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Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
FM Approval Requirements:
The Viking Standard Response Horizontal Sidewall Sprinkler VK427 is FM Approved as standard response sidewall Non-Storage
sprinkler, as indicated in the FM Approval Guide. For specific application and installation requirements, reference the latest applicable
FM Loss Prevention Data Sheets (including 2-0) and Technical Advisory Bulletins. FM Global Loss Prevention Data Sheets and
Technical Advisory Bulletins contain guidelines relating to, but not limited to: minimum water supply requirements, hydraulic design,
ceiling slope and obstructions, minimum and maximum allowable spacing, and deflector distance below the ceiling.
NOTE:
The FM installation guidelines may differ from cULus and/or NFPA criteria
IMPORTANT: Always refer to Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614 for
general care, installation, and maintenance information. Viking sprinklers are to be installed in accordance with the latest
edition of Viking Technical Data, the appropriate standards of NFPA, LPCB, APSAD, VdS or other similar organizations, and
also with the provisions of governmental codes, ordinances, and standards, whenever applicable.
Top beam
clamp
Threaded rod
Uni-strut clamp
Uni-strut
Specific situations and conditions may exist that require alternative bracing methods to be used. Additional bracing methods
may also be used; the material(s) used must not break down, drip, over-spray, or otherwise interfere with or impede the
operation of the sprinkler—especially during fire conditions.
Form No. F_032319
Rev 02
© 2023 Viking Group Inc. All rights reserved
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
DESIGN CRITERIA - FM
Bar joist
Figure 8: Alternative Bracing Method
January 2023
Pendent sprinkler drop
NOTICE
(Added alternate deflector material; revised design criteria; removed UNS-C84400
Page 10 of 10
INSTITUTIONAL SPRINKLERS K5.6
Replaces F_032319 Rev 01
)
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