1.18
FIRE PROOFING
1.18.1 Scope of Work
Spray-on fireproofing shall
be applied to the structural
steel members not encased
in concrete.
1.18.2 General Requirements
All structural steel members protected by spray-on fireproofing material shall have a minimum of 2 hours fire resistance.
The fireproofing material, its application and
finished system shall be to the
satisfaction of SCI and
in
accordance to the
current standards set by the local
Authorities.
The material shall have the approval of the local Authorities for its use in Singapore.
The
Contractor shall
submit documented evidence of the local
Authorities'
approval immediately subsequent to award of
the
Contract.
The thickness of the fireproofing shall be in accordance with the manufacturer's written instructions, satisfying the relevant BS 476 and requirements of the local
Authorities.
Spray-on fireproofing shall not erode, delaminate, flake or dust.
The totally exposed members will be subject to the worst weather, heavy rain and strong wind.
The Contractor shall ensure that fireproofing at these
areas will not be damaged and its integrity will
not be adversely affected under
these conditions.
1.18.3 Manufacturer's Literature
The Contractor shall
submit the following:
(a) Alternative
equivalent
manufacturer's trade
name,
if applicable. 3 samples
of proposed product and 6
copies of applicable technical and installation data. Data
submitted shall include
chemical and physical descriptions of spray-on
fireproofing system, substantiated
in
writing by an Independent Testing Agency(ITA) and approved by SCI.
(b) Test data from the
approved ITA
to
verify that the spray-on
fireproofing
system
meets Underwriters' Laboratories Inc
(UL) ratings (or other approved
fire rating method), performance and contains no asbestos or free crystalline silica, and that
after
sealer is applied there is no flaking, dusting,
delamination or erosion.
1.18.4 Warranty
The Contractor shall submit warranty from the manufacturers of the materials that
the
spray-on fireproofing will not flake, dust, delaminate or erode.
The Contractor
shall also submit warranty of the proposed system by the manufacturers of all other materials used in the system.
1.18.5 Codes and Standards
All spray-on fireproofing shall comply with the applicable requirements of the local Authorities and the
requirements of the UL.
In case of any discrepancies, the more stringent requirements shall
prevail.
Spray-on fireproofing systems
shall be tested in
accordance with the
following
Standards:
Fire Tests - ASTM E-1 19, UL 263, or BS 476 :
Part 8
Salt Spray Testing - ASTM B-1 17
Deflection - ASTM E-759/80
Bond Impact - ASTM E-760/80
Cohesion/Adhesion
- ASTM E-736/80
Compressive Strength-
ASTM E-761/80
1.18.6 Mock-Up and Samples
The mock-up, if approved, shall form part of the
Works and left in an environment
similar to that at
the
actual location.
The Contractor shall
submit within 2 weeks after the award of the Contract, samples
and manufacturer's technical
and installation data to SCI
for approval.
Tests on mock-up shall include cohesion/adhesion, thickness, bond impact and
other tests as directed by SCI.
Within 7 days of the
completion of the
tests
on the mock-up, the
Contractor shall
submit a full report on the mock-up for the approval of SCI.
The report shall include
but not limited to the following:
(a) Detail
Results of
Tests
(b) Application Procedure
If in the opinion of SCI, the tests on the
mock-up fail to comply with the Contract Specification, the Contractor shall submit a new proposal for the testing of additional mock-ups,
for the approval
of SCI. All costs and expenses incurred in the
construction and
testing of the
additional mock-ups shall be borne solely by the
Contractor
and no extension of time will
be granted.
If the tests on the mock-up are accepted by SCI, the Contractor will
be given approval to proceed with the application of spray-on fireproofing to the rest of the work in similar manner to
the mock-up
and in compliance with
the Contract
Specification.
1.18.7 Thickness of Fireproofing
The Contractor will provide a thickness schedule for approval, of all the members within 2 weeks after the award of the Contract for approval by
SCI.
The proposed thickness shall be supported by approved test
reports, which verify that it
will provide the specified fire resistance.
1.18.8 Materials
Fireproofing Materials
Monokote MK6 or approved equivalent is to be spray
applied to all the structural members not encased in concrete and under internal environment only.
