Installation Guide
SALSBURY INDUSTRIES 
1010 East 62
nd
 Street, Los Angeles, CA 90001-1598 
Phone: 1-800-624-5269 Int’l Phone: 323-846-6700 
Fax: 1-800-624-5299 Int’l Fax: 323-846-6800 
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 © 2010 Salsbury Industries. All rights reserved. (Rev. 04, 7/28/2010) 
With their durable powder coat finish and all aluminum construction, 
Salsbury’s 3500 series vertical mailboxes will provide years of 
maintenance free service. 
SURFACE MOUNTED
RECESSED MOUNTED
Units mount directly to a 
surface and are attached 
with mounting hardware 
through the back. 
(Hardware not included.)
Units fit into a rough 
opening and are secured 
with mounting hardware 
through the back or side 
panels of the unit. 
Recessed units include a 
flanged collar which fits 
over the rough opening. 
(Hardware not included.)
Surface unit dimensions 
Recessed unit rough opening dimensions 
SURFACE  Width  Height    Depth 
3503 18-3/4” 19”  7-1/2” 
3504  24-1/4”  19”  7-1/2” 
3505 29-3/4” 19”  7-1/2” 
3506  35-1/4”  19”  7-1/2” 
3507  40-3/4”  19”  7-1/2” 
RECESSED  1-High  2-High 
3503 17-1/4” 17-3/4” 36-3/4” 7-1/2” 
3504  22-3/4”  17-3/4”  36-3/4” 7-1/2” 
3505 28-1/4” 17-3/4” 36-3/4” 7-1/2” 
3506  33-3/4”  17-3/4”  36-3/4”  7-1/2” 
3507 39-1/4” 17-3/4” 36-3/4” 7-1/2” 
Vertical Mailboxes – 3500 Series 
Installation Instructions 
PLEASE SEE IMPORTANT INSTRUCTIONS ON BACK 
These units are U.S.P.S. approved to the required 
security upgrades of USPS-STD-4B+ effective March 
2005. 
Notes 
1. No more than two tiers of mailboxes may be installed. 
2. Wall opening and lumber frame must be square. 
3. Mailboxes should be shielded from direct weather conditions. 
4. Store keys in a safe place until ready for use. 
5. Hardware is not included to fasten units into rough opening. 
Installation Instructions 
1. If recessed unit, create rough opening in wall per dimensions in 
Rough Opening Table. Units must be securely supported by a frame 
constructed of 2”x4” lumber. 
2. Remove unit from carton and place in an upright position on a 
table or other flat surface. 
3. Remove the compartment assembly from the frame by tilting the 
compartment assembly forward until it extends approximately two 
inches from the frame. Then lift the compartment assembly upward 
so that its base clears the hinge pins located at the bottom of the 
unit. Swing the lower end of the compartment assembly outward and 
remove it from the frame. 
4. Mount the frame in the desired location. Caution: Do not deform, 
force, or twist the frame to fit an incorrect rough opening or 
irregular surface. If the frame becomes deformed, it will not retain 
proper alignment with the compartment assembly. Units serviced by 
the United States Postal Service must be installed with the master 
lock opening a minimum of 30” and a maximum of 58” above the 
finished floor. 
5. Replace the compartment assembly into the frame, reversing the 
procedure in step 3 above. 
Security Caution 
The tenant door at or near the center of the compartment array, in 
addition to providing access to a tenant’s mail, also provides access 
to the USPS Arrow Lock that provides access to all compartments. 
For the sake of security of the entire compartment array, it is 
important that this tenant door be securely locked at all times, 
even if there is no tenant receiving mail via this door. 


