Facilities Development Division - CA OSHPD · 1/31/2018 · Facilities Development Division...

Facilities Development DivisionCalifornia’s Building Department for Hospitals

NPC Requirements Revisited

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Northridge Earthquake

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Napa Earthquake

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Σ = 37Σ = 55


Relative Capital Investment

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18.0%

62.0%

20.0%

13.0%

70.0%

17.0%

8.0%

48.0%

44.0%

0%

20%

40%

60%

80%

100%

Office Hotel Hospital

ContentsNonstructuralStructural

E. Miranda, 2003


Cost of NPC-3 Compliance in 2007

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Other NPC Challenges

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Other NPC Challenges

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Current NPC Compliance Status

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CBC 2013 Seismic (S1) Map

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SDC D (non-red areas) SDC F (red areas)


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NPC-2

NPC-1NPC-3

NPC-4


§ 129680 (a) It is the intent of the Legislature that hospital buildings that house patients who have less than the capacity of normally healthy persons to protect themselves, and that must be reasonably capable of providing services to the public after a disaster, shall be designed and constructed to resist, insofar as practical, the forces generated by earthquakes, gravity, and winds. In order to accomplish this purpose, the office shall propose proper building standards for earthquake resistance based upon current knowledge, and provide an independent review of the design and construction of hospital buildings.

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NPC Requirements Revisited§ 130005(a) The Office of Statewide Health Planning and Development, hereinafter called the office, shall develop definitions of earthquake performance categories for earthquake ground motions for both new and existing hospitals that are:(1) Reasonably capable of providing services to the public after a disaster, designed and constructed to resist, insofar as practical, the forces generated by earthquakes, gravity, and winds, and in full compliance with the regulations and standards developed by the office pursuant to the Alfred E. Alquist Hospital Facilities Seismic Safety Act.(2) In substantial compliance with the pre-1973 California Building Standards Codes, but not in substantial compliance with the regulations and standards developed by the office pursuant to the Alfred E. Alquist Hospital Facilities Seismic Safety Act. These buildings may not be repairable or functional but will not significantly jeopardize life.(3) Potentially at significant risk of collapse and that represent a danger to the public.

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(b) The office may define other earthquake performance categories as it deems necessary to meet the intent of this article and the Alfred E. Alquist Hospital Facilities Seismic Safety Act.(c) Earthquake performance categories shall also include sub gradations for risk to life, structural soundness, building contents, and nonstructural systems that are critical to providing basic services to hospital inpatients and the public after a disaster.

(f) The office, in consultation with the Hospital Building Safety Board, shall develop regulations to identify the most critical nonstructural systems and to prioritize the timeframes for upgrading those systems that represent the greatest risk of failure during an earthquake.

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Hospital Service Interruptions/Evacuations

Caused by Earthquake Damaged Piping Systems

• Figure 2.2 Summary of damage sustained at 75 "Green" tagged Facilities.

Note: Numbers in the table represent building(s) where the specified type of damage was reported.

The Northridge Earthquake a Report to the HBSB on the performance of Hospitals

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• Figure 2.3 Summary of damage sustained at 21 "Red" and "Yellow" tagged Facilities

Note: Numbers in the table represent building(s) where the specified type of damage was reported.

The Northridge Earthquake a Report to the HBSB on the performance of Hospitals

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Northridge EQ Hospital Water Damage Study

• The objective of the study was to document the failures in fire sprinkler, heating, ventilating and air conditioning (HVAC) and domestic water systems, segregate the failures by date (i.e., Pre & Post 1973), identify deficiencies and recommend corrective measures.

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Hospitals with Water Damage

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63

810

29

7

4

12

13

2

5

13

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Executive Summary. . . • The most significant finding of this study was not the

movement of roof mounted water tanks that sheared pipe connections, but the extensive failures in heating hot water line connections to unbraced duct mounted zone reheat coils (or terminal units), and the significant damage to the fire sprinkler systems caused by differential movements (with respect to other building components) which caused failures in screwed fittings and heads.

