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National Evaluation Service, Inc,,
<br />
<br />BOCA Evaluation Services, Inc.
<br />
<br /> SECRETARIAT
<br />ICAO Evaluation Service, Inc.
<br />
<br /> SBCCt-Public Safety
<br />Testing and Evaluetion Services, Ina.
<br />
<br /> 4051 West FlosSmoor Road
<br />Country Club Hills, IllinOiS 60478-5795
<br />(708) 799-2305
<br />
<br />5360 Workman Mill Road
<br />Whittier, California 90601-2.299
<br />(310) 699-0543
<br />
<br /> NATIONAL EVALUATION REPORT
<br /> Copyright ¢¢ 1993. National Evalu?~ee Service, Ina,,,
<br />TIMBERSTHAND~* LAMINATED STRAND LUMBER (LSL)
<br />THUS JOIST MACMILLAN
<br />A Limited Padnership
<br />POST OFFICE BOX 60
<br />BOISE, IDAHO 83707
<br /> h SUBJECT: TimberStrsndTM Laminated Strand Lumber (LSL).
<br /> g. PROPERTY FOR WHICH EVALUATION IS SOUGHT: Structura~ Per-
<br />formance,
<br /> Ill. DESCRIPTION; A, General: TimberStrand Lamina'ted Strand Lum-
<br />ber (LSL) is manufactured from strands of aspen blended with an isocya-
<br />nato-based adhesive complying with tho requirements no,ed in the "Tim-
<br />berStrand Laminated Strand Lumber Manufacturing Standard," The
<br />straods are oriented in a parallel direction add ~ormed into a lsrge mat, 8
<br />feet wide by 35 feet 10nB, of various thicknesses. The mats are pressed
<br />to the desired thickness using a steam [niection press. TimberStrand LSL
<br />members are available in thicknesses up to 5V2 inches, depths to 48
<br />ioches and lennhs~sp to 3~ feet.
<br /> B. Design and Allowable Stresses: Design provisions for solid-sawn
<br />dimension lumber are applicable to TimbsrStrand LSL unless otherwise
<br />noted in this report.
<br /> Allowable unit stresses for dry conditions of use ars noted in Table No,
<br />I for TimberStrand LSL.
<br /> Where members qualify as repetative members as defined in the appli-
<br />cable code, an increase in allowable stresses related to bending of 4 per-
<br />cent, is permitted.
<br /> Design values for through bolts, l/s-inch-diameter lag bolts and nails
<br />are stated in Table No, I, Three-eighths- and e/e-inch-diameter lag bolts
<br />are permitted to be used, provided the design procedures are in actor~
<br />dance with fha applicable code for wood having a specific gravity of 0.50.
<br />Nail spacing is limded, as noted in Footnote 4 of Table NO. I,
<br /> Him Joisl: Use of TimberStrand LSL Rim board shall be in accordance
<br />with the rim joist applications noted in Table No, II.
<br />iV, INSTALLATION: Application shall comply with this report and the
<br />applicable code.
<br />
<br /> V. IDENTIFICATION: Timbergtrand LSL strucfuraJ framing lumber is
<br />identified with a stamp noting the name and plant number ct the manufac-
<br />turer, the product trade name, the grade, the NES evaluation report num-
<br />ber, nod the name and logo of the q uslity control agency, PFS Corporation
<br />(NER-QA251), Additionally, Ihs rim joist is identified by "TimberStrand
<br />LSL Rim board" printed on the malarial
<br />
<br /> VI EVIDENCE SUBMITTED: 1, PSL 300TM Technical Manual--Test Data
<br />
<br />'TimberStrend is a trademark of True JoisI MacMillan, A Limited Padnershie,
<br />
<br /> 900 Montnalr Road, Suite A
<br /> Birmingham, AIeOama 35213.1206
<br /> (205) 591-t 853
<br />
<br /> Report No. NER-481
<br /> Issued September 1, 1993
<br /> THIS REPORT IS SUSJECT TO
<br /> RE-EXAMiNATION IN ONE YEAR
<br />
<br />and Correlations, under the cover of a letter, dated January 20, 1993, pre-
<br />pared by Joseph R, Pissione, P.E., representing 7rue Joist MacMillan.
<br /> 2. Analysis of Laminated Strand Lumber (2 by 4 to 2 by 8 sizes) test
<br />data summaries, report by Paula Pintar, E,I.T., addressing edge bending,
<br />tension and MOE; paper by Stanley Suddsrth providing background
<br />i0formation on nsil test res0its; PSL 300 Laminated Strand Lumber
<br />Manufacturing Standard; and descriptive details under the cover of a let-
<br />ter, dated April 15, 1992, prepared by Joseph R, Pisciooe, RE,, represent-
<br />ing True Joist MacMillan,
<br /> 3, Summary Report "Evaluation of the Creep Performance ct Timber'-
<br />Strand LSL," dated January 20, 1993, prepared by Joseph R. Pisoione,
<br />P,E,, representing Trus Joist MacMillan.
<br /> 4, Summary of testing (edge bending, tension and depth effect) con-
<br />ducted on various sizes and densities (38 pot and 44 pcf) of laminated
<br />strand lumber and analysis of data, under cover of a letter, dated January
<br />21, 1993, prepared by Joseph R. Piscione, P.E., representing Tros Jo~st
<br />MacMillan.
<br /> 5, Product quality modebng report, Pr0iect No. JT-150--Repon NO. t,
<br />dated September 23, 1992, prepared by D, Barnes, representing MacMil-
<br />lan Bloedel Research,
<br /> 6. Results of fastener tests conducted on Aspen HmberStrand LSL,
<br />dated March 11, 1993, witnessed by Graham McFarland, representing the
<br />PFS Corporation.
<br /> 7. Results of adhesive tests (FPLE 437) "TJM TimberStrand Manufac-
<br />tured with MBI binder," dated March 1,1993, prepared by Steve KJrJncic,
<br />P,E., research officer, Alberta Research Council.
<br /> 8, TimberStrand Laminated Strand Lumber Manufacturing Standsrd-
<br />Deerwood plant, dated May, 1993 (Draft 5), prepared by True Joist Mac-
<br />Millan.
<br /> 9. Additional results of Phase II testing, bolts and nail testing and creep
<br />test results "Aspen TimberStrand LSL Structural Qualification Test PrO-
<br />gram~Long Term Load (Creep) Performance," dated March 25, 1993,
<br />submitted under cover of a letter, dated April 13, 1993, from Joseph R
<br />Piscione, RE.
<br /> 10. Results of tests conducted on TimberStrand LSL Rim ioists sub-
<br />mitted under cover of a letteh dated May 7, 1993, from Joseph R. Pis-
<br />clone, RE,
<br /> VII. CONDITIONS OF USE: The National Evaluation Service Committee
<br />finds that Tm~berStrandTM Laminated Strand Lomber (LSL) is an aitem~
<br />tive material to that specified in the 1993 BOCA National 8uildlng Code,
<br />the 1991 Standard Building Code with 1992/1993 Revisions and the t 991
<br />Uniform Building 0ode with 1992 Supplement, Subject to the following
<br />conditions:
<br /> 1, TimbsrStrand LSL is produced at the Trus Jois~ MacMillan, Deer-
<br /> wood, Minnesota, manufacturing p~ant with quality contro~ inspe¢-
<br />
<br />Boise, fdah0 lions by PFS Corporation (NER-0A251).
<br />
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