Interior Ceiling Spans Lookup | ClarkDietrich iTools

28 Ceiling Systems Shown

Design Notes

162PDS125-15-50ksi-P

Pro25 (15mil 50ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 7'-3" 7'-3" 6'-10"
16 6'-8" 6'-8" 6'-3"
24 5'-11" 5'-11" 5'-5"

Spacing	L/120	L/240	L/360
12	7'-3"	7'-3"	6'-10"
16	6'-8"	6'-8"	6'-3"
24	5'-11"	5'-11"	5'-5"

162PDS125-18-70ksi-P

Pro20 (18mil 70ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 - 7'-10" 7'-4"
16 - 7'-3" 6'-8"
24 - 6'-6" 5'-10"

Spacing	L/120	L/240	L/360
12	-	7'-10"	7'-4"
16	-	7'-3"	6'-8"
24	-	6'-6"	5'-10"

162PDS125-30-33ksi-P

Pro30MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 9'-4" 9'-4" 8'-7"
16 8'-7" 8'-7" 7'-10"
24 7'-8" 7'-8" 6'-10"

Spacing	L/120	L/240	L/360
12	9'-4"	9'-4"	8'-7"
16	8'-7"	8'-7"	7'-10"
24	7'-8"	7'-8"	6'-10"

162PDS125-33-33ksi-P

Pro33MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 9'-9" 9'-9" 9'-0"
16 9'-0" 9'-0" 8'-2"
24 8'-0" 8'-0" 7'-2"

Spacing	L/120	L/240	L/360
12	9'-9"	9'-9"	9'-0"
16	9'-0"	9'-0"	8'-2"
24	8'-0"	8'-0"	7'-2"

250PDS125-15-50ksi-P

Pro25 (15mil 50ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 8'-4" 8'-4" 8'-4"
16 7'-8" 7'-8" 7'-8"
24 6'-11" 6'-11" 6'-11"

Spacing	L/120	L/240	L/360
12	8'-4"	8'-4"	8'-4"
16	7'-8"	7'-8"	7'-8"
24	6'-11"	6'-11"	6'-11"

250PDS125-18-70ksi-P

Pro20 (18mil 70ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 - 9'-0" 9'-0"
16 - 8'-5" 8'-5"
24 - 7'-7" 7'-7"

Spacing	L/120	L/240	L/360
12	-	9'-0"	9'-0"
16	-	8'-5"	8'-5"
24	-	7'-7"	7'-7"

250PDS125-30-33ksi-P

Pro30MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 10'-4" 10'-4" 10'-4"
16 9'-7" 9'-7" 9'-7"
24 8'-6" 8'-6" 8'-6"

Spacing	L/120	L/240	L/360
12	10'-4"	10'-4"	10'-4"
16	9'-7"	9'-7"	9'-7"
24	8'-6"	8'-6"	8'-6"

250PDS125-33-33ksi-P

Pro33MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 10'-9" 10'-9" 10'-9"
16 9'-11" 9'-11" 9'-11"
24 8'-10" 8'-10" 8'-10"

Spacing	L/120	L/240	L/360
12	10'-9"	10'-9"	10'-9"
16	9'-11"	9'-11"	9'-11"
24	8'-10"	8'-10"	8'-10"

350PDS125-15-50ksi-P

Pro25 (15mil 50ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Web-height to thickness ratio exceeds 200 - Web stiffeners are required at bearing points.

Spacing L/120 L/240 L/360
12 9'-1" 9'-1" 9'-1"
16 8'-5" 8'-5" 8'-5"
24 7'-6" 7'-6" 7'-6"

Spacing	L/120	L/240	L/360
12	9'-1"	9'-1"	9'-1"
16	8'-5"	8'-5"	8'-5"
24	7'-6"	7'-6"	7'-6"

350PDS125-18-70ksi-P

Pro20 (18mil 70ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 - 9'-10" 9'-10"
16 - 9'-1" 9'-1"
24 - 8'-2" 8'-2"

Spacing	L/120	L/240	L/360
12	-	9'-10"	9'-10"
16	-	9'-1"	9'-1"
24	-	8'-2"	8'-2"

350PDS125-30-33ksi-P

Pro30MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 11'-2" 11'-2" 11'-2"
16 10'-4" 10'-4" 10'-4"
24 9'-3" 9'-3" 9'-3"

Spacing	L/120	L/240	L/360
12	11'-2"	11'-2"	11'-2"
16	10'-4"	10'-4"	10'-4"
24	9'-3"	9'-3"	9'-3"

350PDS125-33-33ksi-P

Pro33MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 11'-7" 11'-7" 11'-7"
16 10'-8" 10'-8" 10'-8"
24 9'-7" 9'-7" 9'-7"

Spacing	L/120	L/240	L/360
12	11'-7"	11'-7"	11'-7"
16	10'-8"	10'-8"	10'-8"
24	9'-7"	9'-7"	9'-7"

362PDS125-15-50ksi-P

Pro25 (15mil 50ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Web-height to thickness ratio exceeds 200 - Web stiffeners are required at bearing points.

