Upload
others
View
3
Download
0
Embed Size (px)
Citation preview
Spring 2019Delaney Seeburger
California Polytechnic State University
Prescriptive◦ Structural◦ Flammability◦ Suppression◦ Alarm and Detection◦ Smoke Control◦ Egress
Performance Based◦ Design Fires◦ Tenability◦ FDS◦ Human Behavior◦ Pathfinder
Slide 2
Slide 3
Slide 4
Fire Resistance
Slide 5
TYPE I TYPE IIBuilding Element A A
Structural FrameIncluding columns, girders, trusses 3 1
Bearing wallsExteriorInterior
33
11
Nonbearing walls and partitionsExteriorInterior
See Table 602
Floor construction Including supporting beams and joists 2 1
Roof constructionIncluding supporting beams and joists 1.5 1
Building Element Resistance RatingCorridors 1 hourStairways 2 hour
Doors 20 minute
Occupancy Interior Exits Corridors RoomsA-3 B B CB, M B C CR-2 C C C
CBC Table 601CBC 510.2
CBC 1020.1
CBC 1023.2
CBC 716.5.3
CBC Table 803.11
Occupancy A-3 B M R-2 S-2A-3 N 1 1 1 NB ---- N N 1 1M ---- ---- N 1 1
R-2 ---- ---- ---- N 1S-2 ---- ---- ---- ---- N
Slide 6
CBC Table 508.4
Slide 7
Floor Area (ft2) Type I-A (ft2) Type II-A (ft2)First 33,100 UL --
Second 17,760 -- 72,000Third 17,800 -- 72,000
Height (ft) Type I-A (ft) Type II-A (ft)65 UL 85
Floor OccupancyFirst Assembly (A-3); Business (B); Mercantile (M); Storage (S-2)
Second – Fifth Residential (R-2)
CBC Table 504.3
CBC Table 506.2
Wet Pipe Automatic Sprinkler and Standpipe Risers◦ Sprinkler – 6”◦ Standpipe – 4”
Hazard Classification◦ Light (LH)◦ Ordinary I and II (OH-1/OH-2)
Preaction System
Slide 8
Slide 9
Occupancy Density (gpm/ft2) Area (ft2) HSA (gpm) Duration (min)
LH 0.085 2150 100 30
OH-1 0.15 1075 250 60-90
OH-2 0.195 1606 250 60-90
Slide 10
CBC 11.2.3.3.1-11.2.3.3.4
“The water supply requirements for sprinklers only shall be based upon the room that creates the greatest demand.”
Slide 11
Slide 12
LH - 8 sprinklers
Water SupplyLH - 5 sprinklers
OH2 – 16 Sprinklers
Two Fire Alarm Control Units (FACU) Addressable Signaling and Notification Line Circuits – Class B
Slide 13
Slide 14
Shutdown HVAC Close fire/smoke dampers Release door holders
Slide 15
Smoke Control
FloorPower (AH) 1 2 3 4 5
Required 60 3 3 3 3Provided 70 7 7 7 7
Secondary Power
Slide 16
First Floor
Second Floor
Type of Room Occupancy Classification Occupant Load Factor (ft2/occupant)
Study Areas A-3 15
Offices B 100
Market M 60
Dwelling Units R-2 200
Storage/Service S-2 300
Slide 17
𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂 𝐿𝐿𝐿𝐿𝑂𝑂𝐿𝐿 =𝐴𝐴𝐴𝐴𝐴𝐴𝑂𝑂 𝐿𝐿𝑜𝑜 𝑅𝑅𝐿𝐿𝐿𝐿𝑅𝑅 (𝑜𝑜𝑂𝑂2)
𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂 𝐿𝐿𝐿𝐿𝑂𝑂𝐿𝐿 𝐹𝐹𝑂𝑂𝑂𝑂𝑂𝑂𝐿𝐿𝐴𝐴 ( ⁄𝑜𝑜𝑂𝑂2 𝐿𝐿𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂)
Floor Occupant Load (persons)
First 40
Second 60
Third 60
Fourth 60
Fifth 60
CBC Table 1004.1.2
Slide 18
Occupancy Travel Distance (ft)
A-3, M, R-2 250
B 300
S-2 400
Width (in) Egress Capacity (in./person) Egress Capacity (persons)
Residence Doors 35 0.2 175
Elevator Doors 42.5 0.2 213
Stairway Door 35 0.2 175
Stairs 45.5 0.3 152
Corridors 59 0.2 295Occupancy Dead End (ft)
B, M, R-2, S-2 50
CBC Table 1017.2
CBC Table 1020.4
CBC Table 1005.3.1/1005.3.2
Slide 19
Occupancy Common Path (ft)
A, M 75
B 100
R-2 125
S-2 100
CBC Table 1006.2.1
Structural
Suppression
Alarm and Detection
Egress
Slide 20
RSET vs ASET
Slide 21
SFPE Handbook Figure 59.16
Post Office/Market Residential Unit Business Offices
Flammable Liquid Pool Fire Furniture Fire
Slide 22
CO – 1,200 ppm x min
Slide 23
Heat Flux – 2.5 kW/m2 (0.22 Btu/ft2)
Slide 24
Visibility – 4 m (13 ft.)