Fendolite or
approved equivalent is to be spray applied to all other structural steel
members not mentioned in the above paragraph.
Material containing asbestos or
mineral wool
shall not be permitted.
Spray-on fireproofing shall not erode, delaminate, flake or dust when subjected to an
air
velocity of at least 5.28 m/s for 24 hours.
Use sealer to prevent erosion, flaking
and dusting. The Contractor shall submit test data and application procedures of
spray-on fireproofing and sealer.
1.18.9 Adhesive
Adhesive, if required by manufacturer, shall consist of a latex-type emulsion which, after setting, is unaffected by
moisture or ageing, and
shall be furnished by the manufacturer of the spray-on fireproofing system.
1.18.10 Sealer
Sealer, to prevent erosion, flaking or dusting of spray-on fireproofing shall
be applied to spray-on fireproofing in accordance
with the
manufacturer’s instructions. Sealer material shall be as
furnished by
the manufacturer of the spray-on
fireproofing system,
and tested as part of the required fire rating assembly.
1.18.11 Storage and Handling
Material shall be delivered in original unopened packages. Material shall be stored
above ground level, under cover and in a dry location, until ready for use.
All bags that have been exposed to water before use or have overrun the expiry
dates shall be rejected and removed from
the
Site.
1.18.12 Workmanship
General
All the work in the section shall be carried out strictly in accordance with the manufacturer's written instructions and the approved Quality Manual.
Detailed Instructions
The Contractor shall obtain from the manufacturer, detailed printed instructions for the proper mixing, application, and/or installation of the manufacturer's products. The Contractor shall
furnish a certificate that the materials have been installed in accordance with the manufacturer's printed instructions and field directions.
Refer to Clause 3.5 on "Application"
of the Contract Specification hereinafter.
Surface Preparation
Bare steel surfaces to receive the spray-on fireproofing, shall be clean and free of
dirt, grease, oil, loose plaster, loose rust scale, loose paint, or other conditions,
which would prevent good adhesion.
All surfaces to receive spray-on
fireproofing, which do not comply with the preceding
paragraph, shall be cleaned and all coating or foreign substances, which would
The Contractor shall not start application until all surfaces and conditions have been
examined and prepared by
the
Contractor and are satisfactory
to him to receive the
spray-on fireproofing system.
Where the surface is painted for corrosion protection, the Contractor shall ensure that the
fireproofing material is compatible with and adhere to the
paint coating.
The
Contractor shall conduct
tests all at his own cost to demonstrate the compatibility
and adherence of the fireproofing to the paint work.
1.18.13 Application
The Contractor shall comply with manufacturer's printed instructions
for
the type of material and condition of substrate in each case and
to consult with manufacturer's
technical representative at the Site to determine proper procedure for conditions not fully covered by printed instructions.
Type of spray
equipment used shall be recommended by the fireproofing manufacturer.
Install thickness markers before spraying.
Extend material
full thickness over entire substrate to be covered in a monolithic blanket
of uniform
texture.
Where required by the manufacturer to meet UL requirements or local Authorities
approval, tamp the surface of freshly sprayed fireproofing to provide a medium
smooth texture, of the required thickness, minimum fire protection shall be for two (2)
hours.
Apply sealer on spray-on surfaces, where specified in the preceding paragraphs, in
accordance with manufacturer's directions.
Apply spray-on fireproofing to the thickness necessary to provide
fire-resistance
rating indicated on the Drawings.
Application of material
shall
be made as follows:
(a)
Materials that has partially set shall not be
used. Do not use caked or
lumpy material. Mix each batch separately.
(b) Apply spray-on sealer to all fireproofed surfaces.
1.18.14 Fixing of Lath
The Contractor shall submit for approval by the S.O. his method statement for fixing the metal lath to the parent steel surface, where it is required for the application of the spray-on
fireproofing.
Any method of fixing that adversely affects the
properties and
strength of the steel members shall
not be approved.
1.18.15 Protection
Prior to start of work, all
adjoining finished surfaces shall be covered with a layer of
heavy polyethylene
film, which shall
remain
in place
until
work
of spray-on
fireproofing is completed.
During spraying operations, the Contractor shall provide necessary protection
to persons in the vicinity against harm and/or injury
and to protect against health hazards from exposure of the spray-on fireproofing.
