HDCLT

Concealed solution for connecting CLT walls to concrete foundations.

High strength, low profile, seamlessly secure.

Designed specifically for connecting cross-laminated timber (CLT) wall panels to concrete foundations: the HDCLT tension tie provides a robust design uplift capacity of up to 18.6 kN, yet due to it’s low profile of just 140 mm, remains completely concealed within the subfloor and floor covering layers.

To help reduce installation time, the fastener configuration has been optimised for maximum performance with the most efficient screw quantity.

HDCLT includes an 8mm thick washer integrated with the tension tie seat, which provides additional strength where it is most needed. The profile design permits up to 25mm concrete-CLT panel interlayer thickness.

CE Marking
ETA
Service class 2
Indoor
Electrogalvanized steel Z275

Product Details

Images

Features

Material

Tension Tie: S 250 GD + Z 275 according to DIN EN
Washer: S235JR according to EN 10025

Corrosion Protection:

275 g/m2 galvanized on both sides 20mm
washer: ~ 55µm according to EN1461

 

Benefits

  • High-strength: up to 18.6 kN design uplift resistance

  • Low height: completely concealed within the floor structure

  • Flexible: allows up to 25mm tolerance to ensure optimal fastener edge distance where a concrete-CLT interlayer exists.

Application

Suitable For

Supporting Member:

  • CLT, Concrete, Steel, Solid Timber

Supported Member:

  • CLT, Solid wood, Engineered Timber

Technical Data

Dimensions

Product dimensions

References Dimensions [mm] Holes in flange A Holes in flange B Weight [kg]
A B C t Ø 5 Ø 18
HDCLT1401376011921610.48

Product capacities

References Characteristic capacities - Timber C24 [kN]
R1.k
CNA4.0x40 CNA4.0x50 CNA4.0x60 CSA5.0x40 CSA5.0x50
HDCLT1407.610.112.6min(22.1; 24,2/kmod)min(26.1; 24,2/kmod)
 With Washer – US50/50/8
HDCLT140Fasteners (Flange A)CSA5.0x50                 CNA4.0x50
Rd (kN)20.47                            8.55
Anchor (Flange B)FM 753 EVO M16-151/30FM-753 CRACK 3DG M16-150/30AT-HP + LMAS M16
Concrete Option711
Effective embedment depth (hef)8086192
Min. Member thickness (hmin)160170222
Charac. Spacing (scr,N)240258576
Charac. Edge distance (ccr,N)120120288
NRd (kN)23.523.351.4

Non-cracked concrete C20/25

No reinforcement for splitting

kmod: 1,1; service class : 2

Product capacities [kser]

References kser [kN/mm]
CNA4.0x40 CNA4.0x50 CNA4.0x60 CSA5.0x40 CSA5.0x50
HDCLT1401.21.51.94.45.2

Installation

Installation

Fastener

  • CSA Ø5mm or CNAØ4mm according to ETA-04/0013
  • On concrete: Heavy Duty Wedge Anchor, Injection system for concrete, High capacity undercut anchor, concrete screw

Installation

The connection to the wood is made with CNA nails or CSA connector screws.
The bolt must be verified for the tensile force to be absorbed.

Certification

Declaration of Performance (DoP)

European Technical Assessment (ETA)

Downloads

  • HDCLT Concealed Connecting for CLT Walls to Concrete

    HDCLT Concealed Connecting for CLT Walls to Concrete

    Designed specifically for connecting cross-laminated timber (CLT) wall panels to concrete foundations: the HDCLT tension tie provides a robust design uplift capacity of up to 22 kN, yet due to it’s low profile of just 140 mm, remains completely concealed within the subfloor and floor covering layers.

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Contact

Simpson Strong-Tie Poland

Simpson Strong-Tie Etanco P.S.A.

ul. Karczunkowska 42
02-871 Warszawa
Poland