Technical Specifications

ManualsBrandsMiTek ManualsConstruction Hardware3" x 21-5/8" Foundation Strap

Holdowns

LSTAD / STAD Foundation Straps

The coined dimples below the embedment line allow for increased concrete

bonding. These holdowns retain high uplift capacity even when installed at

corners of foundation stemwalls. Ideal for use with built up 2x end posts.

RJ after the model indicates LSTAD or STAD for rim joist applications as in

STAD8RJ. Rim joist models provide for a 17" clear span without the loss of

strap nailing.

Materials: LSTAD-14 gauge; STAD-12 gauge

Finish: G90 galvanizing

Codes: See page 11 for Code Reference Key Chart

Installation:

• Use all specied fasteners. See Product Notes, page 17. The bottom

(2) nails are for form board attachment only and do not contribute to

fastener schedule requirements.

• Embed holdown in concrete to the embedment line (bend line).

• See illustrations for requirements on rebar, edge distances,

and clear spans.

• Bending the strap horizontally 90° to facilitate wall placement may cause

concrete behind the embedded strap to break away at the top edge

(spalling). If the spall is 1" or less from the top edge of the concrete,

no load reduction is necessary. If the spall is between 1" and 4" the

allowable load is 0.90 of the published chart load.

• When installing on lumber less than 3-1/2" wide, wood splitting

may occur. To reduce splitting, use 10d x 1-1/2" nails or ll every

other hole with 16d common nails. Reduce allowable loads per code

requirements accordingly.

• These straps do not secure concrete sections together at cold joints;

take other measures to transfer the load. If there is a cold joint between

slab and foundation, the minimum embedment must be made into the

foundation. Fastening opportunities may be reduced because the slab

pour level may be higher than some nail holes. Using fewer fasteners will

reduce allowable loads. Reduce allowable load by the code capacity for

each fastener not installed.

• To achieve full table loads the minimum center-to-center spacing is

twice the embedment depth (IE) when resisting tension loads at the

same time.

• Where fewer fasteners are used in the structural wood member, reduce

loads according to the code.

• There may be an increase in the amount of deection if the strap

is installed on the outside of the sheathing, versus directly to the

framing members.

• Strap may be bent one complete cycle to aid installation.

Typical STAD10

edge installation

Typical STAD10

corner installation

LSTAD

STAD

STAD_RJ

Typical STAD14RJ

corner rim joist installation

Ref. No. Qty Nail W L

D CS 1/2" 1-1/2"

1/2" 1-1/2"

1) Wood thickness shall be no less than 2".

2) Allowable tension loads have been increased 60% for wind or seismic loads; no further increase shall be permitted.

3) Interpolate allowable loads for edge distances between those listed. Nail quantities may be reduced for less

than lE corner distance design loads- use the code allowable loads for fasteners in shear.

4) Where fewer fasteners are used in the structural wood member, reduce loads according to the code.

NAILS:

16d sinkers are 0.148" dia. x 3-1/4" long. 10d common (0.148" dia. x 3" long) nails may be substituted with no load reduction.

New products or updated product information are designated in

blue font

18-1/8 2225 2225

Min.

Stemwall

(in)

32203220 2225 2225 322014 24 16d Sinker 3 5

Code

Ref.

2000 psi 2500 psi 3000 psi

130

2225 2225 3220 22252225 2225 3220 2225 3220

2225 2225

Dimensions (in)

Steel

Gauge

Fastener Schedule

1,5

3 21-5/8 8 5

35-1/8 8

4-5/8

USP

Stock No.

LSTAD8

LSTAD8RJ LSTHD8RJ

LSTHD8 24 16d Sinker

DF/SP Allowable Tension Loads (160%)

2,3,4

Edge Distance - Concrete

Continued on next page

2x embedment

length + 12" min.

rebar length

1/2" min

rebar length

Edge distance

1/2" min from

corner

Edge distance

1/2" min from

corner

30" min rebar

length

Install (1)

#4 rebar in

shear cone

12" min. rebar

length

Nailed portion

Holdowns