a Socialist nation, without knowing how it happened. --Norman Mattoon Thomas, 6 time presidential candidate for the Socialist Party of America

  7. #27
    Forum Member FIREMECH1's Avatar
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    Quote Originally Posted by txgp17 View Post
    Truer words are rarely spoken.
    LOL.... I have my days.

    FM1
    I'm the one Fire and Rescue calls, when they need to be Rescued.

    Quote Originally Posted by EastKyFF
    "Firemens gets antsies. Theys wants to goes to fires. Sometimeses they haves to waits."

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