Slide 25
Central Stairway
Slide 26
Common Ignitable Liquids used as AccelerantsAcetone (lacquers, varnishes, nail polish remover)Ethyl Alcohol (alcoholic beverages, antifreezes)Isopropyl Alcohol (lacquers, rubbing alcohol, lotions)
Slide 27
SFPE Handbook Table A.39
0
500
1000
1500
2000
2500
0 10 20 30 40 50 60 70 80 90 100
Hea
t Rel
ease
Rat
e (k
W)
Time (s)
Acetone Pool Fire
Pool fireNo growth phase
Q”*A = Q → 1058 kW/m2 * (1.4 m)2 = 2073 kW
Slide 28
Slide 29
Slide 30
Slide 31
Maintain Tenability? Time (s)CO Concentration Yes --Thermal Radiation Yes --
Visibility Yes --
Study Room
Slide 32
Slide 33
SFPE Handbook Table A.39
0
10
20
30
40
50
60
70
80
90
0 20 40 60 80 100 120
Hea
t Rel
ease
Rat
e (k
W)
Time (s)
GM27 Polyurethane
Q = αt2α = 0.047 kW/s2
0
20
40
60
80
100
120
140
160
0 100 200 300 400 500 600 700
Hea
t Rel
ease
Rat
e (k
W)
Time (s)
GM27 Polyurethane
Slide 34
Slide 35
Slide 36
Slide 37
Maintain Tenability? Time (s)
CO Concentration Yes --
Thermal Radiation Yes --
Visibility Yes --
Occupant characteristics Pre-evacuation◦ 3 minutes
Movement◦ 4 minutes
RSET◦ Safety Factor 1.5◦ Total 10.5 minutes
Slide 38
SFPE Handbook Table 64.4
SFPE Handbook Figure 58.1
Slide 39
Slide 40
Slide 41
Slide 42
Slide 43
Stairway
Study RoomImmediate Exposure Last Person
Central 185 s 230 sWest 195 s 237 s
Immediate Exposure Last PersonSecond 239 s 248 sThird 196 s 237 s
Fourth 211 s 269 sFifth 185 s 239 s
Slide 44
Ignition at t = 0 s Detector activation at t = 15 s Alarm activation at t = 25 s Last person exits at t = 294 s
(𝑇𝑇𝑇𝑇𝑅𝑅𝐴𝐴𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑+𝑇𝑇𝑇𝑇𝑅𝑅𝐴𝐴𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎 + 𝑇𝑇𝑇𝑇𝑅𝑅𝐴𝐴𝑑𝑑𝑎𝑎𝑎𝑎𝑡𝑡𝑑𝑑𝑎𝑎) ∗ 𝑆𝑆𝑂𝑂𝑜𝑜𝐴𝐴𝑂𝑂𝑆𝑆 𝐹𝐹𝑂𝑂𝑂𝑂𝑂𝑂𝐿𝐿𝐴𝐴 = 𝑅𝑅𝑆𝑆𝑅𝑅𝑇𝑇15𝑠𝑠 + 10𝑠𝑠 + 269𝑠𝑠 ∗ 1.5 = 440𝑠𝑠
Slide 45
Ignition at t = 0 s Detector activation at t = 79 s Alarm activation at t = 89 s Last person exits at t = 326 s
(𝑇𝑇𝑇𝑇𝑅𝑅𝐴𝐴𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑+𝑇𝑇𝑇𝑇𝑅𝑅𝐴𝐴𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎 + 𝑇𝑇𝑇𝑇𝑅𝑅𝐴𝐴𝑑𝑑𝑎𝑎𝑎𝑎𝑡𝑡𝑑𝑑𝑎𝑎) ∗ 𝑆𝑆𝑂𝑂𝑜𝑜𝐴𝐴𝑂𝑂𝑆𝑆 𝐹𝐹𝑂𝑂𝑂𝑂𝑂𝑂𝐿𝐿𝐴𝐴 = 𝑅𝑅𝑆𝑆𝑅𝑅𝑇𝑇79𝑠𝑠 + 10𝑠𝑠 + 237𝑠𝑠 ∗ 1.5 = 490𝑠𝑠
Slide 46
Central Stairway
Study Room
440 s < unknown (> 600 s)
490 s < unknown (> 600 s)
More Modelling Means of Egress Investigate switching out HD for SD
Slide 47
Slide 48
Questions