OBC Practice Exam – House – Tauton Services Ltd.

#1. What is the minimum required number of water closets for a group F, Division 2 occupancy located in a one (1) storey, 600m2 building. The Group F, Division 2 occupancy is located in a suite that is 400m2 in area with occupant load of 18 persons in the suite.

One water closet to serve both sexes

Two water closets to serve both sexes

Two water closets to each sex

One water closet for each sex

#2. An exterior wall that is exposed to precipitation need not be protected in accordance with Section 9.27. or Part 5 where it can be shown that ingress of precipitation will not adversely affect any way of:

the health or safety of the occupants of the building

All above

the operation of building services

the intended use of the building

#3. What is the maximum distance of travel to an egress door from a suite if the occupancy is mercantile

30 m

45 m

40 m

6 m

#4. A door within a public corridor on a floor area of a multi tenant mercantile building is perpendicular to the public corridor and is comprised of two active leafs. These doors must be;

not less than 810 mm wide and 2 030 mm high

not less than 810 mm wide and 1 980 mm high

not less than 610 mm wide and 2 030 mm high

not less than 750 mm wide and 2 030 mm high

#5. Detached garages of less than 55 m² floor area and not more than 1 storey in height may be supported on wood mud sills if the garage construction is:

Wood stud with brick veneer.

any type of construction

concrete block wall

not of masonry or masonry veneer construction

#6. In Table 9.12.2.2., the term "No Limit" means that

the elevation of the underside of the foundation in relation to the finished ground level is not regulated

the elevation of the top of the foundation must be as deep as possible below finished ground level

the elevation of the underside of the foundation can be as shallow as possible below finished ground level

the elevation of the underside of the foundation can be as deep as possible below finished ground level

#7. An exit door serving a two-storey House:

must be inward

sliding door is ok

may swing in the direction of exit travel or inward

must swing in the direction of exit travel

#8. According to Division B, Section 9.23 a joist needs bottom restraint. One of the restraint method that is NOT recognized by the Building Code

toe nailing ends to supports

end-nailing to the header joists

providing blocking between joists

nailing to subfloors to the top of the floor joists

#9. 4. A dwelling unit that contains sleeping accommodations for not more than 2 persons contains:

two bedrooms or bedroom spaces in combination with other spaces

two bedrooms

one bedroom

one bedroom or bedroom space in combination with other spaces

#10. In a house, a guard serving exit stairwell opening between the ground floor and second floor shall be not less than:

1070mm

900mm

965mm

920mm

#11. In a kitchen that is 7 m² in a dwelling unit that is designed to accommodate more than 2 persons, a minimum ceiling height of 2 300 mm must be provided over an area of not less than:

3.15 m²

4.20 m²

2.78 m²

5.25 m²

#12. 4. The function of the of the first plane of protection is to:

intercept and effectively dissipate to the exterior any precipitation that gets past the second plane of protection

prevent condensation in the exterior wall space

minimize the passage of rain and snow into the exterior wall assembly

provide a continuous barrier to air leakage

#13. A house can contain maximum dwelling units of

2 dwelling units

3 dwelling units

4 dwelling units

1 dwelling unit

#14. Eave protection under asphalt shingles applied on slopes of 1 in 3 is to extend up the roof slope a minimum distance of

900 mm and at least 300 mm past the inside face of the exterior wall

1200 mm

900 mm

300 mm

#15. The minimum thickness of panel-type underlay is

6 mm

7.9 mm

9.5 mm

12.7 mm

#16. 1. A summer cottage will be located in Bancroft, Ontario. The long dimension of low permeable 12.5 mm thick wall sheathing will be applied perpendicular to the wall framing. What installation requirement will insure venting of the framing space and exemption from the requirements of Sentence 9.25.5.1.(1)?

