Use and Care Manual

298
Copyright © 2020 MiTek Industries, Inc. All Rights Reserved
Deck & Fences
Deck & Fences
MiTek
®
Product Catalog
ADTT-TZ Adjustable Deck Tension Tie
Ref. No. W L D CL Qty Type
3,4,5
Qty Type
6,8
160% 160%
Contracted 820 0.070 820
Extended 850 0.117
810
Contracted 820 0.121
Extended 790 0.114
Contracted 830 0.080
Extended 835 0.113
Contracted 830 0.121
Extended 790 0.114
Contracted 830 0.121
Extended 790 0.114
1) Allowable loads are for the ADTT-TZ installed tight to the bottom of the joist (Contracted) or 4-inches from bottom of joist to ADTT-TZ bend line (Extended).
2) Deflections are derived from static, monotonic load tests of devices connected to DF wood members with specified fasteners.
3) WS8-EXT is a 1/4" dia. x 8" long double barrier coated screw sold by MiTek and must be ordered seperately if not purchasing the kit. The minimum thread
penetration into the top plate of the wall framing is 3-inches.
4) 3/8" HDG Lag Screw is an ASTM A307 Grade A lag screw with a thread diameter of 3/8" and is hot-dip galvanized to ASTM A153 standards. The minimum
thread penetration into the top plate of the wall framing is 3-inches. Lag screws are available at your local hardware store and must be purchased seperately.
5) Check with your siding manufacturer for recommendations for fastening through your siding material.
6) LL915 denotes a LumberLok Screw (#9 x 1-3/8" long) sold by MiTek and must be ordered seperately if not purchasing the kit.
7) ADTT-TZKT is a kit with (4) ADTT-TZ packaged with MiTek's WS8-EXT structural wood screws and LL915 LumberLok screws.
8) NAILS: 10d x 1-1/2 nails are 0.148" dia. x 1-1/2" long.
LL915
780
780
780
780
LL915
15/16 3/8 1 WS8-EXT 10
ADTT-TZKT
7
DTT1Z-KT 14 1-9/16 10-1/2
ADTT-TZ DTT1Z 14 1-9/16 10-1/2
10
10d x 1-1/2
HDG
15/16 3/8
1
3/8" HDG
Lag Screw
1 WS8-EXT
--
MiTek USP
Stock No.
DF/SP
Allowable
Tension (Lbs.)
S-P-F
Allowable
Tension (Lbs.)
Δ (in)
at 160%
2
Steel
Gauge
Wall Joist
Dimensions (in) Fastener Schedule
Installation
Type
1
10 LL915
10
10d x 1-1/2
HDG
10
Code
Ref.
Corrosion Finish
IBC, FL,
LA
IBC, FL,
LA
--
Corrosion Finish
Stainless Steel Gold Coat
HDG Triple Zinc
Corrosion Finish Stainless Steel Gold Coat HDG Triple Zinc
Corrosion
Finish
Stainless Steel
Gold Coat
HDG
Triple Zinc
1) Allowable loads are for the ADTT-TZ installed tight to the bottom of the joist (Contracted) or 4" from bottom of joist to
ADTT-TZ bend line (Extended).
2) Deflections are derived from static, monotonic load tests of devices connected to DF wood members with
specified fasteners.
3) WS8-EXT is a 1/4" dia. x 8" long double barrier coated screw sold by MiTek and must be ordered separately if
not purchasing the kit. The minimum thread penetration into the top plate of the wall framing is 3".
4) 3/8" HDG Lag Screw is an ASTM A307 Grade A lag screw with a thread diameter of 3/8" and is hot-dip galvanized
to ASTM A153 standards. The minimum thread penetration into the top plate of the wall framing is 3". Lag screws
are available at your local hardware store and must be purchased separately.
5) Check with your siding manufacturer for recommendations for fastening
through your siding material.
6) LL915 denotes a MiTek LumberLok Screw (#9 x 1-3/8" long) and must
be ordered separately if not purchasing the kit.
7) ADTT-TZKT is a kit with (4) ADTT-TZ packaged with MiTek WS8-EXT
structural wood screws and LL915 LumberLok screws.
8) NAILS: 10d x 1-1/2 nails are 0.148" dia. x 1-1/2" long.
Deck collapses are often caused by failure of the connection where the
deck is attached to the main structure due to little or no lateral capacity.
ADTT-TZ is an Adjustable Deck Tension Tie designed to effectively
transfer the out of plane lateral loads of the deck to the house structure.
Features:
• Exceeds “Hold-down Device” requirements per 2018 IRC, Section
507.9.2 [Figure R507.9.2(2)]
• Adjustable design allows lag screw installation at variable distance
below deck joist
• 2-hole break-out washer (BO-W) will work with multiple screw sizes
• Blocking extensions not required
Materials: 14 gauge
Finish: G-185 galvanizing
Codes: See chart for code references
Patents: U.S. Patent No. 9,809,974
Installation:
• Install with MiTek WS8-EXT structural wood screw or
3/8" HDG lag screw. WS8-EXT or 3/8" HDG lag screws
may be installed adjacent or up to 4-3/8" below
deck joist (see Figure A).
• Drive screw horizontally and aligned vertically with
the deck joist into the wall top plate of the main
(house) structure.
• Install four (4) of the specied joist fasteners into
vertical legs. (Two (2) on each side of deck joist).
• Secure front brace with six (6) specied joist fasteners.
• Re-tighten the WS8-EXT or 3/8" HDG lag screw as
needed to fully engage with the ADTT-TZ. DO NOT
OVERDRIVE. Note: Minimum 3" thread penetration
required for proper installation of WS8-EXT or HDG
lag screw.
• For detailed installation instructions refer
to MiTek-US.com.
Typical ADTT-TZ
full extension installation
Extended Installation
Typical ADTT-TZ
ush installation
Contracted Installation
Front brace
Vertical legs
ADTT-TZ
ready for installation
ADTT-TZ out of box
L
Front
brace
Vertical
legs
Hole for aligned
BO-W and
WS8-EXT or
HDG lag screw
installation
W
D
CL
Washer Detail
2-hole
break-out
washer
(BO-W)
Ledger
Deck joist
Figure A
ADTT-TZ
4-3/8"
Adjustability
Interior framing
WS8-EXT or 3/8"
HDG lag screw
Wall top
plate
Min 3"