Panel types, surfaces
& technical characteristics

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Panel types

KLH® - CLT panels are offered in 3 standard surface qualities of bare wood: non-visual, industrial visual (architectural), and domestic visual (the highest standard of surface finish). Also, special surface finishes and panel build-ups are possible, depending on the availability of the thicknesses and species of lumber boards required, as well as fabrication feasibility. Please contact us for special requests.

 

We also offer selected panels which are characterized by double surface laminations in the longitudinal direction. Additional lumber oriented in the longitudinal direction at the surfaces of the panel makes possible considerably more flexural resistance in that direction, thereby increasing the spans possible for a given loading condition. In addition, KLH® - CLT is available with a wide variety of lamination possibilities in both the longitudinal and transverse directions, allowing the design team to tailor a panel to a particular application in a way that minimizes wood fiber used. Finally, lamination build-ups may be chosen to maximize fire protection, depending on project requirements.

Maximum panellength 54'-1 ½" | width 9'-8" | thickness 1'-7 ½"
Minimum length27'-1", in increments of 2" up to the maximum panel length
Invoicing widths7'-5 ¼" | 8'- ½" | 8'- 2 ½" | 8' - 11 ½" | 9' - 8"

For the walls Surface layers in the transverse panel direction TT

Nominal thickness [in.]in Layers TypeLamella structure [in.]
  
CLCLCLC
KLH®2.363sTT0.790.790.79
KLH®2.763sTT0.791.180.79
KLH®3.153sTT1.180.791.18
KLH®3.153sTT (V2)0.791.570.79
KLH®3.543sTT1.181.181.18
KLH®3.943sTT1.181.571.18
KLH®3.943sTT (V2)1.570.791.57
KLH®4.133sTT1.381.381.38
KLH®4.333sTT1.571.181.57
KLH®4.723sTT1.571.571.57
KLH®3.945sTT0.790.790.790.790.79
KLH®4.335sTT0.790.791.180.790.79
KLH®4.725sTT1.180.790.790.791.18
KLH®4.725sTT (V2)0.791.180.791.180.79
KLH®5.125sTT1.180.791.180.791.18
KLH®5.515sTT1.180.791.570.791.18
KLH®5.515sTT (V2)0.791.570.791.570.79
KLH®5.515sTT (V3)1.570.790.790.791.57
KLH®5.915sTT1.181.181.181.181.18
KLH®5.915sTT (V2)1.570.791.180.791.57
KLH®6.305sTT1.570.791.570.791.57
KLH®6.895sTT1.381.381.381.381.38
KLH®7.095sTT1.571.181.571.181.57
KLH®7.875sTT1.571.571.571.571.57
KLH®7.097sTT1.180.791.180.791.180.791.18

For floors and roofs Surface layers in the longitudinal panel direction TL

Nominal thickness [in.]in Layers TypeLamella structure [in.]
  