A 1/16 in gap between installed sheets

A 2 mm gap between installed sheets

A 2 mm overlap of installed sheets

A 0.2 mm gap between installed sheets

#17. The minimum diameter for nails used for the attachment of stucco lath is;

3.2 mm

2 mm

4 mm

4.5 mm

#18. A proposed new house to be built in Mississauga, window wall ratio is 19%. Electric forced air furnace is used to heat the house. C4 package. The windows would require a thermal conductance, U-value of:

not more than 1.4 W/m²∙K

not less than 1.6 W/m²∙K

not more than 1.6 W/m²∙K

not less than 1.4 W/m²∙K

#19. The maximum clear span between supporting walls of a prescribed reinforced concrete slab is:

2.5 m

2.5 m along the shortest dimension of the slab

2.5 m along the longest dimension of the slab

always determined in accordance with Part 4, “Structural Design”

#20. If radon gas are known to be a problem, Standard SB-9 will apply. Floor drain penetration in a floor-on-ground shall be sealed with:

Flexible sealant in a manner which prevents the upward flow of soil gas without prevention the downward flow of liquid water

Rigid sealant in a manner which prevents the upward flow of soil gas without preventing the downward flow of liquid water

Flexible sealant in a manner which prevents the leakage of soil gas

Ridged sealant in a manner which prevents the leakage of soil gas

#21. When step footing are used, they must have the following configuration:

min. rise of 600 mm and max. run of 600 mm

max. rise of 600 mm and min run of 600 mm

be designed under Part 4

max. rise of 600 mm and max. run of 600 mm

#22. the minimum uniformly distributed live load (UDL) for the attic accessible by a stairway in a House

1.0 kpa

1.9 kpa

0.35 kpa

1.4 kpa

#23. Prefinished galvanized steel siding for Houses must conform to:

CAN-CGSB-93.2-M91

CAN/CGSB-93.4-92

CAN/CGSB-93.3-M

CAN/CGSB-93.1-M85

#24. In determining the distance between points of lateral support for interior and exterior cavity walls, the thickness of the wall is based on·

the sum of the wythes minus the cavity thickness

2/3 the sum of the wythe thickness

% the sum of the wythe thickness

the overall thickness of the wall

#25. What is the minimum nail fastener size for plywood?

38 mm

51 mm

25 mm

20 mm

#26. When the foundation wall of the House is constructed as a prescribed flat ICF foundation wall, the concrete:

must conform to CAN/CSA-A23.1, “Concrete Materials and Methods of Concrete Construction”, with a maximum aggregate size of 19 mm or Part 4, “Structural Design”

must be site-batched

must conform to CAN/CSA-A23.1, “Concrete Materials and Methods of Concrete Construction, with a maximum aggregate size of 19 mm and Part 4, Structural Design”

can be site-batched,

#27. Where the finished flooring consists of other than matched wood strips or ceramic tiles, what is the minimum thickness of plywood subflooring applied over floor joists spaced at 610 mm o.c.?

12.5 mm

18.5 mm

15.9 mm

15.5 mm

#28. A proposed house in zone 1 uses 20% electricity energy and 80% gas energy to heated house. Which table shoud be used?

Table 3.1.1.2.(A)

Any of them above

Table 3.1.1.2.(C)

Table 3.1.1.2.(B)

#29. A combustion air outlet serving a wood burning fireplace shall be,

Located as close as possible to the opening in the face of the fireplace

Equipped with grille

Insulated

Covered with steel mech with maximum opening size of 6 mm

#30. The maximum force permitted to open an interior exit door in a Barrier-Free path of travel is;

38 N

22 N

90 N

45 N

#31. A House occupied year-round has a basement and a single storey with cathedral ceilings attached to roof joists. It is equipped with electric baseboard heaters and has two air circulation fans hanging from cathedral ceilings. What is the minimum nominal thermal resistance of ceiling insulation if the House was constructed in Kapuskasing?

RSI 8.81

RSI 2.80

RSI 4.40

RSI 5.46

#32. What is the minimum shank diameter of casing nails or finishing nails used for fastening sheets of insulating fibreboard finish?

20 mm

2.0 mm

26 mm

2.6 mm

#33. A year round residence is planned for Arnprior. A forced-air furnace with a AFUE of 92% will heat the home. The foundation walls are non-ICF. What is the minimum effective thermal resistance of insulation required to be installed in the above ground walls when the floor-on-ground is insulated to RSI 1.76?

