Technical Specifications

51
Holdowns
© 2015 MiTek. All rights reserved.
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 / LTTI31 Tension Ties
Holdowns
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 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: See page 11 for Code Reference Key Chart
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. No washers required.
• Washers are not required on transfer plates that t over the
anchor bolt.
• LTTI31 and LTS connectors must be mounted ush to the surface of
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, snug, to base plus, 1/3 to 1/2
additional turns with a wrench. To prevent loosening of the anchor nut
during critical loading, use a locking nut or tighten a second nut over
the rst to lock nuts in place.
• Bolts must be ordered separately. See page 24 for available sizes.
LTTI31
LTS20B
LTS19-TZ
Typical 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 DTT1Z, LTT19 16 3 1-3/4 22-1/4 3 1-1/2 2-1/2 1 3/4 8 10d 1205 0.132
10 10d x 1-1/2 1100 0.128
10 16d 1105 0.128
2 1/2 1175 0.128
1
)
Allowable loads have been increased 60% for wind or seismic loads; no further increase shall be
p
ermitted.
2
)
Bolts re
q
uire a minumum len
g
th of 1-1/2" in vertical member for the listed loads.
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
.
New
p
roducts or u
p
dated
p
roduct information are desi
g
nated in blue font.
Steel
Gauge
LTS20B LTT20B
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
30,
F31
3/4
DF/SPAllowable
Tension
Loads (Lbs.)
1
Corrosion Finish
Hanger not shown
1/4" transfer
plate
1/4" transfer
plate
W
W
W
L
L
L
D
D
D
6-3/16"
6"
3/8" Typ.
2-3/8"
11/16"
CL
CL
CL
2-1/2"
3-3/4"
6-1/4"