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Failure Summary

. . . there were numerous failures in the Post-73 buildings. The failures caused by the movement of roof mounted water tanks were to be expected in the Pre-73 buildings, but they were not expected in the Post-73 buildings. • The new findings are (1) significant damage to Fire

Sprinkler systems, (2) Heating Hot Water pipe connections to HVAC system zone reheat coils and (3), pipe failures due to movement of tanks in the Post-73 buildings.

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Piping Systems: • Where damage occurred in piping systems; it was caused by

excessive pipe movements and differential deflections between the piping and the connected equipment.

• The failures always occurred at fittings. – In general, fittings in welded steel pipe and soldered or

brazed copper lines survived the earthquake without damage.

– Screwed fittings, however, were the source of several failures as threads failed under repeated deflections.

– A few caulked joints in cast iron soil lines pulled apart, and some nonmetallic di-electric couplings separating dissimilar metals failed.

• No failures were discovered in mechanical joint pipe connections.

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Presenter

Presentation Notes

The mechanical joint is based on the stuffing box principle and consists of a bell with a flange cast integrally with it; a cast or ductile iron gland; a rubber gasket and the necessary bolts and nuts. Its design permits considerable deflection as well as longitudinal expansion and contraction in the line.


Fire Sprinkler System: • The fire sprinkler system sustained less damage than

other piping systems in the buildings. – Typical failures were broken C-type clamps,

sheared or loosened lag bolts, fractured cast iron fittings, and a few pipe failures.

– Components failed when differential movements occurred at hard ceilings and walls, where heads struck other building components, and where lines crossed seismic separations.

• Bracing failures (specifically one sided c-clamps used for gravity hangers) contributed to the pipe movement and failures at screwed joints.

• Penetrations through rated corridor or non-rated hard ceilings with inadequate space for movement around the branch pipe, caused significant damage to threaded pipe joints.

• In some buildings, sprinkler heads were damaged or activated when they pounded against adjacent objects and ceiling elements.

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Tanks• The movement of

water tanks due to shearing of anchors, shifting or rocking in (or with their) saddles, saddle failures and spalling of concrete saddles, caused failures at pipe connections. Cedar Sinai Medical Center: Rooftop

tank on the Professional Tower displaced, breaking piping connection and flooding 8th floor

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Heating Hot Water and Chilled Water Coils

• Small HHW coils in terminal units or branch ducts were not braced, and their movement caused hundreds of failures at the small (5/8") pipe connections at the coil nipples.

• Differential movement of large (4" to 8") CHW or HW lines with drops from overhead mains to large floor mounted coils, caused failures within the manufactured coil. Failures occurred at the header stub connections to the small diameter coil pipes.

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2014 Napa Earthquake

Damage to Piping SystemsLeaks where pipe entered in-line coils (Commercial buildings)

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FEMA P-1024Damage

to Fire Sprinklers

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Building corridor water leak – ¾” water pipe brake

Queen of the Valley MC


What non-structural anchorageand bracing of equipment and systems is practical in an existing hospital building constructed prior to 1983?

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1995 CBC Table 16A-O

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1995 CBC Table 16A-O – Part 2

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1995 CBC Table 16A-O – Part 3

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NPC 3/3R

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NPC-3R Illustration 2001CBC

NPC 3/3R – SPC 1 & 2 Buildings

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NPC 3/3R – SPC 3 & 4 Buildings

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Anchorage

Wall studs

Stud to deck connection

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*2001 CBC Requirements

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• 2016 CBC – SPC-4D (Damage Control Category)

• 2019 CBC – NPC-4D?

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HSSA § 130005

NPC 4D Framework

• Delete regulations in Chapter 6, Part 1 that are no longer valid, such as extensions to 2008 to 2013 and beyond that are past. Make Chapter 6 current with on-going extensions, new extensions, etc.

