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BCC Ruling No. 96-10-493

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BUILDING CODE COMMISSION DECISION ON B.C.C. #96-10-493

IN THE MATTER OF Subsection 24(1) of the Building Code Act, 1992.

AND IN THE MATTER OF Article 7.4.2.1. of the Revised Regulation of Ontario 1990, Regulation 61, as amended by O.Regs. 400/91, 158/93, 160/93, 383/94 and 20/95 (the "Building Code").

AND IN THE MATTER OF an application by Mr. Ross A. Smith, President, Aon Inc. for the resolution of a dispute with Mr. Jeffrey Chalmers, Chief Building Official, City of Peterborough concerning whether the floor drains in a three level open air parking garage can be connected to the storm drainage system, at King Street Parkade, King Street and Louis Street, Peterborough, Ontario.

APPLICANT

Mr. Ross A. Smith
Aon Inc.
Peterborough, Ontario

RESPONDENT

Mr. Jeffrey Chalmers
Chief Building Official
City of Peterborough

PANEL

Mr. Roy Philippe
Ms. Lesia Beznaczuk
Ms. Susan Friedrich

PLACE

Toronto, Ontario

DATE OF RULING

April 15th, 1996

APPEARANCES

Mr. William P. Lett
Architect (Partner)
Lett/Smith Architects
For the Applicant

Mr. Jeffrey Chalmers
Chief Building Official
AND
Mr. Stephen Gould
Plumbing Inspector
City of Peterborough
The Respondents

RULING

  1. The Applicant

Mr. Ross A. Smith, President is an applicant for a permit under the Building Code Act, 1992 to construct a three level open-air parking garage of approximately 6624 m? per floor, at King Street Parkade, King Street and Louis Street, Peterborough, Ontario.

  1. Description of Constrution

The subject building is a non-combustible two storey open-air parking garage of approximately 6624 m? in building area. The third level is an open roof deck that is used for parking vehicles.

Hose bibs have been provided for the washing down of all floor levels. The designer proposed to connect all floor drains directly to an existing storm drainage system. The site is presently being used as a surface parking lot that drains to the storm system.

  1. Dispute

The dispute between the Applicant and Respondent concerns sufficiency of compliance with the technical requirements of Article 7.4.2.1. of the Building Code. At issue is the fact that a surface parking lot, or the open roof deck of a parking garage may be drained to a storm system while the covered floors of a parking garage must be connected to a sanitary drainage system.

  1. Provision of the Building Code

Article 7.4.2.1. Connections to Sanitary Drainage Systems

  1. Every fixture shall be directly connected to a sanitary drainage system, except that

    1. drinking fountains may be

i. indirectly connected to a sanitary drainage system, or

ii. connected to a storm drainage system provided that where the system is subject to backflow, a check valve is installed in the fountain waste pipe,

    1. laundry plumbing appliances may be indirectly connected to a sanitary drainage system,

    1. fixtures or plumbing appliances, other than floor drains, that discharge only clear water waste may be connected to a storm drainage system,

    1. the following devices shall be indirectly connected to a drainage system

i. a device for the display, storage, preparation or processing of food or drink,

ii. a sterilizer,

iii. a device that uses water as a cooling or heating medium,

iv. a water operated device,

v. a water treatment device, or

vi. a drain or overflow from a water system or a heating system,

    1. fixtures that have a hydraulic load of not more than 1 1/2 fixture units may be connected to a vertical section of a circuit vent provided

i. the fixtures are located in the same storey as the fixtures served by the vent pipes,

ii. not more than 2 fixtures are connected to the vent pipe, and

iii. where 2 fixtures are not connected to the vent pipe, the connection is by means of a double sanitary TY fitting,

    1. fixtures that have a hydraulic load of not more than 1 1/2 fixture units may be connected to the vertical section of a yoke vent provided

i. not more than 2 fixtures are connected to the vent pipe, and

ii. where 2 fixtures are connected to the vent pipe, the connection is by means of a double sanitary TY fitting, and

    1. fixtures may be connected to a vent stack provided

i. the total hydraulic load of the connected fixtures does not exceed 8 fixture units,

ii. at least 1 fixture is connected to a vertical portion of the vent stack and upstream of any other fixtures,

iii. no other fixture is connected down-stream of a water closet, and

iv. all fixtures are located in the lowest storey served by the vent stack.

  1. The connection of a soil or waste pipe to a nominally horizontal soil or waste pipe or to a nominally horizontal offset in a soil or waste stack shall be respectively at least 1.5 m (4 ft 11 in) measured horizontally from the bottom of a soil or waste stack or from the bottom of the upper vertical section of the soil or waste stack that

a. receives a discharge of 30 or more fixture units, and

b. receives a discharge from fixtures located on 2 or more storeys.

  1. No other fixture shall be connected to a lead bend or stub that serves a water closet.

  1. Applicant's Position

The Applicant proposed to connect the floor drains from each of the three levels directly to an existing storm drainage system. The Applicant submitted that at issue is whether there is any difference in the waste water generated on the lower two floors (i.e. Levels P1 & P2) from that generated at the roof deck (Level 3).

The Applicant submitted that the intent of the Building Code would be met if all the garage floors were connected to the storm drainage system.

  1. Chief Building Official's Position

The Respondent submitted that Sentence 7.4.2.1.(1) of the Building Code states that every fixture shall be directly connected to a sanitary drainage system. Fixture is defined in Article 1.1.3.2. and the definition includes floor drains. Clause (c) of 7.4.2.1.(1) allows for fixtures other than floor drains to discharge clear water waste to a storm drainage system. Clear water waste is also defined in Article 1.1.3.2.

The Respondent submitted that the reason for non-acceptance of the applicants proposal is that the drains serving the first and second floor of the parking garage are floor drains and therefore must be connected to the sanitary drainage system. The Respondent also submitted that it is questionable whether or not the discharge through these drains could be considered as clear water waste.

  1. Commission Ruling:

It is the decision of the Building Code Commission that floor drains in the three level open air parking garage connected to the storm drain system provides sufficiency of compliance with Article 7.4.2.1.(1)(c) of the Building Code.

  1. Reasons:

There is little difference between the waste water generated on the lower two parking floors and the waste water generated on the roof.

The parking garage will not be used for other purposes other than storage of automobiles.

Dated at Toronto, this 15th day, in the month of April, in the year 1996, for application number 1996-11.

Roy Philippe

Lesia Beznaczuk

Susan Friedrich