Installation Guide

IMPORTANT !
With its quality design and construction, Salsbury Industries’ 3700 series USPS approved 4C recessed mounted horizontal mailboxes will provide years
of maintenance free service. These units meet all the requirements of USPS STD-4C, the new high-security standard developed by the United States
Postal Service.
TYPICAL INSTALLATION
Have mailboxes and instructions on hand before
starting wall construction.
Unpack and review contents of shipping cartons.
Gather tenant and parcel locker keys and store in a
secure place.
Read installation instructions document thoroughly.
Determine rough opening size(s).
Determine rough opening location above finished floor.
Determine framing configuration and location.
Procure materials for wall construction.
Although these mailboxes have been tested and
approved for both outdoor and indoor use, some
shelter from direct weather conditions should be
provided, especially in areas with heavy rainfall. This
provides protection for the mail, the delivery personnel,
and the mail patrons.
The mailboxes are shipped fully assembled.
Hardware is included to fasten each unit into a wood
framed wall.
Trim is an integral part of the mailbox assembly. There
is no other snap on trim to install.
The floor of the lowest patron mailbox shall be no less than 28”
above the finished floor (AFF).
The patron lock in the highest mailbox shall be no more than 67” above the
finished floor.
The USPS Arrow lock (master door lock) opening must be a minimum of
36” and a maximum of 48” above the finished floor.
The floor of the lowest parcel locker shall be no less than 15” above the
finished floor.
The master access door(s) must be allowed to open a minimum of 90
degrees with no obstruction.
There must be at least one parcel locker for every ten patron mailboxes in
installations of 10 or more patron mailboxes. Parcel lockers must be a
minimum of 15” high (PL4.5, PL5 and PL6) to meet the 1:10 ratio. Once
this ratio has been met, smaller parcel lockers (PL3 and PL4) may also be
added. There is no requirement for parcel lockers in installations of less
than 10 patron mailboxes, but one or more parcel lockers is recommended.
PREPARATORY STEPS
1.
2.
3.
4.
5.
6.
7.
8.
NOTES
1.
2.
3.
4.
USPS REGULATIONS
The mailboxes must be installed according to Postal Regulations.
1.
2.
3.
4.
5.
6.
4C recessed mounted horizontal mailboxes can be
installed either with the included connector kits (see
instructions on pages 2-5) or separately with indi-
vidual wall framing (see page 6).
After installing the unit, contact your local postmaster – the USPS will provide and install its own master lock
on your mailbox unit. Hardware and instructions for installing the master lock are included inside the unit.
Please provide the hardware and instructions to the USPS representative when they arrive to install the lock.
U.S.P.S. APPROVED
Installation instructions are provided as general guidelines. It is advised that a professional installer be consulted. Salsbury Industries assumes
no product assembly or installation liability. Copyright © 2015 Salsbury Industries. All rights reserved. (Rev. 20, 02/10/2017)
SALSBURY INDUSTRIES
1010 East 62nd Street, Los Angeles, CA 90001-1598
Phone: [phone] Int’l Phone: [phone] Fax: [phone] Int’l Fax: [phone]
www.mailboxes.com [e-mail]
Page 1 of 6
67” AFF -
HIGHEST
POSITION
FOR PATRON
LOCK
48” AFF -
HIGHEST
POSITION FOR
AT LEAST
(1) PATRON
COMPARTMENT
48” AFF
36” AFF
CARRIER DOOR
ACCESS LOCK MUST
FALL BETWEEN
THESE DIMENSIONS
28” AFF -
LOWEST
PATRON
SHELF
SURFACE
15” AFF -
LOWEST
PARCEL
LOCKER
SHELF
SURFACE
FINISHED
FLOOR
CARRIER
ACCESS
DOOR LOCK
4C Recessed Mounted Horizontal Mailboxes – 3700 Series
FRONT LOADING Installation Instructions