RSI 3.77

RSI 3.52

RSI 4.23

RSI 4.75

#34. The reinforcing steel in a prescribed reinforced concrete slab must conform to:

Grade 400 steel

Grade 400 steel conforming to CSA-A23.1-04, “Concrete Materials and Methods of Concrete Construction”

the design under Part 4, “Structural Design”

Grade 400 steel conforming to CSA-G30.18-M, “Billet-Steel Bars for Concrete Reinforcement”

#35. A scissor stair has both exit doors opening in a lobby in an apartment building. Since the floor is unsprinklered, the lobby is enclosed with afire separation having a 1 hour fire resistance rating. The lobby is 2 m above the ground level and the distance of travel from the exits to the outdoors is 12 m.

the lobby must be sprinklered

only one of the exits can has exit door open to the lobby

a lobby is not permitted serving residential suites

the lobby complies with the code requirements

#36. Is the foundation wall considered as lateral supported at bottom?

No

Dwelled to the bearing footing

Yes

Supported at footing by shear key

#37. Struts used to provide intermediate support for roof framing members must be inclined by:

45° to the horizontal

not less than 45° to the horizontal

not more than 45° from the horizontal

45° to the vertical

#38. Plywood sheathing, on a flat roof that will be used as a patio with a waterproof vinyl roof and walking deck membrane system that complies with CAN/CGSB-37.54, “Polyvinyl Chloride Roofing and Waterproofing Membrane”, when the roof joists are spaced at 406 mm o.c. must have a minimum thickness of:

15.5 mm with edges supported

15.5 mm with edges unsupported or supported

15.9 mm with edges supported

15.9 mm with edges unsupported or supported

#39. A second storey window in a lounge area in a seniors' apartment building (i.e., Group C Residential and NOT Group B lnstitutional)extends to within 300 mm of the finish floor. That window is required to be

only made of wired glass

protected with a guard

made of tempered safety glass

may be made of regular glass

#40. A cinema has fixed seating for 700 people. What is the minimum number of spaces required for wheelchairs?

35

28

21

16

#41. What is the minimum length of casing or finishing nails to fasten plywood interior finish material?

25 mm

80 mm

20 mm

38 mm

#42. A handrail is required to have a minimum clearance to the wall it is attached to is:

50 mm maximum

no requirement

50 mm minimum and 100 mm maximum

50 mm minimum

#43. Exterior door assemblies leading to dwelling units from the exterior, an attached garage or other ancillary space or a storage garage need not conform to the “Resistance to Forced Entry” requirements of Articles 9.7.5.2.(3) to 9.7.5.2.(7) provided they conform to:

CAN/CGSB-82.1-M89, “Sliding Doors’

CAN/CSA-0132.2-M1997, “Wood Flush Doors’

CAN/CGSB-82.5-M88, “Insulated Steel Doors”

ASTM F476-84(1996), “Standard Test Methods for Security of Swinging Door Assemblies” with a security level of at least 10 as described in the Annex to the said Standard

#44. A single top plate is permitted in a loadbearing wall;

if the concentrated loads from the supported members are not more than 50 mm from the supporting stud

for interior walls only

if the supported members are not more than 50 mm from the stud

for exterior walls only

#45. Plywood panels used as cladding, when applied directly to studs spaced at 610 mm o.c. must not be less than:

11 mm thick when the face grain is at right angle to the studs

8 mm thick when the face grain is parallel to studs

6 mm thick when the face grain is at right angle to studs

8 mm thick when the face grain is at right angle to the studs

#46. According to table 9.8.7.1, if a curved stair is 1000 mm in width within a dwelling unit, the required hand rail to be:

2

1 or 2 depending on the width

1

None

#47. The exit door serving the House

must swing in the direction of exit travel

may swing in the direction of exit travel or inward

must swing inward

must in the direction of exit travel and inward

#48. The handrail on the stair between the first and second floor of the House must be continuous throughout the length of the except at the:

change of direction

doorway

landing

newel post

#49. An engineering office has an area of 93 m2 What is the occupant load for this area?

10

5

20

15

#50. A kitchen that is 7 m2 in a dwelling unit designed to accommodate more than 2 persons the minimum ceiling height of 2 300 mm must be provided over an area of not less than:

2.78 M2

5.25 M2

4,20 M2

3.15 M2

#51. Where the exterior walls of an exit intersect the exterior walls of a building wired glass in steel frames or glass block is required for either the building windows or the exit enclosure windows, where the walls meet at an angle