LCLCLCL
KLH®2.363sTL0.790.790.79
KLH®2.763sTL0.791.180.79
KLH®3.153sTL1.180.791.18
KLH®3.153sTL (V2)0.791.570.79
KLH®3.543sTL1.181.181.18
KLH®3.943sTL1.570.791.57
KLH®3.943sTL (V2)1.181.571.18
KLH®4.133sTL1.381.381.38
KLH®4.333sTL1.571.181.57
KLH®4.723sTL1.571.571.57
KLH®3.945sTL0.790.790.790.790.79
KLH®4.335sTL0.790.791.180.790.79
KLH®4.725sTL1.180.790.790.791.18
KLH®4.725sTL (V2)0.791.180.791.180.79
KLH®5.125sTL1.180.791.180.791.18
KLH®5.125sTL (V2)0.791.181.181.180.79
KLH®5.515sTL1.570.790.790.791.57
KLH®5.515sTL (V2)0.791.570.791.570.79
KLH®5.915sTL1.570.791.180.791.57
KLH®5.915sTL (V2)1.181.181.181.181.18
KLH®5.915sTL (V3)0.791.571.181.570.79
KLH®6.305sTL1.570.791.570.791.57
KLH®6.305sTL (V2)0.791.571.571.570.79
KLH®6.695sTL1.571.181.181.181.57
KLH®6.695sTL (V2)1.181.571.181.571.18
KLH®6.895sTL1.381.381.381.381.38
KLH®7.095sTL1.571.181.571.181.57
KLH®7.095sTL (V2)1.181.571.571.571.18
KLH®7.485sTL1.571.571.181.571.57
KLH®7.875sTL1.571.571.571.571.57
KLH®6.305ssTL1.18+1.181.571.18+1.18
KLH®5.517sTL0.790.790.790.790.790.790.79
KLH®6.307sTL0.791.180.790.790.791.180.79
KLH®7.097sTL0.791.570.790.790.791.570.79
KLH®7.097sTL (V2)1.180.791.180.791.180.791.18
KLH®7.877sTL0.791.570.791.570.791.570.79
KLH®8.277sTL1.181.181.181.181.181.181.18
KLH®8.667sTL1.181.571.180.791.181.571.18
KLH®8.667sTL (V2)1.570.791.570.791.570.791.57
KLH®9.067sTL1.181.571.181.181.181.571.18
KLH®9.457sTL1.181.571.181.571.181.571.18
KLH®9.657sTL1.381.381.381.381.381.381.38
KLH®10.247sTL1.571.571.181.571.181.571.57
KLH®7.097ssTL1.18+1.180.790.790.791.18+1.18
KLH®7.877ssTL1.18+1.180.791.570.791.18+1.18
KLH®8.277ssTL1.18+1.181.181.181.181.18+1.18
KLH®8.667ssTL1.57+1.570.790.790.791.57+1.57
KLH®8.667ssTL (V2)1.18+1.181.181.571.181.18+1.18
KLH®9.067ssTL1.57+1.570.791.180.791.57+1.57
KLH®9.457ssTL1.57+1.570.791.570.791.57+1.57
KLH®9.847ssTL1.57+1.571.181.181.181.57+1.57
KLH®10.247ssTL1.57+1.571.181.571.181.57+1.57
KLH®11.027ssTL1.57+1.571.571.571.571.57+1.57
KLH®11.818ssTL1.57+1.571.181.57+1.571.181.57+1.57
KLH®12.608ssTL1.57+1.571.571.57+1.571.571.57+1.57

Surface Quality

The standard KLH® - CLT panel consists of spruce boards in three different surface qualities, which can vary between the top and bottom surfaces. This applies without restriction for all the panel types shown previously.

Surfaces treatment and special surfaces

Both the industrial visible quality and the domestic visible quality panels are fully sanded. We also offer domestic visible quality surfaces in a brushed version. Should you require UV protection, varnished elements or any other surface treatment, please contact us. The same applies to surfaces in other types of wood, which we can offer depending on customer requirements and the availability of raw materials.

Overview of the individual surfaces

 Domestic Visible (DVQ)Industrial Visible (IVQ)Non Visible (NVQ)
Application AreaVisible components without restrictions used in residential constructions.Visible components with moderate restrictions, not recommendet for residential constructions.Pure structural components with subsequent panelling.
Demand towards Surfacehigh demandmedium demandno demand
Production-Related Referenceschamfer on TL panels
(in the panel width joint)
chamfer on TL panels
(in the panel width joint)
no chamfer
Surface Finishing In-Plantfully sanded (one- or double sided) also one side brushedfully sanded (one- or double sided) equalised (planed or sanded)
Surface Treatment In-Planton request on request protective coating on request, finishing not available

Minimum requirements

THE MINIMUM REQUIREMENTS FOR EACH SURFACE DESCRIBED REFER TO THE TIME OF DELIVERY.
FOR NARROW SIDES AND CNC-TREATED SURFACES, THE CRITERIA FOR NON-VISIBLE SURFACES APPLY.

Criteria Domestic visible (DVQ) Industriel visible (IVQ) Non visible (NVQ)
 
