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 specied
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 specied 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
specied 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