Less than 135"and the openings are more than 3000 mm horizontally

Less than 135 and the openings are within 3000 mm horizontally

A more than 135"and the openings are within 3000 mm horizontally

Of 135"and the openings are within 3000 mm horizontally

#52. The provisions of Section 9.23 apply only to the following structures (select the most correct answer):

live load cannot exceed 2.4 kPa

framing members spaced at not more than 610 mm o.c. and a maximum live load of not more than 2.4 kPa

framing members spaced at not more than 600 mm o.c.

post, beam and plank construction is proposed

#53. In the House, the openings through the required guard, serving the stairwell opening at the second floor, must be of a size which will prevent the passage of a spherical object having a diameter of:

more than 100 mm

any size if it can be shown that the location and size of the openings do not represent a hazard

less than 100 mm

100 mm

#54. When used as cladding, untreated wood must clear the ground by not less than:

200 mm

150 mm

50 mm

100 mm

#55. In a two storey residential building, the floor assembly to be 30-minute fire serration. What is the minimum required fire-resistance rating for the top storey of an exit stair shaft?

30 min

No fire -resistance rating is required

45 min

1hr

#56. in a Division B Part 9 house, if the space between roof joists in a cathedral ceiling with a slope of 1 in 3 are installed, the ratio of vent area to insulated ceiling area to be provided shall be not less than:

1:450

1:150

No venting required

1:300

#57. A garage may be built without a perimeter foundation wall and footing if;

the floor area is less than 55 m2 and it is not more than 1 storey and the garage is not connected to the house

the floor area is less than 55 m2 and it is not more than 1 storey and the garage is not connected to the house and the exterior walls are not of masonry or masonry veneer.

the floor area is less than 55 m2 and it is not more than 1 storey

the floor area is less than 55 m2

#58. A guard is required around an interior stair that has

more than 6 risers and a difference in elevation greater than 900 mm

more than 6 risers and a difference in elevation greater than 600 mm

6 or more risers

more than 2 risers

#59. A doorway in a Barrier-Free path of travel must be at least;

860 mm wide

900 mm wide

965 mm wide

810 mm wide

#60. Mirrored glass doors conforming to CAN/CGSB-82.6-M, “Doors, Mirrored Glass, Sliding or Folding, Wardrobe” and mirrored glass doors reinforced with a film backing that meet the impact resistance requirements specified in CAN/CGSB-12.5-M, “Mirrors, Silvered” may be used

mechanical room door

bedroom door

on any door to a at the entrance to clothes closets clothes closet

study room door

#61. The minimum roof slope for normal application of asphalt shingles is:

1 in 3

1 in 2

1 in 6

1 in 4

#62. In calculating the actual unobstructed glass area provided by windows and skylights, the Designer and the Plans Examiner:

add the area occupied by the frame and sash to the area of the rough opening

deduct the area occupied by the frame and sash from the area of the rough opening

ignore the area occupied by the frame and sash in the rough opening

need not consider the area occupied by the frame and sash

#63. The minimum length of nails used to fasten 7.9 mm thick wood strip flooring is;

38 mm

50 mm

22 mm

83 mm

#64. In a kitchen that is 7 m² in a dwelling unit. The minimum ceiling height beyond the minimum area that requires a 2 300 mm ceiling height is:

2100 mm

1950 mm

2300 mm

unregulated

#65. The expansion gap between sheets of panel-type roof sheathing must:

not be less than 20 mm

not be more than 20 mm

not be less than 2.0 mm

not be more than 2.0 mm

#66. Wall tile finish on walls around bathtubs and showers must be applied to:

Type X drywall backing

exterior type plywood backing

moisture resistant backing

#67. A gas fired rooftop unit is providing space heating for a office building located in Markham. The building is design in accordance with the prescriptive requirements of Chapter 2 division 3 of SB-10. What is the minimum R Value (in Si units) required for the unheated slab-on grade floors?

2.6 for 1200 mm

1.8 for 900 mm

3.5 for 600 mm

1.8 for 1200 mm

#68. Consider the 7 m2 kitchen in Question 6 above. The minimum ceiling height beyond the minimum area that requires a 2 300 mm ceiling height is:

1 950 mm

2 100 mm

unregulated

2 350 mm

#69. The finished interior floor level in a Group D occupancy is 190 mm below the sliding door or sill while the distance from the finish floor to the ground level is 600 mm. The door must be;

openable only to 100 mm maximum

not restriction

openable only to 200 mm maximum

openable only to 50 mm maximum

#70. Which of the following building is required to conform to energy efficiency requirement?