Spacing L/120 L/240 L/360
12 9'-2" 9'-2" 9'-2"
16 8'-6" 8'-6" 8'-6"
24 7'-7" 7'-7" 7'-7"

Spacing	L/120	L/240	L/360
12	9'-2"	9'-2"	9'-2"
16	8'-6"	8'-6"	8'-6"
24	7'-7"	7'-7"	7'-7"

362PDS125-18-70ksi-P

Pro20 (18mil 70ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 - 9'-11" 9'-11"
16 - 9'-2" 9'-2"
24 - 8'-3" 8'-3"

Spacing	L/120	L/240	L/360
12	-	9'-11"	9'-11"
16	-	9'-2"	9'-2"
24	-	8'-3"	8'-3"

362PDS125-30-33ksi-P

Pro30MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 11'-3" 11'-3" 11'-3"
16 10'-5" 10'-5" 10'-5"
24 9'-4" 9'-4" 9'-4"

Spacing	L/120	L/240	L/360
12	11'-3"	11'-3"	11'-3"
16	10'-5"	10'-5"	10'-5"
24	9'-4"	9'-4"	9'-4"

362PDS125-33-33ksi-P

Pro33MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 11'-8" 11'-8" 11'-8"
16 10'-9" 10'-9" 10'-9"
24 9'-8" 9'-8" 9'-8"

Spacing	L/120	L/240	L/360
12	11'-8"	11'-8"	11'-8"
16	10'-9"	10'-9"	10'-9"
24	9'-8"	9'-8"	9'-8"

400PDS125-15-50ksi-P

Pro25 (15mil 50ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Web-height to thickness ratio exceeds 200 - Web stiffeners are required at bearing points.

Spacing L/120 L/240 L/360
12 9'-5" 9'-5" 9'-5"
16 8'-9" 8'-9" 8'-9"
24 7'-10" 7'-10" 7'-10"

Spacing	L/120	L/240	L/360
12	9'-5"	9'-5"	9'-5"
16	8'-9"	8'-9"	8'-9"
24	7'-10"	7'-10"	7'-10"

400PDS125-18-70ksi-P

Pro20 (18mil 70ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 - 10'-2" 10'-2"
16 - 9'-5" 9'-5"
24 - 8'-6" 8'-6"

Spacing	L/120	L/240	L/360
12	-	10'-2"	10'-2"
16	-	9'-5"	9'-5"
24	-	8'-6"	8'-6"

400PDS125-30-33ksi-P

Pro30MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 11'-7" 11'-7" 11'-7"
16 10'-9" 10'-9" 10'-9"
24 9'-8" 9'-8" 9'-8"

Spacing	L/120	L/240	L/360
12	11'-7"	11'-7"	11'-7"
16	10'-9"	10'-9"	10'-9"
24	9'-8"	9'-8"	9'-8"

400PDS125-33-33ksi-P

Pro33MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 12'-0" 12'-0" 12'-0"
16 11'-1" 11'-1" 11'-1"
24 9'-11" 9'-11" 9'-11"

Spacing	L/120	L/240	L/360
12	12'-0"	12'-0"	12'-0"
16	11'-1"	11'-1"	11'-1"
24	9'-11"	9'-11"	9'-11"

550PDS125-15-50ksi-P

Pro25 (15mil 50ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Web-height to thickness ratio exceeds 260 - Web stiffeners are required at bearing points.

Spacing L/120 L/240 L/360
12 - 10'-5" 10'-5"
16 - 9'-8" 9'-8"
24 - 8'-8" 8'-8"

Spacing	L/120	L/240	L/360
12	-	10'-5"	10'-5"
16	-	9'-8"	9'-8"
24	-	8'-8"	8'-8"

550PDS125-18-70ksi-P

Pro20 (18mil 70ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Web-height to thickness ratio exceeds 260 - Web stiffeners are required at bearing points.

