CROSS-LAMINATED TIMBER (CLT)
1.
2.
DESIGN AND FABRICATION OF CLT PANELS SHALL BE IN ACCORDANCE WITH ANSI/APA PRG 320 {2019}
“STANDARD FOR PERFORMANCE-RATED CROSS-LAMINATED TIMBER” AND {2018} NDS “NATIONAL DESIGN
SPECIFICATION FOR WOOD CONSTRUCTION”.
CLT PANELS SHALL CONFORM TO THE FOLLOWING REQUIREMENTS:
a. MANUFACTURER: SMARTLAM
b. GRADE: PER CLT ALLOWABLE STRESS REFERENCE DESIGN VALUES TABLES BELOW
c. APPEARANCE: {INDUSTRIAL/ARCHITECTURAL} PER ANSI/APA PRG 320 {2019}
d. LAMINATING STOCK: PER CLT PROPERTIES TABLE BELOW
e. MOISTURE CONTENT: 12% +/- 3% AT TIME OF MANUFACTURING
f. ADHESIVE: COMPLY WITH ANSI/APA PRG 320 {2019} AND ANSI A190.1 {2017}
NOTE TO SPECIFIER: EDIT TABLE ACCORDINGLY TO FIT PROJECT REQUIREMENTS.
ALLOWABLE STRESS REFERENCE DESIGN VALUES ARE FOUND IN APA PR-L319. CURRENT
TABLE SHOWS V5M2 GRADE.
CLT PANEL- MINIMUM ALLOWABLE STRESS REFERENCE DESIGN VALUES TABLE:(1)
PANEL APPLICATION
LAYUP
GRADE
Species
MAJOR STRENGTH DIRECTION
SG
MINOR STRENGTH DIRECTION
(FbS)eff,f,0
(EI)eff,f,0
(GA)eff,f,0
Vs,0
(FbS)eff,f,90(l
(EI)eff,f,90(1
(GA)eff,f,90(
Vs,90
(lb-ft/ft)
(106 lbin2/ft)
(106 lb/ft)
(lb/ft)
b-ft/ft)
06 lbin2/ft)
106 lb/ft)
(lb/ft)
FLOOR
5-PLY
V5M2
0.42
7500
415
1.2
2750
3825
108
1.2
1650
PANEL
(6.875”)
Hem-Fir (2)
ROOF
3-PLY
V5M2
0.42
3250
108
0.6
1650
440
4.2
0.6
550
PANEL
(4.125”)
Hem-Fir (2)
WALL
5-PLY
V5M2
0.42
7500
415
1.2
2750
3825
108
1.2
1650
PANEL
(6.875”)
Hem-Fir (2)
Notes:
(1) CLT panels shall be oriented with outer layer spanning perpendicular to supports unless noted otherwise.
(2) The outermost laminations shall be permitted to be replaced by Douglas Fir-Larch lumber with design properties equal to or greater than that
of the laminations specified for the layup.
3.
SUBMIT SHOP DRAWINGS AND PLACEMENT DRAWINGS FOR REVIEW BY THE ARCHITECT AND ENGINEER
WITH THE FOLLOWING INFORMATION. WHERE REQUESTED, DRAWINGS SHALL BE SIGNED AND SEALED BY
A QUALIFIED PROFESSIONAL ENGINEER, EXPERIENCED IN THE DESIGN OF THIS WORK AND LICENSED IN
STATE WHERE PROJECT IS LOCATED.
a. SHOP DRAWINGS:
i. PANEL LAYOUT, DIMENSIONS OF FLOORS, ROOFS, AND WALLS.
ii. IDENTIFY PANEL MAJOR STRENGTH DIRECTION.
iii. IDENTIFY SPECIES AND STRESS GRADE OF PANELS.
iv. IDENTIFY APPEARANCE AND APPLICABLE SIDE (ARCHITECTURAL vs INDUSTRIAL) AS WELL
AS SHOP-APPLIED FINISHES.
v. IDENTIFY CONNECTION DETAILS, SHOP-CUT OPENINGS, FASTENERS, AND CONNECTION
HARDWARE.
vi. IDENTIFY RELATIONSHIP OF CLT PANELS TO ADJACENT MATERIAL.