Spraying operations and protection shall conform to the following and to the current requirements of the local Authorities:-
(a) Before the start of spraying operations, all
floor areas shall
be swept broom
clean. Before the application of material, the floor area
shall be cleared of all
objects, material and
equipment other than that employed in the fireproofing works. All
objects, materials, etc., shall
be covered with plastic or plastic-
coated tarpaulin
sheets in a manner that precludes
the subsequent dispersal
of
spray-on particles.
(b) The area of the floor to be fireproofed shall be enclosed with plastic or
plastic-coated tarpaulins in a manner, which shall preclude the escape
of material from
the
enclosure.
(c) Wet material which has fallen to the
floor shall be immediately swept up and
placed in a container having walls bottom and tight cover strong enough
to resist tearing or breaking under normal handling conditions and clearly
marked as containing spray-on waste.
(d) The contents of the aforementioned containers shall not be transferred to
another container, but the containers
shall be placed directly
upon a vehicle
for disposal off the Site.
(e) All floors shall be vacuumed shortly after drying.
The vacuum cleaner shall contain a strong, single-service
disposable inner bag of durable material,
which shall be removed from the vacuum cleaner and tightly sealed. The
bag shall then be placed
in
a container of an approved type for removal and disposal.
(f) The materials used to form the enclosure shall be thoroughly vacuumed upon
completion of the
application of the
fireproofing in
the
area. The
entire floor area, all ledges
and
surfaces including tarpaulins upon which waste materials may have fallen, shall then be vacuumed or re-vacuumed before
removal of the enclosures.
(g) Enclosures
shall not be
dismantled
until the area
has
been thoroughly vacuumed after
completion of spraying and clean-up.
(h) All areas used for opening bags containing waste material and/or charging
of hoppers shall
be
enclosed
in such a manner
that material shall
not
be
permitted to escape from the immediate area in which such activity takes
place. Upon completion
of
spraying operation, the Contractor shall protect all fireproofing from damage by subsequent building construction operations
and effects of weather.
Protection methods shall be as recommended by the
manufacturer of the approved spray-on fireproofing system.
1.18.16 Patching and Cleaning
Do all patching, cutting and repairing of damaged or unsatisfactory
spray-on fireproofing materials or improper application of spray-on fireproofing as directed by SCI.
Immediately after completion of work in such room or space, clean the adjoining
surfaces of over-spray material and fall-out from the spraying operation. Daily
sweep working area; place waste materials in suitable containers
and remove from
the
Site.
Upon completion of fireproofing, remove all equipment and clean all deposits
from
areas, which do not require fire protection. Place all waste in suitable containers and remove from Site.
1.18.17 General
The Contractor shall submit for approval
by SCI a Quality Manual containing Quality
Assurance/Quality Control (QA/QC) programme for the proposed work not more
than
2 weeks after
the
award of the Contract.
The Quality Manual shall include but
not limited to the following:-
(1) Organisation Charts and responsibilities
(2) Inspection procedures and frequencies
(3) Testing procedures
(4) Records and documentation of results
(5) Test equipment
1.18.18 Tests
Unless directed otherwise, the following tests shall be carried out in accordance with
the
ASTM on the fireproofing applied on the Works to ensure its compliance with the Contract Specification
(1) Deflection to ASTM E759/80
(2) Bond Impact to ASTM E760/80
(3) Cohesion/adhesion to ASTM E736/80
(4) Density
(5) Thickness
1.18.19 Frequency of Tests
The frequencies at which testing is to be carried out shall be as follows:- (1) Deflection as instructed by SCI.
(2) Bond impact
as instructed by SCI.
(3) Cohesion/adhesion one test location to be selected at
a frequency of one per
10-metre length of the structural
steel
members.
(4) Density to be at
the
same frequency as cohesion / adhesion test.
(5) Tests on the thickness of
the
fireproofing sprayed on the trusses shall be at
a frequency of one per 5 metres length of the structural steel member.
A total of
nine readings shall be taken
at two positions
300mm apart
and
the average of
the
eighteen readings shall
be determined.
No individual thickness shall be more than 3 mm less than that specified in the design.
The average thickness recorded for each test location shall not be less than that
required to achieve the specified fire resistance.
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