Spacing L/120 L/240 L/360
12 - 11'-6" e 11'-6" e
16 - 10'-7" e 10'-7" e
24 - 9'-6" e 9'-6" e

Spacing	L/120	L/240	L/360
12	-	11'-6" e	11'-6" e
16	-	10'-7" e	10'-7" e
24	-	9'-6" e	9'-6" e

550PDS125-30-33ksi-P

Pro30MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 12'-10" 12'-10" 12'-10"
16 11'-10" 11'-10" 11'-10"
24 10'-8" 10'-8" 10'-8"

Spacing	L/120	L/240	L/360
12	12'-10"	12'-10"	12'-10"
16	11'-10"	11'-10"	11'-10"
24	10'-8"	10'-8"	10'-8"

550PDS125-33-33ksi-P

Pro33MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 13'-3" 13'-3" 13'-3"
16 12'-3" 12'-3" 12'-3"
24 11'-0" 11'-0" 11'-0"

Spacing	L/120	L/240	L/360
12	13'-3"	13'-3"	13'-3"
16	12'-3"	12'-3"	12'-3"
24	11'-0"	11'-0"	11'-0"

600PDS125-15-50ksi-P

Pro25 (15mil 50ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Web-height to thickness ratio exceeds 260 - Web stiffeners are required at bearing points.

Spacing L/120 L/240 L/360
12 - 10'-8" 10'-8"
16 - 9'-10" 9'-10"
24 - 8'-10" 8'-10"

Spacing	L/120	L/240	L/360
12	-	10'-8"	10'-8"
16	-	9'-10"	9'-10"
24	-	8'-10"	8'-10"

600PDS125-18-70ksi-P

Pro20 (18mil 70ksi)

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Web-height to thickness ratio exceeds 260 - Web stiffeners are required at bearing points.

Spacing L/120 L/240 L/360
12 - 11'-10" 11'-10"
16 - 10'-11" 10'-11"
24 - 9'-10" 9'-10"

Spacing	L/120	L/240	L/360
12	-	11'-10"	11'-10"
16	-	10'-11"	10'-11"
24	-	9'-10"	9'-10"

600PDS125-30-33ksi-P

Pro30MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 13'-1" 13'-1" 13'-1"
16 12'-2" 12'-2" 12'-2"
24 10'-11" 10'-11" 10'-11"

Spacing	L/120	L/240	L/360
12	13'-1"	13'-1"	13'-1"
16	12'-2"	12'-2"	12'-2"
24	10'-11"	10'-11"	10'-11"

600PDS125-33-33ksi-P

Pro33MIL

Ceiling Design

Single Span Ceiling (Unbraced), 4psf

Spacing L/120 L/240 L/360
12 13'-6" 13'-6" 13'-6"
16 12'-6" 12'-6" 12'-6"
24 11'-3" 11'-3" 11'-3"

Spacing	L/120	L/240	L/360
12	13'-6"	13'-6"	13'-6"
16	12'-6"	12'-6"	12'-6"
24	11'-3"	11'-3"	11'-3"

Notes

For unbraced sections, allowable moment is based on AISI S100 Specification Section F2 & F3 with weak axis and torsional unbraced length assumed to be the listed span (completely unbraced).
Web crippling calculation based on bearing length = 1 inch.
Web crippling and shear capacity have not been reduced for punchouts. If web punchouts occur near support members must be checked for reduced shear and web crippling in accordance with the AISI S100 Specification.
Values are for simple span conditions.
Lengths labeled with an "e" required web stiffeners at supports.

Interior Shaftwall

Ceiling Design

Single Span Ceiling (Unbraced)

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Interior Ceiling Spans

Ceiling Design

Single Span Ceiling (Unbraced)

Filter Results

Limiting Ceiling Span

Stud Web Width

Stud Thickness

Stud Spacing

Lateral Load

Deflection

28 Ceiling Systems Shown

162PDS125-15-50ksi-P

Ceiling Design

SpacingL/120L/240L/360127'-3" 7'-3" 6'-10" 166'-8" 6'-8" 6'-3" 245'-11" 5'-11" 5'-5"

162PDS125-18-70ksi-P

Ceiling Design

SpacingL/120L/240L/36012-7'-10" 7'-4" 16-7'-3" 6'-8" 24-6'-6" 5'-10"

162PDS125-30-33ksi-P

Ceiling Design

SpacingL/120L/240L/360129'-4" 9'-4" 8'-7" 168'-7" 8'-7" 7'-10" 247'-8" 7'-8" 6'-10"

162PDS125-33-33ksi-P

Ceiling Design

SpacingL/120L/240L/360129'-9" 9'-9" 9'-0" 169'-0" 9'-0" 8'-2" 248'-0" 8'-0" 7'-2"

250PDS125-15-50ksi-P

Ceiling Design

SpacingL/120L/240L/360128'-4" 8'-4" 8'-4" 167'-8" 7'-8" 7'-8" 246'-11" 6'-11" 6'-11"

250PDS125-18-70ksi-P

Ceiling Design

SpacingL/120L/240L/36012-9'-0" 9'-0" 16-8'-5" 8'-5" 24-7'-7" 7'-7"

250PDS125-30-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601210'-4" 10'-4" 10'-4" 169'-7" 9'-7" 9'-7" 248'-6" 8'-6" 8'-6"

