Salsbury Industries 3800 User Manual

3800 Surface Mount Enclosures

For 3700 Series 4C Front Loading Horizontal Mailboxes

With its high quality design and construction, Salsbury’s 3800 series 4C horizontal mailbox surface mount enclosure will provide years of
maintenance free service. Please read this entire document before beginning installa tion.

WARNING: Installation of the 4C enclosure and mailbox unit must be to a surface of sufficient load bearing strength.

Attachment of the enclosure to the surface must be with fasteners that can adequately support the weight of the
enclosure and mailbox unit. Installing to a deficient load bearing mounting surface and/or use of inadequate fasteners
could cause the 4C enclosure and mailbox unit to fall from the surface possibly resulting in serious injury. See below for
further information.

Installation Planning

1. Determine the horizontal location of each of the 3700 series
mailbox units with its 3800 series wall mount enclosure.

2. Consider the combined weights in the table below when
designing the wall or selecting the appropriate fasteners and
anchors to be used.

3. If attaching to studs in a custom built wall, determine the
optimum location of the wall studs to which to fasten the
enclosures. Frame the wall with wood studs. Build a robust
wall.

4. If attaching to studs in an existing wall, determine the stud
locations, and position enclosures to maximize the number of
studs to which the enclosures will be attached.

5. If not attaching to studs, choose an appropriate high strength
anchor, especially if attaching directly to drywall. When
attaching to drywall, place the anchor and fastener as close as
possible to the studs to which the drywall is attached.

Weight of Mailbox Unit and Wall Enclosure

Enclosure Model Total Weight - Lbs. Enclosure Model Total Weight - Lbs.

3816D 305 3816S 210
3815D 285 3815S 195
3813D 260 3813S 175
3811D 240 3811S 150
3809D 200 3809S 135
3807D 160 3807S 110
3805D 125 3805S 80
3803D 100 3803S 65

The weights above include the mailbox unit, the wall mount enclosure, and from 15 to 75 lbs

of mail depending on the size of the mailbox unit.

USPS Height Regulations

1. The USPS arrow lock in the Carrier Access Door shall be
located between 36” and 48” above the finished floor (AFF).

2. No tenant mailbox lock shall be located more than 67” AFF.

Installation Instructions

3. No tenant mailbox compartment (interior bottom shelf surface)
shall be positioned less than 28” AFF.

4. No parcel locker compartment (interior bottom shelf) shall be
positioned less than 15” AFF.

5. At least one tenant mailbox compartment shall be positioned
less than 48” AFF.

Types of Fasteners Used

Type A, Fig. 1 - If fastening into wood studs, use a #12x2” wood
screw (not supplied). If fastening into metal studs or directly into dry
wall, choose and use an appropriate wall anchor with screw.

Fig. 1

Type A

Type B, Fig. 2 – To fasten the mailbox unit into the enclosure, use
the #8x3/4” pan head self-tapping screws (supplied).

Fig. 2

Type B

Marking Distance from Floor and Stud Location

Mark the wall with a horizontal line representing the distance from the
floor to the bottom surface of the enclosure. The distance from the
bottom surface of the enclosure to the surface of the lowest
compartment shelf or the parcel locker shelf is 2-7/16”. The distance
from the bottom surface of the enclosure to the floor may be derived
from the USPS Height Regulations above. Pay particular attention to
the height limitations for the USPS Arrow Lock in the Carrier Access
Door.

SALSBURY INDUSTRIES

1010 East 62nd Street, Los Angeles, CA 90001-1598
Ph: 1-800-624-5269 Int’l Ph: 323-846-6700
Fx: 1-800-624-5299 Int’l Fx:
www.mailboxes.com [e-mail]

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 © 2011 Salsbury Industries. All rights reserved. (P/N 380001, Rev. 12, 3/2/2011) Page 1 of 3

323-846-6800

It is recommended that the enclosure be tied to studs due to its
significant total weight including the 3700 series mailbox unit. If
attaching to studs, mark the wall with two (2) vertical lines
representing two (2) wall studs to which the enclosure will be
fastened.

If not attaching to studs, install appropriately strong anchors and
fasteners to engage the outermost slots in the rows of slots in the
rear panel.

Installing Wall Fasteners

Install Type A wood screws, Fig. 3 (or anchors and fasteners) into all
of the outermost slots (or slots engaging wood studs) in the rear
panel. Install two (2) of the Type A wood screws, not provided, (or
anchors and fasteners, not provided) in the rear flange of the top
panel and in the rear flange of the bottom panel so that the four (4)
screws go through the elongated slots in the rear flanges and into the
wood studs. See the “Screw Locations”, Fig. 4.

Installing Mailbox Unit

Lifting and installing the mailbox unit into the enclosure is a two (2)
person operation. Open appropriate compartment doors to provide
handholds. Lift the mailbox unit and carefully slide it into the
enclosure until the front peripheral flange is flush against the front
flanges of the enclosure. See Fig. 5.

Fig. 5

Type A

Fig. 3

Screw Locations

Fig. 4 identifies the locations of the Type A fasteners that are used to
attach the enclosure to the wall studs.

Fig. 4

Type A

Type A

Fastening Mailbox Unit to Enclosure

Open the master door(s) of the mailbox unit until the hold-open rods
at the top inside corners of the doors engage. Install Type B self­tapping machine screws (provided) in the flanges all around the four
(4) sides of the mailbox unit just behind the master door(s). See the
following illustrations to locate the flanges. Pilot holes are provided
for the screws in the flanges. The double column mailbox unit shown
uses four (4) screws each along the top and bottom flanges. The
single column mailbox unit (not shown) uses only two (2) screws
each along the top and bottom. See Fig. 6.

Type B

TOP

Fig. 6

Type B

BOTTOM

Type B

BOTTOM

SALSBURY INDUSTRIES

1010 East 62nd Street, Los Angeles, CA 90001-1598
Ph: 1-800-624-5269 Int’l Ph: 323-846-6700
Fx: 1-800-624-5299 Int’l Fx:
www.mailboxes.com [e-mail]

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 © 2011 Salsbury Industries. All rights reserved. (P/N 380001, Rev. 12, 3/2/2011) Page 2 of 3

323-846-6800