The Code Reporter

The latest information on the California elevator safety code.





Tuesday, November 29, 2011

NCEIG Christmas Dinner Party and Old Timers Reunion

Hello Elevator People!

Yes, the Annual NCEIG Christmas Dinner Party and Old Timers Reunion is just around the corner so make your plans now! In the past we have always asked our members to do a bit of outreach to our retired industry colleagues with some success. This year let’s try to get as many retirees as possible! Remember, our industry retirees and their spouses can attend this party without charge, they are our honored guests after all.

We would also like to ask everyone that is planning to attend to RSVP by no later than Friday, December 2nd, 2011 by sending an E-mail to: ebleyle@bleyleelevator.com.

And our President, Erik Bleyle, has also requested that, if possible, our members (suppliers and otherwise) bring some items to donate for the Christmas party raffle.

So, get out your Roladex (old timers know what those are) and dial-up (wait, phones don't have "dials" anymore) all of the guys (were there any gals then?) who used to run you around when you were a 50%'r.  Know any old branch managers, construction/service managers, salesmen, drill rig operators, state inspectors, etc.  Get them all and their significant others to the Christmas party.  Truly the best event of the year for NCEIG is hearing the tall tales of these living legends - said by someone who's loosing his hair and is not so young anymore himself.  It's always great fun and the food & drinks are great too. 

See you at Sinbad's!

Cheers,
Your Code Reporter
Rich Blaska
 

Changes to California Shunt-Trip Rules

I've been informed by my good friend, Bill Mitchell, Schindler Elevator Corp., of a major change in the requirement for shunt-trip power disconnection in California.  The Office of the State Fire Marshal (SFM) has made changes to the 2010 edition of the California Building Code (CBC), based on the 2009 International Building Code (IBC).  The entire text of the changes is available online at: 
You might note that the title of this document reads:
FINAL EXPRESS TERMS FOR PROPOSED BUILDING STANDARDS OF THE OFFICE OF THE STATE FIRE MARSHAL REGARDING THE 2010 CALIFORNIA BUILDING CODE CALIFORNIA CODE OF REGULATIONS, TITLE 24, PART 2 2010 INTERIM RULEMAKING CYCLE
However, a representative of the SFM indicated that these changes to the regulations have formally been adopted by the California Building Standard Committee.  You may wish to verify this on your own but I am assured that this is now a part of the new California Fire Code. 
I’ve copied and pasted below the specific section of the referenced document:

CHAPTER 30 - ELEVATORS AND CONVEYING SYSTEMS
3006.4.1 Automatic sprinkler system. Automatic sprinklers shall not be required to be installed in the elevator hoistway, elevator machine room, elevator machinery space, elevator control space, or elevator control room where all the following are met:
1.  Approved smoke detectors shall be installed in the elevator hoistway, elevator machine room, elevator machinery spaces, elevator control spaces, or elevator control rooms and connected to the building fire alarm system in accordance with Section 907. 
2.  Activation of any smoke detector located in the elevator hoistway, elevator machine room, elevator machinery space, elevator control space, or elevator control room shall cause the actuation of the building fire alarm notification appliances in accordance with 907.
3.  Activation of any smoke detector located in the elevator hoistway, elevator machine room, elevator machinery space, elevator control space, or elevator control room shall cause all elevators having any equipment located in that elevator hoistway, elevator machine room, elevator machinery space, elevator control space, or elevator control room to recall nonstop to the appropriate designated floor in accordance with CCR Title 8, Division 1, Chapter 4, Subchapter 6, Elevator Safety Orders.
4. The elevator machine room, elevator machinery space, elevator control space, or elevator control room shall be enclosed with fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 712, or both. The fire-resistance rating shall not be less than the required rating of the hoistway enclosure served by the machinery. Openings in the fire barriers shall be protected with assemblies having a fire protection rating not less than that required for the hoistway enclosure doors.  The exceptions to Section 3006.4 shall not apply.
5.  The building fire alarm system shall be monitored by an approved supervising station in accordance with 907.
6.  An approved sign shall be permanently displayed in the elevator machine room, elevator machinery space, elevator control space, or elevator control room in a conspicuous location with a minimum of 1½ inch letters on a contrasting background, stating: NO COMBUSTIBLE STORAGE PERMITTED IN THIS ROOM  By Order of the Fire Marshal [or name of fire authority]
This is great news as most in our industry have long argued against having machine rooms, control rooms and hoistways sprinkled and the power shunt-tripped.  I’m proceeding with the engineering of a number of elevator major alterations where we are verifying or correcting the fire-resistive nature of the elevator spaces and removing all of the sprinklers. 
As always, I must qualify that you should independently verify all code questions with the proper authorities having jurisdiction. 
Cheers,
Your Code Reporter
Rich Blaska

