Design Guide

Designing the Soffi-Steel® System to your project’s specifications entails a simple step-by-step process.

Size – Given that certain factors surrounding the utilities (size, positions, etc.) are often in question, some Architects or Engineers may include, “sized to accommodate the utilities” in their master specification. For the greatest economical benefit, the size of the Soffi-Steel® System encasement should be minimized without causing undue difficulty of utility installation.

Once sizing and positions of the utilities is determined, allow a minimum of 0.5 inch additional spacing between the outermost dimension of the utility and the inside of the cover.

Please note that the shield clips must be positioned prior to the installation of such utilities if the sizing is to be minimized, otherwise, the utility (pipe, conduit, etc.) may obstruct the anchoring of the clip.

If the clips are to be mounted subsequent to utility installation, add an additional 1.5 inch to each dimension.

For sidewall fire sprinkler installations, the pipe centerline must be a minimum of 4.0 inches from the ceiling to accommodate the UL listing of the sprinkler head. For most such commercial/residential installations, a 7”h x 5”w L-Design is common. For Institutional sidewall installations, the height dimension must be a minimum of 7” to accommodate the larger escutcheon plates.

For multiple utility installations, the cover size is determined by the number, size, positioning, and spacing of such conduits.

Grice Engineering, Inc. has the capability of producing encasements with a perimeter as large as 24 square feet (i.e. 4 ft. high x 6 ft. wide). Material can be supplied in dimensions ranging between 2 ¾” – 60” high/wide.

Shape – The most common shapes are the L-Shield used for sidewall installation and U-Shield in ceiling and varied wall installations. In addition, our U-Shield is occasionally used for sidewall installations. Many variations of these shapes are possible, some of which are shown in the CAD Drawings portion of this website. For any custom requirements, simply fax or e-mail a sketch of your desired configuration to our office for review, and we will contact you. Please forward your requests to sales@soffisteel.net or our fax: 608-757-1452.

Gauge of Material – Appropriate material thickness is typically determined by both the use and size of the application. We suggest the following as a guideline.

Residential/Commercial/Educational Facility Uses 

Cross Sectional Area of Cover Light Duty
Common Areas
80 Square Inches or Less 24 Gauge
20 Gauge
80 Square Inches to 4 Square Feet 20 Gauge
18 Gauge
*4 Feet to 6 Feet 18 Gauge
20 Gauge
*6 Feet to 24 Feet 18 Gauge
18-20 Gauge

* If bottom side of shield exceeds 30” wide, Angle Iron (1-1/2” x 1-1/2”) will be added every 24” on center to the inside of cover for stiffening purposes.

Please note: When installing our Commercial Soffi-Steel® System, seams are made to fight tightly and the internal couplings are pinched as sections are connected.

Institutional Uses

Cross Sectional Area of Cover
Cell Areas
Common Areas
80 Square Inches or Less
16 Gauge
18 Gauge
80 Square Inches to 4 Square Feet
16 Gauge
18 Gauge
*4 Feet to 6 Feet
14 Gauge
16 Gauge
*6 Feet to 24 Feet
14 Gauge
16 Gauge

* If bottom side of shield exceeds 30” wide, Angle Iron (1-1/2” x 1-1/2”) will be added every 24” on center to the inside of cover for stiffening purposes.

Please note: When installing our Institutional Soffi-Steel® System, seams are made to fit tightly. However, the internal couplings are instead riveted for security purposes.

Creating Design/Specifications – The type of system to be utilized (Residential, Commercial, Educational Facilities or Institutional) is generally determined by the type of and application within that facility. When specifying the choice of material composition and finish, it is typically based on the individual designer’s preference for a given appearance. There are some instances, however, where other factors need to be considered (i.e. highly corrosive atmospheres). Following is a reference chart indicating the most commonly accepted selections for specific installations.

Residential/Commercial/Educational Facility Applications

Type of Facility
Material /Finish
Gauge
Sealant
Hotels, Apartments, Nursing Homes, Hospitals, Universities, Dormitories
Powder Coated/Primed, Paintgrip
24-20
NP-1
Food Processing Areas, Medical Facilities
304 Stainless Steel, with #4 Finish
24
NP-1
Highly Corrosive Atmosphere
316 Stainless Steel, with #4 Finish
24
NP-1/Ultra

Institutional Applications

Type of Facility
Material /Finish
Gauge
Sealant
Psychiatric Wards, Group Homes
Powder Coated/Primed, Paintgrip,Stainless Steel, with #4 Finish
20-18
Ultra
Correctional Facilities:
Prisons, Jails, Detention Centers
Powder Coated/Primed, Paintgrip,Stainless Steel, with #4 Finish
18-16
Ultra


Sizing Reference Guide
– We have provided a means to figure the dimensions of shield to appropriately conceal your exposed utility. Please note that the methods shown for determining sizing may vary based on the substrate type and the actual required hanging assembly. For proper sizing on all other utilities unlisted below, please call our estimating department toll free at 1-800-800-3213 for assistance.

L-Shield Design

Type/Installation
Nominal Pipe Size/Type
L-Shield Size
Sidewall Fire Sprinkler System (Commercial/Educational Facilities)
< 2” CPVC, Copper, Threaded Steel Poz-Lok
7”h x 5”w
Sidewall Fire Sprinkler System (Commercial/Educational Facilities)
< 1 ½ ” Steel w/ Groove Fittings
> 2” CPVC, Copper, Threaded Steel
> 1 ½ ” Steel w/ Groove Fittings

Height min.= 5.5” + Maximum Fitting Overall Dimension

Width min.= 1” + Maximum Fitting Overall Dimension

Sidewall Fire Sprinkler System (Institutional)
< 2” All Types
7”h x 7”w
Sidewall Fire Sprinkler System (Institutional)
> 2” All Types

Height min.= 5.5” + Maximum Fitting Overall Dimension

Width min.= 1” + Maximum Fitting Overall Dimension

Plumbing/Hydronic Piping
All Sizes &Types
Height/Width min. = 1” + Maximum Fitting Overall Dimension

U-Shield Design

Type/Installation
Nominal Pipe Size/Type
U-Shield Size
Pendant Fire
Sprinkler System
< 1 ½” CPVC, Copper, Threaded Steel Poz-Lok
6”h x 6 ”w x 6”h
Pendant Fire
Sprinkler System
< 1 ½ ” Steel w/ Groove Fittings
< 2” -2½” CPVC, Copper, Threaded Steel
< 1 ½ ” Steel w/ Groove Fittings

6”h x 6 ”w x 6”h

Pendant Fire
Sprinkler System
Larger sizes - All Types
Height/Width min. = 1" + Maximum
Fitting Overall Dimension
Plumbing/Hydronic Piping
All Sizes &Types

Height min.= 5.5” + Maximum Fitting
Overall Dimension

Width min.= 1” + Maximum Fitting Overall Dimension

By referring to the contents of this section, you should be able to develop basic specifications for the size, shape, material gauge and finish for Residential, Commercial, Educational Facilities and Institutional applications of the Soffi-Steel® System. The staff of Grice Engineering, Inc. is qualified to assist with the design phase of your project. Please call us toll free at 1-800-800-3213 or contact us at sales@soffisteel.net.


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Grice Engineering Inc. • 121 East Burbank Avenue • Janesville, Wisconsin 53546
Phone: 608-757-1335 • Fax: 608-757-1452 • Toll Free: 1-800-800-3213