Farm building

Repair garage

Standalone electrical substations power plants

Indoor heated storage garages

#71. The exterior walls of Houses must be protected from the ingress of precipitation by:

a second plane of protection

a first plane of protection

a first plane of protection or a second plane of protection

a first plane of protection and a second plane of protection

#72. Glass in a 500 mm wide sidelight must be made of

wired glass

safety glass

not regulated

laminated glass

#73. What is the minimum thickness of lumber subflooring applied to joists at 406 mm o.c.?

18.5 mm

17.0 mm

19.0 mm

25.4 mm

#74. A building has 4 pedestrian entrances. How many of those entrances must be Barrier-Free entrances?

2

4

3

1

#75. The minimum turning diameter for a wheelchair in a Special Washroom is

1800 mm

1500 mm

1100 mm

1000 mm

OBC Practice Exam – House

#1. What is the minimum required number of water closets for a group F, Division 2 occupancy located in a one (1) storey, 600m2 building. The Group F, Division 2 occupancy is located in a suite that is 400m2 in area with occupant load of 18 persons in the suite.

#2. An exterior wall that is exposed to precipitation need not be protected in accordance with Section 9.27. or Part 5 where it can be shown that ingress of precipitation will not adversely affect any way of:

#3. What is the maximum distance of travel to an egress door from a suite if the occupancy is mercantile

#4. A door within a public corridor on a floor area of a multi­ tenant mercantile building is perpendicular to the public corridor and is comprised of two active leafs. These doors must be;

#5. Detached garages of less than 55 m² floor area and not more than 1 storey in height may be supported on wood mud sills if the garage construction is:

#6. In Table 9.12.2.2., the term "No Limit" means that

#7. An exit door serving a two-storey House:

#8. According to Division B, Section 9.23 a joist needs bottom restraint. One of the restraint method that is NOT recognized by the Building Code

#9. 4. A dwelling unit that contains sleeping accommodations for not more than 2 persons contains:

#10. In a house, a guard serving exit stairwell opening between the ground floor and second floor shall be not less than:

#11. In a kitchen that is 7 m² in a dwelling unit that is designed to accommodate more than 2 persons, a minimum ceiling height of 2 300 mm must be provided over an area of not less than:

#12. 4. The function of the of the first plane of protection is to:

#13. A house can contain maximum dwelling units of

#14. Eave protection under asphalt shingles applied on slopes of 1 in 3 is to extend up the roof slope a minimum distance of

#15. The minimum thickness of panel-type underlay is

#17. The minimum diameter for nails used for the attachment of stucco lath is;

#18. A proposed new house to be built in Mississauga, window wall ratio is 19%. Electric forced air furnace is used to heat the house. C4 package. The windows would require a thermal conductance, U-value of:

#19. The maximum clear span between supporting walls of a prescribed reinforced concrete slab is:

#20. If radon gas are known to be a problem, Standard SB-9 will apply. Floor drain penetration in a floor-on-ground shall be sealed with:

#21. When step footing are used, they must have the following configuration:

#22. the minimum uniformly distributed live load (UDL) for the attic accessible by a stairway in a House

#23. Prefinished galvanized steel siding for Houses must conform to:

#24. In determining the distance between points of lateral support for interior and exterior cavity walls, the thickness of the wall is based on·

#25. What is the minimum nail fastener size for plywood?

#26. When the foundation wall of the House is constructed as a prescribed flat ICF foundation wall, the concrete:

#27. Where the finished flooring consists of other than matched wood strips or ceramic tiles, what is the minimum thickness of plywood subflooring applied over floor joists spaced at 610 mm o.c.?

#28. A proposed house in zone 1 uses 20% electricity energy and 80% gas energy to heated house. Which table shoud be used?

#29. A combustion air outlet serving a wood burning fireplace shall be,

#30. The maximum force permitted to open an interior exit door in a Barrier-Free path of travel is;

#32. What is the minimum shank diameter of casing nails or finishing nails used for fastening sheets of insulating fibreboard finish?

#34. The reinforcing steel in a prescribed reinforced concrete slab must conform to:

#36. Is the foundation wall considered as lateral supported at bottom?