Monday, June 6, 2011

Rope Brakes, Platform Guards & Shallow Pits

I always knew them as toe guards.  Like many things in elevators, the codes and AHJs have different names for things than I had known them to be.  Spreader brackets are actually called “tie brackets.”  Sump pumps are called “water removal systems.”  We won't even go into what I learned as the name for hoistway door unlocking devices - which are disallowed in California anyway.  

Toe guards are called "Platform Guards (Aprons)" in ASME A17.1, section 2.15.9 as well as in CCR Title 8, Rule 3033(i).  I guess calling them toe guards comes from the perspective of an elevator person who might run cars up and down on hoistway access and without the toe guard, it would seem a lot easier to run the platform down on your toe if your were absent minded enough to stick your foot over the edge of the hoistway sill.  There was probably even a point early in my career were I actually thought this was the purpose of a platform guard – which is what I will call it that for the rest of this blog. 

As I'm sure all of you know, the real purpose of a platform guard is to prevent elevator passengers from going down the hoistway in the event they become entrapped in an immobilized elevator.  In brief, what happens is that an elevator malfunctions and comes to rest above a floor.  The passenger attempts to exit the car by forcing open the doors and climbing out to the floor below.  For example, say the car is 4 feet above the landing and it is an older car not equipped with a door restrictor device.  Depending on the door operator, it may be fairly easy to palm the car door open.  It wouldn't take too much trial and error to figure out how to open the hoistway door for most systems; usually it's a matter of pulling on the pickup rollers or pushing on the roller lever to release the swing door interlock. 

Then what happens is the passenger attempts to let themselves down to the  floor below by hanging onto the car sill and hoisting themselves down.  This is the rub.  If you’ve ever suspended yourself by your hands you know what happens.  Your body will rotate forward toward the car platform due to the natural location of your body’s center of gravity.  And where would that leave you – under the platform well within the hoistway.  The plan was to lower oneself down to the floor but instead the hapless passenger finds themselves inside the hoistway sill and down they go…  This is, I believe, the most common cause of death or major injury in elevator accidents.

Thus, the platform guard!  I haven’t done the research to be able to tell you when this essential safety feature was added to the code (Dee, do you know?).  I see early 20th century elevators all the time with no platform guard, running, perfectly legally as this device was never made a retroactive requirement.   The code had been consistent for probably half a century requiring a platform guard with a height of “not less than the depth of the leveling or the truck zone, plus 3 inches.”  The problem is that with a 7 foot typical entrance, that would leave ample room for one to get out of a car and still go under the platform guard and down the hoistway.

As no doubt all of you know, starting with the ASME A17.1-2000 code the ascending car overspeed and unintended car movement (ACO-UCM) protection has been a requirement.  The platform guard section, 2.15.9, was modified to take into account the new ACO-UCM provision with the added requirement for a 48 inch platform guard.  The logic here is that 48 inches is the maximum allowed car travel upon activation of ACO-UCM.  The affect of this new code is that essentially all new traction elevators will have 48 inch platform aprons and pit deep enough to accommodate them.

All right, here’s the original reason I started this blog.  How does all of this play out when altering an existing elevator to add ACO-UCM?  There are five (5) alteration events that trigger the requirement to add ACO-UCM (Can you name these?  If you give up, go to my website articles to find the answer).   It is widely believed that when altering an existing elevator and ACO-UCM is added that a 48 inch platform apron is also required.  Not true. 

This gets to a very common error in reading the elevator code.  When altering an existing elevator, people will often automatically reference the full body of the current elevator code, A17.1, Part 2 or 3.  Wrong.  When altering an existing elevator one first must go to what local or state codes that applies.  In California, one must start with CCR Title 8 which in turn currently references ASME A17.1-2004, Alterations, Section 8.7.  This section will send you wherever you will need to go for any work performed, based on what is being altered.

