Use and Care Manual
Holdowns
71
Copyright © 2020 MiTek Industries, Inc. All Rights Reserved
Holdowns
MiTek
®
Product Catalog
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
LTS / LTTI Tension Ties
LTS series – The LTS19 is designed for nail-on installation
to 2x joists or studs, and the LTS20B provides a nail or bolt
fastening option. The LTS20B will accommodate wood I-Joists
if 10d (0.148") x 1-1⁄2" nails are used instead of the specied
16d nails.
LTTI31 – An open web joist tension tie designed for use with
masonry or concrete construction.
Materials: See chart
Finish: G90 galvanizing; LTS19-TZ – G-185 galvanizing
Codes: IBC, FL
Installation:
• Use all specied fasteners to attach the strap portion of
the connector to the side of stud, post, joist, purlin, or beam.
Secure the base to the concrete or masonry wall with
specied anchor bolt. A design professional shall specify
the type, length, and embedment of the anchor bolt.
• Washers are not required on transfer plates that t over
the anchor bolt.
• LTTI31 and LTS connectors must be mounted ush
to the mudsill.
• Allowable loads are based on either nail or bolt fastening;
nail and bolt values cannot be combined.
• Tighten anchor bolt nuts nger tight to base plus 1/3 to 1/2
additional turns with a wrench.
• Refer to MiTek’s LTS19-TZ Deck Lateral Load Connector
Technical Bulletin for deck rail reinforcement at MiTek-US.com.
LTTI31
LTS20BLTS19-TZTypical LTS
installation
Typical LTTI31
installation
Ref. No. Strap Plate W L D CL Qty Dia. Qty Type 160% Δ (in)
5
LTTI31
LTTI31 18 3 3-3/4 31 2-5/8 1-3/8 3 1 5/8 18 10d x 1-1/2 2805 0.175
LTS19-TZ
LTT19 16 3 1-3/4 22-1/4 3 1-1/2 2-1/2 1 3/4 8 10d HDG 1205 0.132
10 10d x 1-1/2 1100 0.128
10 16d 1105 0.128
2 1/2 Bolt 1175 0.128
1
)
Allowable loads have been increased 60% for wind or seismic loads; no further increase shall be
p
ermitted.
2
)
LTS20B bolted installation re
q
uires a minimum 1-1/2" wood member thickness.
3
)
16d sinkers ma
y
be substituted for the s
p
ecified 10d common nails with no load reduction.
4
)
The desi
g
ner must s
p
ecif
y
anchor bolt t
yp
e, len
g
th and embedment de
p
th.
5
)
Deflections are derived from static, monotonic load tests of devices connected to DF wood members with s
p
ecified fasteners.
6
)
LTTI and LTS holdowns shall be installed ti
g
ht to the sill
p
late.
7
)
NAILS: 10d x 1-1/2 nails are 0.148" dia. x 1-1/2" lon
g
, 10d nails are 0.148" dia. x 3" lon
g
, 16d nails are 0.162" dia. x 3-1/2" lon
g
.
Steel
Gauge
LTS20B LTT20B
MiTek USP
Stock No.
6
Code
Ref.
12
Fastener Schedule
Nail
Spacing
1-1/2 3-3/4 1
Dimensions (in)
3 2 20 3
Anchor
Bolt
4
Strap
2,3,7
IBC,
FL
3/4
DF/SPAllowable
Tension
Loads (Lbs.)
1
Corrosion
Finish
Hanger not shown
1/4" transfer
plate
W
L
D
CL
2-1/2"
1/4" transfer
plate
W
L
D
CL
3-3/4"
6-1/4"
W
L
D
6-3/16"
6"
3/8" Typ.
2-3/8"
11/16"
CL