Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures

Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures by Susan LeVan Download PDF EPUB FB2

Effects of fire retardant chemicals on bending properties of wood at elevated temperatures. Res. Pap. FPL-RP Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory.

24 p. A limited number of free copies of this publication are. Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures. Madison, WI: U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, [] (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors.

The fire-retardant chemical studied consisted of high purity GUP, boric acid (B), and a minor amount of additives. The clear specimens of pine treated with FRW were either air-dried after treatment of kiln-dried at 70[degrees]C and were then subjected to various durations of a steady-state exposure at 66[degrees]C and 75 percent relative humidity.

Pressure treated wood shakes and shingles, on the other hand, have a higher degree of fire resistance. These wood shakes and shingles are impregnated with fire retardant chemicals under pressure at the factory.

Class B or C fire resistance ratings can be achieved for pressure treated wood shakes and shingles depending upon the amount of chemicals. LeVan and Winandy – FIRE RETARDANT TREATMENTS AND WOOD STRENGTH FIG.

Effect of fire retardant treatment on residual char weight of cellulose. (M ) () tested sodium borax, sodium chloride, potassium carbonate, aluminum chloride, and monoammonium phosphate. All compounds increased the residual char weight of the material (Fig.

Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures. Res. Pap. FPL–RP– Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory.

24 p. Exposed to Elevated Temperatures • ASTM D Standard Test Method for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures on Strength Properties of Fire-Retardant Treated Lumber • ASTM D Standard Practice for Calculating Bending Strength Design Adjustment Factors for Fire-Retardant-Treated Plywood Roof Sheathing.

In this study, a special grade of southern pine plywood was treated with two fire-retardant chemicals and subjected to a cyclic temperature variation from room temperature to 65°C at two targeted.

Bending Properties of Wood at Elevated Temperatures. Res. Pap. FPL, Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 4. LeVan, SL and Winandy, JE. Effects of Fire Retardant Treatments on Wood Strength: A Review. Wood and Fiber Science 22(1), 5.

Winandy, JE. Fire-Retardant-Treated. As evidenced by recent structural problems with fire-retardant-treated plywood, fire retardant chemicals and high temperature environments can degrade the strength properties of wood.

We do not know to what extent fire retardant chemicals, thermal environment, and moisture content contribute to wood degradation. We suspect that the combination of acidic fire retardant chemicals and elevated. FPL - Effects of Fire Retardants on Bending Properties of Wood Research by the U.S.

Forest Product Laboratory on the impacts of fire retardant chemicals on the bending properties of wood at elevated temperatures. 24 pages, 09/ FPL - Effect of Fire Retardants on Mechanical Properties of Plywood. BibTeX @MISC{Service90effectsof, author = {Forest Service and Susan L.

Levan and Robert J. Ross and Jerrold E. Winandy and Susan L. Ross and Robert J. Win and Jerrold E}, title = {Effects of Fire Retardant Chemicals on the Bending Properties of Wood at Elevated Temperatures}, year = {}}. LeVan and Winandy-FIRE RETARDANT TREATMENTS AND WOOD STRENGTH 1 17 TEMPERA TURE f OC.I FIG.

Effect of fire retardant treatment on residual char weight of cellulose. (M 1 3 18 15) () tested sodium borax, sodium chloride, potassium carbonate, aluminum.

Over the last 20 years, the permanent effect of extended high-temperature and cyclic exposure on wood strength has been extensively studied (LeVan et al.Winandy a, LeVan et al. temperatures of °F appeared to have a comparable effect to kiln-drying after treatment temperatures of to °F. Except for the differential effect on TAU, FR treatment and redrying had a similar effect on the two species of plywood tested.

Keywords: Fire retardants, structural plywood, bending strength, shear strength, Douglas-fir. Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures. Res. Pap. FPL–RP– Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory.

