Material Safety Data Sheet
TJI Joist
Weyerhaeuser Company Emergency Phone: (02) 4964-0888
21 Martin Drive Fax: (02) 4964-0891
Tomago NSW 2322
Statement of Hazardous Nature: In its intact state this product is not classified as a hazardous substance according
to the criteria of Worksafe Australia.
Wood dust that may be generated by sawing or otherwise processing this product is classified as a hazardous
substance according to the criteria of Worksafe Australia.
Important Notice: This Material Safety Data Sheet (MSDS) is issued by Trus Joist, A Weyerhaeuser Business, in
accordance with Worksafe Australia guidelines. As such, the information contained within this document must not be
altered, deleted or added to. Trus Joist will issue an updated MSDS when there is a change in product specifications
and/or Worksafe regulations or guidelines. Trus Joist will not accept any responsibility for any changes made to its
MSDS in content by any other person or organization.
1. Product Identification
TJI庐 Joist
Product Name
Other Synonyms 鈥淚-beam鈥?,鈥淚-joist鈥?
TJI庐/70,, TJI庐/90
Manufacturer鈥檚 Product code
UN Number None allocated
Dangerous Goods Class None allocated
Subsidiary Risk None allocated
Hazchem Code None allocated
Poisons Schedule None allocated
TJI庐-joists are predominantly used in floor and roof systems of
Major Recommended Use
residential construction
Physical Description/ Properties:
Appearance Wood flange and plywood web material is bonded together using
an adhesive to create a wooden I-joist. Once the manufacturing
process is complete, adhesives used to manufacture the plywood
(Phenol-formaldehyde) and the I-joist (MDI) are fully cured. No
detectable levels of isocyanate or formaldehyde are present in the
product as purchased.
TJI庐 joists have no distinctive odour. When sawn, TJI庐 joists may
Odour
have the odour of the wood species used in the raw materials.
Boiling Point (oC) Not applicable
Melting Point (oC) Not applicable
Vapour Pressure Not applicable
Flash Point Not applicable
Flammability limits in Air Not flammable under normal conditions of use. See 鈥淔ire and
Explosion Hazard鈥? section
Specific Gravity (water =1) Variable; depends on wood species and moisture
pH (1% aqueous solution) Not Applicable
Variable; typically 204鈥?260o C
Auto Ignition Temperature
Ingredients:
Substance/Chemical CAS No. Proportion by weight
Wood None 90-99
Resin Solids: Phenol 9016-87-9 1鈥?9
1
formaldehyde
EPI - Emulsion polymer None <2
isocyanate (MDI) adhesive2
1 This product contains less than 0.05% free formaldehyde when manufactured.
2 This ingredient contains synthetic rubber emulsion and isocyanate. During the manufacturing process, the raw material is
converted to urea and a urethane polymer. No detectable levels of isocyanate (MDI) are present in the product as purchased.
Weyerhaeuser MSDS WC349-00
Page 1 of 3 Rev. 1/26/04
Trus Joist Reorder # 5016
2. Health Hazard Information
Health Effects
TJI庐 joists in their manufactured form are not classified as hazardous. The primary health hazard posed by these
products is thought to be due to exposure to wood dust created by sawing or otherwise machining the product.
Handling TJI庐 joists may result in splinters. See 鈥淧recautions for Use鈥? section for methods to mitigate health effects.
The following health effects are based on current research and knowledge of wood dust created from non-treated
wood fiber
Acute Health Effects
Swallowed: Swallowing wood dust may result in abdominal discomfort
Eye: Wood dust may be irritating to the eyes causing discomfort and redness
Skin: Wood dust may irritate skin. Allergic contact dermatitis may occur
Inhaled: Wood dust may irritate the throat and lungs. Asthma may occur
Chronic Effects:
Repeated inhalation of elevated levels of wood dust, depending on the species, may cause allergic contact dermatitis
and respiratory sensitization. Prolonged exposure to wood dust has been reported by some observers to be
associated with nasal cancer. However, if the work practices noted in this MSDS are followed, and exposure to
airborne dusts is kept low, no acute or chronic health effects are anticipated.
Wood dust is classified as a Group 1 carcinogen by IARC. Group 1 carcinogens are carcinogenic to humans, or there
is sufficient evidence of carcinogenicity. This classification is primarily based on studies showing an association
between occupational exposure to wood dust and adenocarcinoma of the nasal cavities and paranasal sinuses. IARC
did not find sufficient evidence of an association between occupational exposure to wood dust and cancers of the
oropharynx, hypopharynx, lung, lymphatic and hematopoietic systems, stomach, colon, or rectum.
First Aid
Ingested Not applicable under normal use.
Eye contact Wood dust may cause mechanical irritation. Treat dust in eye as foreign object. Flush with
water to remove dust particles. Get medical help if irritation persists.
