LECT 5 architecture : building construction and material

7/23/2019 LECT 5 architecture : building construction and material

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AAR 2198

BUILDING CONSTRUCTIONAND MATERIAL 3

FIRE PROTECTION

FOR STEEL

STRUCTURE


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FIRE PROTECTION

WHY

do we protect steel

structures from fire?


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FIRE PROTECTION


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FIRE PROTECTION

Primary objectives:

Save lives by allowing evacuation of people

Allow safe access for fire fighters

Protect the building from structural failure


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FIRE PROTECTION

Structural steel can be fireprotected by a variety of

methods including:

1.Concrete encasement

2. Fire resistant boards,

3. Cementitious,4. Sprayed inorganic materials

5. Intumescent coatings.


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FIRE PROTECTION

These methods are commonly referred to as passive fire

protection.

Their function is to insulate the steel in a fire situation and

increase the time before the steel loses its design margin of

safety. This usually occurs at a steel temperature of around400C - 600C.

All commonly used building materials may lose some strength

when exposed to fire. Concrete may spall to exposereinforcement, wood depletes by charring and steel starts to

lose its load bearing capacity.


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FIRE PROTECTION

Each country has its own building regulations and

design codes, which broadly state that the load bearingelements of a building shall be capable of resisting fire

for the advised period without loss of stability in the

event of fire.

The period of fire protection is normally 30 minutes, 60

minutes, 90 minutes or 120 minutes. This duration is

dependent on the building use, type, size and overall

height.


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FIRE PROTECTION

METHODS FOR FIREPRROFING STEEL COLUMNS:

1. Encasement in Reinforced Concrete

2. Enclosure in metal lath and plaster

3. Enclosure in multiple layers of gypsum board

4. Spray-on fireproofing5. Loose insulation fill inside a sheet metal

6. Water-filled box column made of a wide-flange shape

with added steel plates


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Encasement in

Reinforced Concrete

Enclosure in metal

lath and plaster

Enclosure in multiple

layers of gypsum board

Spray-on fireproofing Loose insulation fill

inside a sheet metal

Water-filled box column

made of a wide-flange shape



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Encasement in

Reinforced Concrete


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Enclosure in metal

lath and plaster


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Enclosure in multiple

layers of gypsum board


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Spray-on fireproofing


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Spray-on fireproofing


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Loose insulation fill inside

a sheet metal

(flexible blanket protection

system)


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Water-filled box column

made of a wide-flange shape



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Enclosure in metal

lath and plaster


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Intumescents Coating


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Firetherm Top seal


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Firefilm


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FIRE PROTECTION

METHODS FOR FIREPRROFING STEEL

BEAMS AND GIRDERS:

1. Encasement in Reinforced Concrete

2. Enclosure in metal lath and plaster

3. Rigid slab fireproofing

4. Spray-on fireproofing

5. Suspended plaster ceiling

6. Flame-shielded exterior spandrel girderwith spray-on fireproofing inside


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FIRE PROTECTION

Encasement in

Reinforced

Concrete

Enclosure in metal

lath and plaster

Rigid slab

fireproofing

Spray-onfireproofing

Suspended

plaster ceiling

Flame-shielded exteriorspandrel girder with

spray-on fireproofing inside


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FIRE PROTECTION

METHODS FOR FIRE PROTECTION:

1. Sprays Coating

2. Boards and Similar Casings

3. Lined Steel Sheet Casing4. Intumescents


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FIRE PROTECTION

PRODUCT MANUFACTURER/SUPPLIER LOCAL AGENT


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FIRE PROTECTION


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FIRE PROTECTION

METHODS FOR FIRE PROTECTION:

1. Sprays Coating


3. Lined Steel Sheet Casing4. Intumescents

FIRE PROTECTION


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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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1. Sprays Coating

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3. Lined Steel Sheet Casings

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4. Intumescents

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4. Intumescents

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4. Intumescents

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4. Intumescents

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4. Intumescents

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4. Intumescents

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4. Intumescents


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THANK YOU

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