24 p. LeVan, Susan L.; Winandy, Jerrold E. Effects of fire retar-dant treatments on wood strength: A review. Wood and Fiber. _____. Standard test method for evaluating the effects of fire-retardant treatments and elevated temperatures on strength properties of fire-retardant treated lumber.

D ASTM, West Conshohocken, PA. American Wood-Preservers' Association (AWPA). Book of Standards. Standard C The results showed that: (1) There were five stages in the rising process of the internal temperature of untreated, fire-retardant solution soaked, and fire-proof paint coated wood during the fire.

Effects of Fire Retardant Chemicals on the Bending Properties of Wood at Elevated Temperatures. Res. Pap. FPL, Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products. Effects of fire-retardant chemicals on the bending properties of wood at elevated temperatures.

Research Paper USDA FPL, Madison, WI, USA,26pp. Google Scholar. Fire-retardant treatments can affect the strength of wood both at the time of processing and while the wood is in service. Initial processing effects are related to treatment and redrying conditions. Secondary effects are associated with in-service exposure of the treated wood to elevated temperatures.

Initial Processing Effects. The objective of this study was to determine the effects of some boron compounds, which have fire retardant properties, as well as melamine-urea-formaldehyde (MUF) resins having different melamine.

Effects of fire retardant retention, borate buffers, and redrying temperature after treatment on thtermal-induced degradation Winandy, Jerrold E. Journal Articles.

Effects of Fire Retardant Chemicals on the Bending Properties of Wood at Elevated Temperatures LeVan, Susan L.; Ross, Robert J.; Winandy, Jerrold E. Research Papers. Effects of fire retardant chemicals on bending properties of wood at elevated temperatures. USDA Forest Serv., Forest Products Lab.

Madison, Wisconsin. 24 pp. State of California, Dept. of General Services. Effects of Fire Retardant Chemicals on the Bending Properties of Wood at Elevated Temperatures By Forest Service, Susan L.

Levan, Robert J. Ross, Jerrold E. Lebow PK, Winandy JE () Verification of the kinetics-based model for long-term effects of fire retardants on bending strength at elevated temperatures Wood Fiber Sci 31(1) LeVan SM, Ross RJ, Winandy JE () Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures.

USDA Research Paper FPL-PR Lebow PK, Winandy JE (b) Verification of a kinetic based model for long term effects of fire retardant treatment on bending strength at elevated temperatures. Wood. PYRO-GUARD ® Interior Fire-Retardant-Treated Wood ASTM D Standard Test Method for Evaluating Effects of Fire- Retardant - Treatments and Elevated Temperatures on Strength Properties of -Retardant-Treated Fire Lumber ASTM D, Standard Practice for Calculating Bending Strength Design Adjustment Factors.

Fire-retardant-treatments are used to reduce the flame-spread characteristics of wood. Chemicals and redrying conditions employed in treatments are known to modify the strength properties of the wood product being treated. This practice gives procedures for fire-retardant chemical manufacturers to use to calculate the effects of their treatment on lumber used in normal and elevated.

Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures. Research Paper FPL-RP United States Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI. As evidenced by recent structural problems with fire-retardant-treated plywood, fire retardant chemicals and high temperature environments can degrade the strength properties of wood.

We do not know to what extent fire retardant chemicals, thermal environment, and moisture content contribute to wood degradation. This study evaluated the effects of boron impregnation and heat treatment on the chemical and mechanical properties of wood. Sugi (Cryptomeria japonica D.

Don) sapwood specimens treated with either boric acid (BA) or di-sodium octoborate tetrahydrate (DOT) solutions were exposed to heat treatments at either or °C for 2 or 4 al composition and strength properties .ASTM D - Standard Test Method for Evaluating the Effects of Fire-Retardant Treatments and Elevated Temperatures on Strength Properties of Fire-Retardant Treated Lumber.

6. ASTM D - Standard Practice for Calculating Bending Strength Design Adjustment Factors for Fire retardant Treated Plywood Roof Sheathing.

7.