In our discussion here, for instance, say the work is the classic new fixtures, door equipment and controls.  The existing elevator is a Ward-Lenard system with a motor-generator and a DC motor on a geared machine.  The alteration includes replacing the M-G with a Vector AC system and installing a new AC motor on the machine.  One of the sections you will have to go to is 8.7.2.27.5 Change in Type of Motion Control.  To confirm this go to A17.1, Part 1, Section 1.3 Definitions, “control, motion” which lists and defines all of the different types of motion control.  The elevator will be modified from a “control, generator field” to a “control, variable voltage, variable frequency (VVVF).”

Note section 8.7.2.27.5(e) sends you to section 2.19 ACO-UCM.  This is the most common trigger that requires the addition of an emergency brake, which if most often met when the machine is being retained by adding a rope brake.  Further note that nowhere in section 2.19 does it send you to section 2.15.9, the requirement for a 48 inch platform guard.  Nor does any other part of section 8.7 send you there for the scope of work described.  The authors of the code were very clever in how they constructed these code revisions so as not to create a trap whereby one would be required to deepen a pit simply because one wants to install new controls and motor on an existing elevator. 

There are a number of alteration sections in 8.7 that do send you to 2.15.9, such as 8.7.2.15.2 and 8.7.2.16.4.  These clarify the requirement that one “shall conform to 2.15.9 only to the extent the existing pit shall permit…”  Section 8.7.2.27.5 probably should include this same language but it doesn’t.  I make it a practice to do it anyway – install a new platform guard of the maximum length up to 48 inches, to the extent the existing pit depth will allow.   

Another place this language should be included, but it isn’t, is section 8.7.2.15.1 Alterations to Car Frames and Platforms.  That section simply sends you to 2.15 (which obviously includes 2.15.9).  So, what does that mean?  If one alters a platform, say cuts off 6 inches of the leading edge so as to install power-operated doors, does that then require you to deepen the pit so as to install a 48 inch platform guard?  Also, what if you install a complete new platform on an existing elevator?  Curiously, there is no language in 8.7 that specifically address a new platform, only alterations to car frames and platforms.  I assume that section 8.7.2.15.1 includes replacing the platform as well as altering one.  I recommend getting a clarification from your AHJ for this code omission.  The times I’ve done that the inspector rightly uses the logic clearly set out elsewhere in the alteration section and accepts that a platform apron of the maximum length be installed.

My business, Smart Elevator Tech, LLC, manufactures and supplies unique elevator products that I have invented, such as the Retracta Ladder®, Low-Profile Fishplate™ and a Deflector Sheave Isolator™.  I’m beginning to get a number of requests to invent a viable retractable platform apron.  I’ve given it some thought and, at least for the moment, have decided to pass.  First, why would anyone need one as they would not be needed in an alteration – as I’ve just shown.  For new construction, all companies would have the same requirement and should be able to specify the necessary pit depth that will be built.  Finally, there are many complications to designing a rise and fall or hinged platform apron that would be viable.  It would have to be activated with each run to the lowest landing, which is more often the lobby – the highest traffic landing.  There would be huge wear factors.  It would have to be failsafe, probably switched so the elevator couldn’t run if the device failed (or simply wore out).  And that’s just the beginning of the problems with such a device.

Cheers,
Your Code Reporter
Rich Blaska

Monday, February 14, 2011

Rope Grippers and the State

The issue of the requirement to provide Ascending Car Overspeed and Unintended Car Movement Protection - Section 2.19 on alterations has always been a little confusing and somewhat controversial.  I had written an article about this on my website some years ago, which I’ve just updated:  http://www.blaska.com/rope_brake.htm.   

With the time that had passed since California has adopted (by reference) the ASME A17.1-2004 code, most of us are now up to speed on what triggers this requirement when altering an elevator.  Probably the only remaining questions are:
·         what product to use
·         how to mount it
·         does it require engineering

As to what product to use, unless you are installing a new gearless machine, probably the best solution is to install a rope brake.  Some of the rope brakes currently available are the Hollister-Whitney Rope Gripper™, the BODE Rope Brake or the Draka Sure Stop™.  The new PMAC gearless machines now all have the emergency brake built in, an ideal solution.  Hollister-Whitney has begun to offer some of their traditional geared machines with integral factory mounts for their Rope Gripper™.  But if you are retaining the machine, this will usually mean mounting a rope brake of some type in some place.