Skin contact In sensitized individuals, wood dust of certain species can elicit allergic contact dermatitis,
as well as mechanical irritation resulting in erythema and hives. Get medical help if rash,
irritation, or dermatitis persists.
Inhaled Wood dust may cause unpleasant obstruction in the nasal passages, resulting in dryness of
nose, dry cough, sneezing, or headaches. Remove to fresh air. Get medical help if
persistent irritation, severe coughing, or breathing difficulty occurs.
Advice to Doctor Treat symptomatically
3. Precautions For Use
鈥?
Exposure Standard 5 mg/m3 time weighted average (TWA) measured as inspirable particulate
鈥? 鈥?
Wood Dust 10 mg/m3 short term exposure limit (STEL)
鈥?
(softwood) sensitizing to skin and respiratory tract
All work with TJI庐 joists must be carried out in such a way as to minimize exposure to wood
Engineering controls
dust. Under factory conditions, sawing, drilling, or sanding of TJI庐 joists should be done with
equipment fitted with local exhaust ventilation devices capable of removing dust at the
source. Measures should be taken to eliminate the build up of static electricity
Avoid breathing sawdust from TJI庐 joists. Wear a P1 or P2 respirator suitable for particulate
Respiratory Protection
and conforming with Australian Standards AS/NZS 1715 and AS/NZS 1716 when exposed
to dust. These standards should be followed in the selection, fit testing, use, and storage
and maintenance of the respirators.
Skin Protection Wear Industrial gloves (AS 2161), comfortable clothing and boots. Long-sleeved shirts and
long trousers are recommended to prevent skin irritation.
Eye Protection Non-fogging goggles or safety glasses (AS/NZS 1337) should be worn if there is a risk of
wood dust getting into eyes.
Flammability Not flammable under normal conditions of use, but is combustible and will sustain a fire.
Weyerhaeuser MSDS WC349-00
Page 2 of 3 Rev. 1/26/04
Trus Joist Reorder # 5016
4. Safe Handling Information
鈥?
Precautions to Be No special handling precautions are required for products in purchased form. Avoid
Taken in Handling and repeated or prolonged breathing of wood dust.
鈥?
Storage: The phenol formaldehyde adhesive used to manufacture plywood may release very
small quantities of formaldehyde in gaseous form. Under foreseeable conditions of
use, these products release less than 0.050 ppm in standard large chamber test
conditions.
鈥? MDI adhesive releases no formaldehyde. Store in well-ventilated, cool, dry place
away from open flame.
鈥?
Spills and Disposal If disposed of or discarded in its purchased form, incineration is preferable. Dry land
disposal is acceptable alternate means of disposal. It is, however, the user鈥檚
responsibility to follow applicable regulations.
鈥?
庐
Wood dust generated from machining TJI joists may be vacuumed or shoveled for
recovery or disposal. Avoid dusty conditions and provide good ventilation. Use
NIOSH-approved respirator and goggles where ventilation is not possible and the
allowable exposure limits may be exceeded.
Fire and Explosion Hazard:
14
Ignitability Index
7
Spread of Flame Index
7
Heat Evolved Index
庐
3 - Burning or smoldering TJI joists can generate carbon dioxide and other pyrolisis
Smoke Developed
products typical of burning wood. Depending on moisture content and more importantly,
index
particle diameter, wood dust may explode in the presence of an ignition source. An
airborne dust concentration of 40 g/m3 (40,000 mg/m3) is often used as the LEL for wood
dusts. Use water or dry chemical fire extinguishers or sand to extinguish fires
Smoking should be restricted in storage and work areas
Smoking
5. Contact Information
Trus Joist 鈥? A Weyerhaeuser business
Mailing address: 21 Martin Drive, Tomago NSW 2322
Phone: (02) 4964-0888
Fax: (02) 4964-0891
6. Additional Information
Date Prepared: 11/13/01
Date Revised: 1/26/04
Prepared By: Corporate Environment Health and Safety
User鈥檚 Responsibility: The information contained in this Material Safety Data Sheet is based on the experience of
occupational health and safety professionals and comes from sources believed to be accurate or otherwise
technically correct. It is the user鈥檚 responsibility to determine whether this information is suitable for their applications
and to follow safety precautions as necessary. The user has the responsibility to make sure that this sheet is the most
up-to-date issue.
Definition of Acronyms:
CAS# Chemical Abstracts Service Registry Number
IARC International Agency for Research on Cancer
NIOSH National Institute for Occupational Safety and Health
OSHA Occupational Safety and Health Administration
PEL Permissible Exposure Limit
STEL Short-Term Exposure Limit (15 minutes)
TLV Threshold Limit Value
TWA Time-Weighted Average (8 hours)
Weyerhaeuser MSDS WC349-00
Page 3 of 3 Rev. 1/26/04
Trus Joist Reorder # 5016
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