Surface treatmentsandedsanded, individual small rough areas permittedequalised (planed or sanded)
Type of woodone type of wood one type of wood;
spruce / fir (≤ 10 %)
are regarded as one
type of wood
addition of other types of wood possible
Colour and texture mostly balanced generally balanced no requirements
Blue and brown stains, red tingeslight discolouration
permissible (≤ 3 %)
slight discolouration
permissible (≤ 5 %)
no restrictions
Branches, tightly intergrownpermissiblepermissibleno restrictions
Knots, blackpermissible ≤ 1'' Ø permissible ≤ 1.5'' Øno restrictions
Loose knots, knot holespermissible ≤ 0.5'' Ø permissible ≤ 0.5'' Øno restrictions
Resin pocketssporadically permissible
≤ 0.1'' x 2''
sporadically permissible
≤ 0.2'' x 3''
no restrictions
Pithssporadically permissible
length ≤ 2.5'
sporadically permissible
length ≤ 3.5'
no restrictions
Bark ingrowthimpermissible impermissible no restrictions
Waneimpermissible impermissible permissible
Compression wood sporadically permissible sporadically permissible no restrictions
Cut burrows from inactive
insect infestation
impermissible impermissible sporadically permissible
Wood moisture during production≤ 12 % ≤ 12 %≤ 14 %
Cracks and joints
(at a reference moisture measurement of 12 %)
sporadically permissible
≤ 0.05''
sporadically permissible
≤ 0.1''
sporadically permissible
≤ 0.25''
Surface defectssporadically permissible
≤ 0.5'' Ø
sporadically permissible
≤ 0.6'' Ø
no restrictions
Surface re-treatment
(Filling and plugging of branch holes, strips, etc.)
permissiblepermissible no restrictions
Defects on cutting edgessporadic small
defects permissible
sporadic defects
permissible
no restrictions
Cutting edge re-treatment
manually, using sand paper
yesyesno
Chamfer on DL panelsyesyesno
Range of validityThe given surface qualities valid:
- at the time of delivery
- only for the covering layer, not for the narrow sides
- for one-sided visible surfaces
- for narrow sides and CNC-treated surfaces, the criteria for NVQ surface quality apply
- for double-sided visible surfaces, a small amount of on-site reworking is to be expected
Crack formationLike all solid wood products, the above stated qualities are subject to crack and joint formation as a result of drying to their future compensation moisture balance when installed due to the product characteristics. This cannot be prevented.
NoteWood is a natural product. Minor deviations from the table values are natural and are no reason for complaint.

 

Technical
characteristics

 

Technical characteristics

PRODUCT NAME / BrandKLH® - CLT
PRODUCTSolid wood panels with crosswide glued laminations
APPLICATIONStructural elements for walls, floors and roofs
WOOD SPECIESAustrian spruce (other wood types on request)
PANEL BUILD UP3, 5, 7 or more layers depending on static requirements
LAMINATIONSThickness 0.79″ - 1.57″, technically dried, quality-sorted and finger-jointed
PANEL GRADECV3M1
ADHESIVEFormaldehyde-free PUR adhesive
LAMINATION PRESSURE12,500 psf, minimum
WOOD MOISTURE CONTENT12% (+/- 2%) at delivery
MAXIMUM ELEMENT DIMENSIONSLength 54´-2˝ | width 9´-8˝ | thickness 1´-8˝
INVOICING WIDTHS7'-5¼″ | 8'-½″ | 8'-2½″ | 8'-11 ½″ | 9'-8″
SURFACE QUALITYNon-visual quality (NVQ) | Industrial visual quality (IVQ) | Domestic visual quality (DVQ)
Special surfaces on request
WEIGHTFor structural calculations, 35 pcf
Shipping weight, 31 pcf
DIMENSIONAL CHANGE WITH MOISTURE CONTENTIn-plane: 0.02% per 1% change in wood moisture content
Out-of-plane: 0.24% per 1% change in wood moisture content
NOMINAL CHAR RATE1.5 in./hr.
EFFECTIVE CHAR DEPTH1.9 in. after 1 hour
All lamination thicknesses = 1-3/8˝
FIRE DESIGNAccording to NDS 2015 and CLT Handbook, US Ed.
FLAME SPREAD INDEXClassification B
CERTIFICATIONANSI/APA PRG 320-2018

 

Technical Approvals, Certificates and Eco-labels

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At your service.

(971) 804-3794
Sebastian.Popp@klhusa.com

KLH US Holding Corp.
c/o Ernst & Linder
30 Wall Street, 8th Floor
New York, NY 10005-2205

We provide thoughtful design solutions that are structurally and material efficient as well as ecologically appropriate, focusing on a healthy world for future generations.

Sergey David | Technician

I love the beautiful and elegant design solutions that are possible with mass timber. CLT is structurally efficient and naturally fire resistant, and is often the best choice for demanding construction schedules and challenging project sites.

Howard Thurston | Head of Engineering

Our team continually strives to provide the very best quality product, supported by a professional and personalized process. We feel integrity is critical to a successful project and a beautiful end result.

Michael Hahn | Design Director

You have the vision. We have the knowledge and material to make it a sustainable mass timber reality.

Sebastian Popp | Technical Director

We are there
for you.