vii. INCLUDE AND LOCATE OPENINGS 12 INCHES OR GREATER.
b. PLACEMENT DRAWINGS:
i. INDICATE PANEL NUMBER, LOCATION AND ERECTION SEQUENCE WITH SAME MARK AS
SHOP DRAWING.
ii. INDICATE LIFTING LOCATIONS AND RECOMMENDATIONS (IF APPLICABLE).
iii. INDICATE PANEL ELEVATION (if applicable).
iv. INDICATE SPECIAL INSTRUCTION (I.E. FIELD TRIM OR FIT).
v. LABEL CONNECTION DETAILS.
vi. INDICATE LOCATIONS, TOLERANCES, AND DETAILS OF ANCHORAGE TO SUPPORTING
STRUCTURE.
vii. WHERE APPLICABLE, PROVIDE THREE DIMENSIONAL MODELS OF BUILDING IDENTIFYING
CLT PANEL CONSTRUCTION
c. SUBMIT FINAL PLACEMENT DRAWINGS FOR REVIEW BY THE INSTALLER AND GENERAL
CONTRACTOR.
4. WHERE REQUESTED, SUBMIT PANEL CALCULATIONS AND CONNECTION DESIGN CALCULATIONS THAT
COMPLY WITH THE PERFORMANCE REQUIREMENTS OUTLINED IN THE THESE DOCUMENTS. CALCULATIONS
SHALL BE SIGNED AND SEALED BY A QUALIFIED PROFESSIONAL ENGINEER, EXPERIENCED IN THE DESIGN OF
THIS WORK AND LICENSED IN THE STATE WHERE THE PROJECT IS LOCATED.
5. PRIOR TO FABRICATION, VERIFY SITE DIMENSION AND ELEVATIONS OF FOUNDATION AND FRAMING THAT
CLT WILL BE PLACED ON.
6. PROVIDE FASTENERS OF SIZE AND TYPE INDICATED ON THE DRAWINGS. INSTALL FASTENERS PER
MANUFACTURER'S RECOMMENDATIONS. WHERE FASTENERS ARE EXPOSED TO WEATHER OR IN CONTACT
WITH CONCRETE OR MASONRY, PROVIDE HDG PER ASTM A153 OR TYPE 304 OR 316 STAINLESS STEEL.
7. PANELS ARE INTENDED FOR “DRY SERVICE” CONDITION. IF PANEL IS EXPOSED TO WEATHER, IT IS THE
RESPONSIBILITY OF THE CONTRACTOR AND OWNER TO VERIFY PANEL IS PROPERLY WEATHER-PROTECTED.
8. DELIVERY, STORAGE AND HANDLING SHALL BE PER MANUFACTURER'S RECOMMENDATIONS. KEEP PANELS
PROTECTED FROM WEATHER DURING DELIVERY AND STORAGE AT ALL TIMES.
9. INSTALL PANELS IN ACCORDANCE WITH FINAL REVIEWED PLACEMENT PLAN DRAWINGS. PLACE PANELS
LEVEL, PLUMB AND WITH UNIFORM CLOSE-FITTING JOINTS. FIT PANELS WITHOUT TRIMMING, CUTTING OR
OTHER MODIFICATIONS UNLESS SPECIFICALLY INDICATED ON THE DRAWINGS OR APPROVED BY THE
MANUFACTURER AND ENGINEER.
10. PROVIDE TEMPORARY SHORING, BRACING AND OTHER SUPPORTS FOR INSTALLING THE PANEL. DESIGN OF
SUCH SHALL BE BY A PROFESSIONAL ENGINEER SECURED BY THE CONTRACTOR. PANELS SHALL BE SECURED
TO RESIST WIND LOAD, SEISMIC LOAD, CONSTRUCTION LOADS OR ANY OTHER LOADING THAT MAY OCCUR
DURING THE CONSTRUCTION PROCESS UNTIL THE BUILDING, AS A WHOLE, IS COMPLETE. FAILURE TO
MAKE PROPER AND ADEQUATE PROVISIONS FOR PANEL STRESS DURING THE INSTALLATION SHALL BE
SOLELY THE RESPONSIBILITY OF THE INSTALLER.