• Revisit SB 499 NPC 3/3R “exemptions” and “extensions”

• Modify NPC 3/3R to delete specified anchorage/bracing, such as cabinets, shelving, etc. not in the patient vicinity or exit wayo Review Table 16A-O for what to keep and what to

exclude

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NPC 4D Framework

• Should NPC 3R be allowed to continue beyond 2030 or should they comply with NPC 3?o Evaluate load patho Exception for suspended ceilings in rooms less than 300

sq. ft. with exceptions for certain rooms

• Modify NPC 4 to delete specified anchorage/bracing, such as cabinets, shelving, etc. not in the patient vicinity or exit wayo Review Table 16A-O for what to keep and what to

exclude

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NPC 4D Framework

• Create new nonstructural performance level: NPC 4Do Three levels Common elements to all three levels:

• Must comply with NPC 3/3R as modified in this code cycle

• Must file an action plan with the Office for bringing all unanchored/unbraced equipment and systems back online, or to provide them in an alternative manner, after a seismic event. This plan will be posted on OSHPD’s websiteoWhat should be included in the plan?

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NPC 4D Framework

Level 1: • Equipment and services needed to provide

emergency services, including diagnostic, treatment, and surgery, shall be anchored and braced, with specified exceptions. The hospital shall determine which services they want to provide after a seismic event in addition to the emergency services. Equipment and services for identified services, with specified exceptions, shall be anchored and braced in accordance with the 1995 CBC or later editions of CBC

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NPC 4D Framework

Level 2: • Equipment and services needed to provide

emergency services, including diagnostic, treatment, and surgery, shall be anchored and braced, with specified exceptions, in accordance with the 1995 CBC or later editions of CBC

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NPC 4D Framework

Level 3:• Shall comply with all common elements specified

above

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NPC 4D Framework

Deadlines:• By January 1, 2024, the hospital owner shall

submit to the Office a complete nonstructural evaluation up to NPC 4 or 4D and NPC 5, for each building to remain in acute care service beyond January 1, 2030

• By January 1, 2026, the hospital owner shall submit to the Office construction documents for NPC 4 or 4D or NPC 5 compliance, that are deemed ready for review by the Office, for each building to remain in acute care service beyond January 1, 2030

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NPC 4D Framework• By January 1, 2028, the hospital owner shall

obtain a building permit to begin construction for NPC 4 or NPC 4D, and NPC 5 compliance of each building that the owner intends to use as a general acute care hospital building after January 1, 2030. Hospitals not meeting the January 1, 2028 deadline set by this section shall not be issued a building permit for any noncompliant building except those required for seismic compliance in accordance with the California Administrative Code (Chapter 6), maintenance, and emergency repairs until the building permit required by this section is issued

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NPC 4D Framework

• Hospitals must be NPC 4D or NPC 4 and NPC 5 by 2030o After January 1, 2020, all remodels and renovations,

or other construction work, shall include anchorage and/or bracing of all equipment and services within the scope of the work that is not in compliance with NPC 4, as modified in this code cycle. Exception: If the hospital has obtained an extension for SPC compliance, the NPC compliance deadlines shall coincide with the approved SPC extension deadlines

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Utilities Serving Compliant Buildings

• Utilities serving compliant hospital buildings (SPC 3, SPC 4, SPC 4D, and SPC 5) through noncompliant buildings (SPC 1 and SPC 2)o Must have a reliable essential electrical systemo Normal power ok to run through SPC 1 and SPC2 if

buildings remain under OSHPD jurisdictiono Potable water ok to run through SPC 1 and SPC if

compliant building is NPC 5 compliant

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Utilities Serving Compliant Buildings

o Chilled water, hot water, steam, etc.??o Heating and cooling

o Medical gases??o Use portable systems in compliant building until

permanent systems are provide/rerouted by some date or when changes/modifications are made to the systems??

o Other utilities??

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Facilities Development Division - CA OSHPD · 1/31/2018 · Facilities Development Division...

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