Carnes PDBB User Manual

Specification Sheet

Model PDBB

Extruded Aluminum Drainable Blade Penthouse

CARNES COMPANY 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: [phone] Fax: [phone] www.carnes.com

COPYRIGHT © 2010 CARNES COMPANY

ALL RIGHTS RESERVED

SUPERCEDES 17142 17142-A, pg 1

Tag Qty.

Size

Variations

Width Length Height

Project Location
Arch./Engr. Contractor
Representative Date

Model PDBB
Standard Specifications

Blades: 6063-T6 extruded aluminum with .081” (2.1mm) thick­ness. All units incorporate hidden mullions at 60” (1219mm)
centers for blade support.
Roof: Fabricated at .050” (1.3mm) thickness 3003-H14 formed
aluminum, roof is secured with sheet metal screws for ease in
removal. Models with pitched roofs have a 1” in 12” or 3” in 12”
(25.4mm in 305mm or 76mm in 305mm) pitch.
Internal Framing: 1-1/2” x 1-1/2” x 1/8” (38mm x 38mm) fram­ing angles of 6063-T6 extruded aluminum on 48” (1219mm)
maximum centers.

Screen: 3/4” x .051” flattened aluminum bird screen
Finish: all aluminum mill finish for low maintenance and resist-

ance to corrosion.
Sizing: Order size is actual throat dimensions. Throat is
undercut 1/4” (6 mm) in both “A” and “B” dimensions for instal­lation allowance.

Maximum: 72”w x 220”L x 80”h (1829mm x 5588mm x
2032mm) Unlimited size with multiple section assembly.
Minimum: 12”w x 12”L x 10”h (305mm x 305mm x 267mm)

Options (at additional cost)

- Filter Racks

- Security Bars

- Hinged Roof

- Duct Liner

- Curb Cap

- Variety of Screens

- Selection of finishes; prime coat, kynar, baked enamel, clear
and color anodize, epoxy and heresite.

Consult Carnes for other special requirements.

Standard Curb Cap Installation

Roof
Curb

Curb Cap

Special
curb cap
dimension

2-3/4”
(std.)

Curb Cap I.D.

(Throat Dim. + 4-1/2”, std.)

3”

2”

C

Water Diverter

Pitched Roof
Option Shown

1-1/2”
Internal Support
Structure

Screen

2.879”

typ. blade
spacing

Internal Sill/Water Catch

Throat Dimension

A x B

A and B dimensions approximately 1/4” under listed size.

17142-A, pg 2

Flat roofs are cross broke for adequate element
run off. Roofs are supported by angle bracing
which prevents oil canning. When size requires the
unit be sectioned, it is joined with a standing seam
to prevent leakage. This style of roof is available
on units up to 72” on the shortest dimension only,
larger units must incorporate a pitched style roof.

Pitched roofs (pitched on short width) are support­ed with a superior truss system which not only
create the structural integrity comparable to that of
a building, but eliminates the rolling sound of wind
across the roof. Trusses are placed at a maximum
24” centers and anchored to the internal frame of
the structure. When size requires the unit be sec­tioned, it is joined with a standing seam to prevent
leakage.

Flat

Pitched

Performance Data

AMCA Standard 500 provides a reasonable basis for testing and
rating louvers. Testing to AMCA 500 is performed under a certain
set of laboratory conditions. This does not guarantee that other
conditions will not occur in the actual environment where louvers
must operate.

The louver system should be designed with a reasonable safety
factor for louver performance. To ensure protection from water car­ryover, design with a performance level somewhat below maximum
desired pressure drop and .01 oz./sq.ft. of water penetration.

Corner Style Selection

Drainable units available in post corner only.
Independent louver panels (sides) are built and
mounted to the internal framing with corner covers
installed.

Beginning point of WATER PENETRATION lies
above 1250 fpm the maximum recommended
FREE AREA VELOCITY

Pressure Drop

Static Pressure Drop (inches w.g.)

FREE AREA VELOCITY (FT/MIN)

Standard air - .075 lbs per cu ft
Ratings do not include the effects of a wire bird screen
Test based on a 48” x 48” test size, 15 min test duration

Roof Style Selection