Use and Care Manual

202
MiTek
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Product Catalog
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EWP Hangers
EWP Hangers
Wood I-Joist Installation to Wood
Sloped I-Joists
Use sloped seat hangers and beveled web stiffeners whenever the slope
exceeds the following: 1/2:12 for seat bearing lengths of 2-1/2" or less;
3/8:12 for bearing lengths between 2-1/2" and 3-1/2"; and 1/4:12 for
bearing lengths in excess of 3-1/2".
Multiple I-Joist Plies
Fasten together multiple plies of wood I-Joists, in accordance with
the manufacturer’s installation guidelines, such that the joists act as
a single unit.
I-Joist Rotation
It may be necessary to install straps, blocking, or sheathing to restrain
torsional rotation of a supporting wood I-Joist when using top mount
I-Joist hangers.
Fasteners
Install only the specied nails. The anges of wood I-Joists may split if
larger diameter nails or longer nails are installed. Do not install nails larger
than 16d common wire nails (0.162" diameter) into the web stiffeners in
the wood I-Joist.
Backer Blocks
Pattern the nails used to install backer blocks or web stiffeners in wood
I-Joists to avoid splitting the block. The nail pattern should be sufciently
spaced to avoid the same grain line, particularly with solid sawn backer
blocks. Backer blocks must be installed on wood I-Joist acting as the
header, or supporting member. Install in accordance with the I-Joist
manufacturer’s installation guidelines. The nails used to install hangers
mounted to an I-Joist header must penetrate through the web and into
the backer block on the opposite side.
The thickness of the hanger metal and nail heads on top mount hangers
must be evaluated for the effect on subsequent sheathing. Ensure that
the top mount hanger is installed so the anges of the hanger are not
over-spread which tends to elevate the supported I-Joist causing uneven
oor surfaces and squeaking. Similarly, ensure that the hanger is installed
plumb such that the face anges of the hanger are mounted rmly against
the wide-face surface of the header.
Common Nailing Errors
Wrong Angle
When a nail is driven into the bottom ange of the wood
I-Joist parallel to the glue lines, separation of veneers can occur
which substantially reduces the design loads of the connection.
Nail Too Long
When using nails longer than MiTek’s recommended nails,
bottom ange splitting may occur. Also, this can raise the wood
I-Joist off the seat, resulting in uneven surfaces and squeaky
oors along with reduced allowable loads.
Always secure wood I-Joist
using 10d x 1-1⁄2" nail driven
at a 30° to 45° angle and
rmly seated
Top Flange Hangers
Correct Slant Nail Installation
!
!
Flush framing
Hanger over-spread
Hanger not plumb
!!