Use and Care Manual

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Holdowns

MiTek

Product Catalog

UPHD Holdowns

Engineered for high capacity with minimum deection and low eccentricity.

Installs with screws eliminating the need for predrilling and potential

fastener slip. No thru bolts to countersink.

Materials: See chart

Finish: Primer

Codes: IBC, FL, LA

Installation:

• Use all specied fasteners. See Product Notes, page 18.

• Place holdown over anchor bolt and drive screws into post.

• Tighten anchor bolt nuts nger tight to base plus 1/3 to 1/2

additional turns with a wrench.

• Holdown may be installed off of the plate with no load reduction.

Reference page 72 for more information.

• If used to anchor a built-up post, such as a double 2x4, the post

component shall be designed to act as a single unit. Holdown fasteners

specied shall not be considered to attach multiple plies together.

DF/SP S-P-F

Ref. No. W H D CL Qty Dia. Qty Type

UPHD8 HDQ8-SDS3 10 3-1/4 17-1/2 3-1/8 1-3/8 1 7/8 24 WS3 9165 7695 0.075

UPHD9 HDU11-SDS2.5 10 3-1/4 17-1/4 3-1/2 1-1/2 1 1 24 WS3 11270 9465 0.057

UPHD11 HHDQ11-SDS2.5 7 3 15-1/8 3-1/2 1-1/2 1 1 24 WS3 14395 12090 0.077

UPHD14

HDU14-SDS2.5,

HHDQ14-SDS2.5

7 3 18-3/4 3-1/2 1-1/2 1 1 30 WS3 16695 14020 0.082

1) Allowable loads have been increased 60% for wind and seismic loads; no further increase shall be permitted.

2) The designer must specify anchor bolt type, length, and embedment.

3) Deflections are derived from static, monotonic load tests of devices connected to DF-L wood members with specified fasteners.

4) The designer shall consider the effect of compression, bearing, tension, and combined bending due to device eccentricity when applicable.

5) The UPHD may be elevated off the sill and may increase deflection. Reference page 72 for more information.

6) MiTek's WS3 structural wood screws are 1/4" dia. x 3" long and are included with UPHD models.

7) Minimum post thickness is 3" or greater. Consult MiTek for installations less than 3".

MiTek USP

Stock No.

Steel

Gauge

Dimensions (in)

Screws

Anchor

Bolts

Fastener Schedule

Code

Ref.

IBC,

FL,

Tension

160%

Deflection

Δ (in)

at 160%

Allowable Loads (Lbs.)

1,5,7

Tension

160%

Typical UPHD

installation

UPHD

Typical UPHD

concrete wall installation