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HCI+2

2-Foot Rail Extension

For Use with HCI-12 12-foot “

I

-beam” Rail

Installation Instructions

1. PRODUCT 

DESCRIPTION

The Model HCI+2 2-foot “

I

-rail” extension is designed to be compatible with 

the Model HCI-12 12-foot chain-drive “

I

-rail” used in commercial garage door 

installations and in carriage house garage door installations. The 2-foot extension, 
when added to the 12-foot “

I

-rail”, provides a 14-foot long rail for operating high-lift 

doors.

The kit includes two “T-rail” sections that bolt together to form an “

I

-rail” and 

connect to the main “

I

-rail” using two reinforcing straps. The kit also includes two 

short lengths of chain to extend the stock chain at the turnbuckle.

2. KIT 

CONTENTS

3.  LOOSEN AND DISASSEMBLE TURNBUCKLE

USA & Canada (800) 421-1587 & (800) 392-0123

(760) 438-7000 - Toll Free FAX (800) 468-1340

www.linearcorp.com

PRINTER’S INSTRUCTIONS:

INSTR,INSTL,I-RAIL,EXTENTION,2 FT - LINEAR P/N: 228232 A - INK: BLACK - MATERIAL: 20 LB. MEAD BOND - SIZE: 17.000” X 11.000” - SCALE: 1-1 - SIDE 1 OF 2

4. REMOVE 

SPROCKET

5.  REMOVE RAIL BOLT

6.  IDENTIFY TOP AND BOTTOM EXTENSION RAILS

7.  ALIGN REINFORCING STRAPS

8.  INSTALL FIRST TWO STRAP BOLTS

9. PLACE BOTTOM EXTENSION RAIL BETWEEN STRAPS

10. ALIGN TOP EXTENSION RAIL BETWEEN STRAPS

11.  INSTALL REMAINING TWO STRAP BOLTS

B

OTTOM 

R

AIL 

S

ECTION

TOP 

R

AIL 

S

ECTION

R

EINFO

R

CING 

S

T

R

AP

S

 (

2

)

EXTEN

S

ION CHAIN

S

 (

2

)

1/4-

2

0 KEP

S

 NUT

S

 (5)

1/4-

2

0 x 1

3

/16" CA

RR

IAGE 

B

OLT

S

 (5)

HOLD 

S

C

R

EWD

R

IVE

R

 IN 

TU

R

N

B

UCKLE 

S

LOT

LOO

S

EN THE TWO

TU

R

N

B

UCKLE LOCKING NUT

S

NOTE: ONE 

S

IDE OF THE

TURNBUCKLE I

S

 LEFT-HAND

THREAD, THE OTHER 

S

IDE

I

S

 RIGHT-HAND THREAD

UN

S

C

R

EW AND

R

EMOVE EACH

END F

R

OM THE

TU

R

N

B

UCKLE

TOP 

R

AIL 

S

ECTION

B

OTTOM 

R

AIL 

S

ECTION

NOTE: BOTTOM RAIL HA

S

 NOTCH ON CORNER!

R

EINFO

R

CING 

S

T

R

AP #1

R

EINFO

R

CING 

S

T

R

AP #

2

LINE UP 

S

LOT

S

 ON THE

R

EINFO

R

CING 

S

T

R

AP

S

WITH THE 

S

LOT

S

 ON THE

S

TOCK I-

R

AIL

AFTE

R

 THE CHAIN I

S

 LOO

S

ENED,

R

EMOVE THE 

S

P

R

OCKET HOLDE

R

F

R

OM THE END OF THE 

R

AIL

LOO

S

EN THE NUT

S

 AND

R

EMOVE THE TWO END

B

OLT

S

 ON THE 

R

AIL

NOTE: BE 

S

URE AND KEEP THE

NUT

S

 AND BOLT

S

, THEY WILL BE

U

S

ED AGAIN LATER

FIT THE TOP 

R

AIL 

S

ECTION

B

ETWEEN THE 

S

T

R

AP ON

THI

S

 

S

IDE AND THE 

B

OTTOM

R

AIL 

S

ECTION

R

AIL EDGE

S

MU

S

T LINE UP

TOP 

R

AIL 

S

ECTION

B

S

U

R

E ALL THE

S

LOT

S

 A

R

E ALIGNED

S

TOCK

I-

R

AIL

U

S

E 1/4-20 x 13/16" BOLT

S

AND KEP

S

 NUT

S

 

S

UPPLIED

IN

S

TALL THE LA

S

T TWO 

B

OLT

S

AND NUT

S

 TH

R

OUGH THE

R

EINFO

R

CING 

S

T

R

AP 

S

LOT

S

IN

S

TALL 

S

TRAP

S

 ON BOTH

S

IDE

S

 OF I-RAIL

U

S

E 1/4-20 x 13/16" BOLT

S

AND KEP

S

 NUT

S

 

S

UPPLIED

IN

S

TALL 

B

OLT AND NUT

IN THE 

S

ECOND 

S

LOT

IN

S

TALL 

B

OLT AND

NUT IN FI

RS

S

LOT

FIT 

B

OTTOM 

R

AIL 

S

ECTION

B

ETWEEN THE TWO

R

EINFO

R

CING 

S

T

R

AP

S

 

B

S

U

R

E ALL THE

S

LOT

S

 A

R

E ALIGNED

NOTCH ON THE BOTTOM RAIL
WILL BE ON THI

S

 END, BUTTING

UP TO THE NOTCH ON THE 

S

TOCK I-RAIL

B

OTTOM 

R

AIL 

S

ECTION

S

TOCK I-

R

AIL

R

AIL EDGE

S

 MU

S

T LINE UP

FO

R

 

S

MOOTH T

R

OLLEY

OPE

R

ATION

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