How to mount a rope brake can be quite simple or very involved.  I wrote about this in some detail in my article, http://www.blaska.com/rope_brake.htm, so I won’t repeat it here. 

Does mounting a rope brake require engineering?  At least in California, I thought the answer was no or not necessarily.  It was my understanding from the principal engineer, back when A17.1-2004 was adopted, that full engineering submission was not required.  However, if the inspector suspects the installation and requests engineering, then it must be supplied.  This may have changed.  Currently we are seeing, as far as we can tell, that all Southern California Cal/OSHA - Elevator Unit offices are requiring specific installation engineering, wet signed by a California licensed professional engineer.  This must be supplied at the time of the final inspection if not submitted earlier. 

Based on an email thread I’ve seen, it appears Cal/OSHA - Elevator Unit offices throughout the state may now or will soon be requiring full engineering of non-factory installed rope brake installations.  On alterations, this engineering apparently is to include calcs on not just the mounting brackets or framework but also that to which it is attached.  For instance, if the rope brake is mounted on channels that are then through-bolted to the existing machine beams, those machine beams must be certified for the rope brake loading.  (Actually, the machine beams will never see loads from a rope brake that are greater than exerted by the base elevator system – but this appears to be the requirement.)  As to the criteria, for example if a Group II elevator is altered to include the addition of a rope brake, then the alteration must comply with Group IV criteria – meaning A17.1-2004.  This means that all that is altered must comply with the criteria of Group IV / A17.1-2004 including the loading and strength standards. 

You might want to check with your local Cal/OSHA - Elevator Unit office as to what they will require for your alteration, including whether formal engineering is required.  If it is, find out whether it should be submitted in advance or simply available to the inspector at the time of the final inspection. 

Some would argue that engineering is a good idea even if the state doesn’t mandate it.  The rope brake loading varies from 4,000 lbs. to 16,000 lbs. – not an inconsiderable amount. 

If anyone out there has any additional information on this topic, I would be grateful to hear it.  Feel free to call me (415) 819-5744 or email me at rich@blaska.com.  Let me know if you prefer the information to be added to this blog or kept in confidence.  Also, feel free to write a comment by clicking the link below (it would let me know someone is reading these…). 

Cheers,
Rich Blaska

Tuesday, January 11, 2011

"FOR CAUSE” & “SPECIAL ORDERS"

Today we have a guest post from Dee Swerrie:

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“FOR CAUSE” & “SPECIAL ORDERS”
After reading Rich's Blog, I think a few words regarding, “for cause” could well be in order.  Also a few about “special orders” as “for cause” often generate them.  What I am about to say is based on my experience and is not necessarily how the current Elevator Principal Engineer, Debbie Tudor, may feel or mean by the same phrases.  Possibly, if she reads this and has the time, she will share how she interprets and applies them.
Keep in mind:
  1. Elevator conveyances are man made vertical transportation devices.  Man made devices, as all of us know, sometimes run into problems performing as they are intended to for various reasons.  Sometimes, even when they function as intended, it becomes obvious that there is a better and/or safer way to accomplish the same thing.  Following prolonged operation, wear and tear effects cause unintended problems.  Sometimes a device fails and needs to be replaced.  For a multitude of reasons some changes not covered by an existing order (section) may be necessary.
  2. Elevator codes, rules, regulations, and jurisdictional authority's, all came about years after the elevators, or “lifts”, became recognized and acceptable vertical transportation devices.  Why?  “For cause”!  Elevators and elevator enclosures were involved with people getting hurt!
   Remember, the purpose of taking jurisdiction and promulgating safety codes or orders is for an important reason.  That reason?  ̶“SAFETY” ̶  Elevator Inspectors do more than just inspect elevators for code compliance.  Actually that is the easier part of the job.  The real reason the inspector visits each elevator each year, or more frequently, is to determine if it is safe for the unit to remain in use.  ̶“SAFETY” ̶  I say this, not to minimize the codes and rules promulgated to which elevators must be be constructed and maintained.  Actually the codes, rules, or orders, do provide elevators that seldom need something unique, but it happens, thus  ̶“FOR CAUSE” ̶.
    An example or so: 
  1. An individual was observed opening a sliding hoistway door and falling into the pit on a quite old APB passenger elevator. A competent investigation determined the old interlocks were worn and faulty.  Also determined was the fact that the wooden door jamb was worn and sagging.  The AHJ ordered the owner to install new approved interlocks on all landings, and to have the door frames refurbished to ensure the doors were properly hung and operating.  “For cause!”  It did not need to state “for cause” on the order; the reason was quite obvious to every one concerned.
  2. An individual was observed holding the sliding doors of a relatively up to date elevator installation of a Selective-Collective passenger elevator from completely closing.  Then the individual slid the door open to step into the car but instead stepped  into a  void and fell.  A competent investigation determined that  there had previously been some problems with the elevator getting stalled.  The service mechanic had found a faulty door interlock contact and fixed it and since then elevator had functioned quite well.  The investigator delved deeper and determined the elevator was older than it appeared, having been installed in the late forties and since been modernized.  The mechanic when fixing the elevator following the call back had found a second set of contacts in the interlock, that solved his problem,  just change the conductors to the unused contacts and all was well.  The AHJ ordered that the elevator be provided with new, up to date, approved interlocks.  The AHJ allowed for a second option: remove all interlocks, remove all second sets of contacts, refurbish the interlocks leaving out the second set of contacts, prior to reinstalling the interlocks.  “For cause”
    Two similar occurrences, but for differing causes.  In the first case it was an older building with much wood construction and the interlock were old and obsolete.  The service company had to have replacement parts fabricated, and all in use had the contacts bent some varying amounts to make things work.  In the second case the building was in quite good condition being mostly concrete construction.  However the elevators installed had dual function interlocks.  Many younger elevator mechanics do not know, or forget, that the older car switch elevators that had an night time feature to allow automatic operation; that during the time the operator was running the elevator the interlock would make up at 4 inches, but under automatic operation the closed position for the elevator doors was less than ½ inch, therefore the double set of contacts in the interlock.  Of course with the closed position of car doors being two inches or less, no one was aware that the car could start prior to the hoistway doors being closed and locked.  The person holding the doors from closing held them within that 4 inch distance and as soon as the door contact made, the car left the landing, and the person could open the doors and step in.  Incidentally, in California the AHJ mandated all elevators under the control of elevator operators had to have a pawl arrangement fastened to the leading edge of the hoistway door near the bottom and a bracket fastened to the sill which would keep any one from pulling the doors open until after they were fully closed and locked to prevent what happened in the example given.    
    Another case comes to mind of a basement traction machine that was observed to be lifting itself off of the floor somewhat when the elevator started to run.  A valid reason for an order to correct? – For cause?  What say you?
    If you have a copy of Labor Code Section 7300 et seq., the chapter directly applicable to Elevators, you see in section 7318 that the division may prescribe and enforce special orders as well as general orders.  The history note indicates this order was enacted in 1937.  I rather think that that in itself is an indication that the need for special or “for cause” orders was recognized.  Probably soon following the commencement of inspecting and enforcement of the original elevator safety orders in 1920. 
   Browsing thru the Labor Code, note that LC Section 6309 authorizes the division to investigate, even on its own motion, if it hears of anything  indicating unsafe  conditions at a facility.  Normally such conditions come to the attention  of the division  through complaints but not always. LC Section 6313 is another interesting law that may be invoked by the division.  It pertains to the investigation of accidents.  LC Section 6430 is also interesting as it pertains to the falsely reporting of compliance with orders. 
    As with all laws, enforcement of every law that exists is not always the case, but if there is an accident, all the laws are available to the authority.
   A word about LC 7318.  I have no idea how or if Principal Elevator Engineer Debby Tudor intends to use it.  I do know that when I was Principal, I kept tight control on its use.  I also used some of the Labor code laws to good effect.  But with discretion.  There are times that a special order is necessary.  However indiscriminate use can cause problems and that is why I felt it best to maintain tight control. 

Dee Swerrie

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Thanks Dee.  Again, if for no other reason but to show that someone out there is reading this, please feel free to leave comments about this blog, past blogs, or anything that's on your mind regarding conveyances, codes, trends, etc.

Cheers,
Rich Blaska