#37. Struts used to provide intermediate support for roof framing members must be inclined by:

#39. A second storey window in a lounge area in a seniors' apartment building (i.e., Group C Residential and NOT Group B lnstitutional)extends to within 300 mm of the finish floor. That window is required to be

#40. A cinema has fixed seating for 700 people. What is the minimum number of spaces required for wheelchairs?

#41. What is the minimum length of casing or finishing nails to fasten plywood interior finish material?

#42. A handrail is required to have a minimum clearance to the wall it is attached to is:

#43. Exterior door assemblies leading to dwelling units from the exterior, an attached garage or other ancillary space or a storage garage need not conform to the “Resistance to Forced Entry” requirements of Articles 9.7.5.2.(3) to 9.7.5.2.(7) provided they conform to:

#44. A single top plate is permitted in a loadbearing wall;

#45. Plywood panels used as cladding, when applied directly to studs spaced at 610 mm o.c. must not be less than:

#46. According to table 9.8.7.1, if a curved stair is 1000 mm in width within a dwelling unit, the required hand rail to be:

#47. The exit door serving the House

#48. The handrail on the stair between the first and second floor of the House must be continuous throughout the length of the except at the:

#49. An engineering office has an area of 93 m2 What is the occupant load for this area?

#50. A kitchen that is 7 m2 in a dwelling unit designed to accommodate more than 2 persons the minimum ceiling height of 2 300 mm must be provided over an area of not less than:

#51. Where the exterior walls of an exit intersect the exterior walls of a building wired glass in steel frames or glass block is required for either the building windows or the exit enclosure windows, where the walls meet at an angle

#52. The provisions of Section 9.23 apply only to the following structures (select the most correct answer):

#53. In the House, the openings through the required guard, serving the stairwell opening at the second floor, must be of a size which will prevent the passage of a spherical object having a diameter of:

#54. When used as cladding, untreated wood must clear the ground by not less than:

#55. In a two storey residential building, the floor assembly to be 30-minute fire serration. What is the minimum required fire-resistance rating for the top storey of an exit stair shaft?

#56. in a Division B Part 9 house, if the space between roof joists in a cathedral ceiling with a slope of 1 in 3 are installed, the ratio of vent area to insulated ceiling area to be provided shall be not less than:

#57. A garage may be built without a perimeter foundation wall and footing if;

#58. A guard is required around an interior stair that has

#59. A doorway in a Barrier-Free path of travel must be at least;

#60. Mirrored glass doors conforming to CAN/CGSB-82.6-M, “Doors, Mirrored Glass, Sliding or Folding, Wardrobe” and mirrored glass doors reinforced with a film backing that meet the impact resistance requirements specified in CAN/CGSB-12.5-M, “Mirrors, Silvered” may be used

#61. The minimum roof slope for normal application of asphalt shingles is:

#62. In calculating the actual unobstructed glass area provided by windows and skylights, the Designer and the Plans Examiner:

#63. The minimum length of nails used to fasten 7.9 mm thick wood strip flooring is;

#64. In a kitchen that is 7 m² in a dwelling unit. The minimum ceiling height beyond the minimum area that requires a 2 300 mm ceiling height is:

#65. The expansion gap between sheets of panel-type roof sheathing must:

#66. Wall tile finish on walls around bathtubs and showers must be applied to:

#67. A gas fired rooftop unit is providing space heating for a office building located in Markham. The building is design in accordance with the prescriptive requirements of Chapter 2 division 3 of SB-10. What is the minimum R Value (in Si units) required for the unheated slab-on grade floors?

#68. Consider the 7 m2 kitchen in Question 6 above. The minimum ceiling height beyond the minimum area that requires a 2 300 mm ceiling height is:

#69. The finished interior floor level in a Group D occupancy is 190 mm below the sliding door or sill while the distance from the finish floor to the ground level is 600 mm. The door must be;

#70. Which of the following building is required to conform to energy efficiency requirement?

#71. The exterior walls of Houses must be protected from the ingress of precipitation by:

#72. Glass in a 500 mm wide sidelight must be made of

#73. What is the minimum thickness of lumber subflooring applied to joists at 406 mm o.c.?

#74. A building has 4 pedestrian entrances. How many of those entrances must be Barrier-Free entrances?

#75. The minimum turning diameter for a wheelchair in a Special Washroom is

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#4. A door within a public corridor on a floor area of a multi tenant mercantile building is perpendicular to the public corridor and is comprised of two active leafs. These doors must be;