250PDS125-33-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601210'-9" 10'-9" 10'-9" 169'-11" 9'-11" 9'-11" 248'-10" 8'-10" 8'-10"

350PDS125-15-50ksi-P

Ceiling Design

SpacingL/120L/240L/360129'-1" 9'-1" 9'-1" 168'-5" 8'-5" 8'-5" 247'-6" 7'-6" 7'-6"

350PDS125-18-70ksi-P

Ceiling Design

SpacingL/120L/240L/36012-9'-10" 9'-10" 16-9'-1" 9'-1" 24-8'-2" 8'-2"

350PDS125-30-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601211'-2" 11'-2" 11'-2" 1610'-4" 10'-4" 10'-4" 249'-3" 9'-3" 9'-3"

350PDS125-33-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601211'-7" 11'-7" 11'-7" 1610'-8" 10'-8" 10'-8" 249'-7" 9'-7" 9'-7"

362PDS125-15-50ksi-P

Ceiling Design

SpacingL/120L/240L/360129'-2" 9'-2" 9'-2" 168'-6" 8'-6" 8'-6" 247'-7" 7'-7" 7'-7"

362PDS125-18-70ksi-P

Ceiling Design

SpacingL/120L/240L/36012-9'-11" 9'-11" 16-9'-2" 9'-2" 24-8'-3" 8'-3"

362PDS125-30-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601211'-3" 11'-3" 11'-3" 1610'-5" 10'-5" 10'-5" 249'-4" 9'-4" 9'-4"

362PDS125-33-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601211'-8" 11'-8" 11'-8" 1610'-9" 10'-9" 10'-9" 249'-8" 9'-8" 9'-8"

400PDS125-15-50ksi-P

Ceiling Design

SpacingL/120L/240L/360129'-5" 9'-5" 9'-5" 168'-9" 8'-9" 8'-9" 247'-10" 7'-10" 7'-10"

400PDS125-18-70ksi-P

Ceiling Design

SpacingL/120L/240L/36012-10'-2" 10'-2" 16-9'-5" 9'-5" 24-8'-6" 8'-6"

400PDS125-30-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601211'-7" 11'-7" 11'-7" 1610'-9" 10'-9" 10'-9" 249'-8" 9'-8" 9'-8"

400PDS125-33-33ksi-P

Ceiling Design

SpacingL/120L/240L/3601212'-0" 12'-0" 12'-0" 1611'-1" 11'-1" 11'-1" 249'-11" 9'-11" 9'-11"

550PDS125-15-50ksi-P

Ceiling Design

SpacingL/120L/240L/36012-10'-5" 10'-5" 16-9'-8" 9'-8" 24-8'-8" 8'-8"

550PDS125-18-70ksi-P

Spacing L/120 L/240 L/360
12 7'-3" 7'-3" 6'-10"
16 6'-8" 6'-8" 6'-3"
24 5'-11" 5'-11" 5'-5"

Spacing L/120 L/240 L/360
12 - 7'-10" 7'-4"
16 - 7'-3" 6'-8"
24 - 6'-6" 5'-10"

Spacing L/120 L/240 L/360
12 9'-4" 9'-4" 8'-7"
16 8'-7" 8'-7" 7'-10"
24 7'-8" 7'-8" 6'-10"

Spacing L/120 L/240 L/360
12 9'-9" 9'-9" 9'-0"
16 9'-0" 9'-0" 8'-2"
24 8'-0" 8'-0" 7'-2"

Spacing L/120 L/240 L/360
12 8'-4" 8'-4" 8'-4"
16 7'-8" 7'-8" 7'-8"
24 6'-11" 6'-11" 6'-11"

Spacing L/120 L/240 L/360
12 - 9'-0" 9'-0"
16 - 8'-5" 8'-5"
24 - 7'-7" 7'-7"

Spacing L/120 L/240 L/360
12 10'-4" 10'-4" 10'-4"
16 9'-7" 9'-7" 9'-7"
24 8'-6" 8'-6" 8'-6"

Spacing L/120 L/240 L/360
12 10'-9" 10'-9" 10'-9"
16 9'-11" 9'-11" 9'-11"
24 8'-10" 8'-10" 8'-10"

Spacing L/120 L/240 L/360
12 9'-1" 9'-1" 9'-1"
16 8'-5" 8'-5" 8'-5"
24 7'-6" 7'-6" 7'-6"

Spacing L/120 L/240 L/360
12 - 9'-10" 9'-10"
16 - 9'-1" 9'-1"
24 - 8'-2" 8'-2"

Spacing L/120 L/240 L/360
12 11'-2" 11'-2" 11'-2"
16 10'-4" 10'-4" 10'-4"
24 9'-3" 9'-3" 9'-3"

Spacing L/120 L/240 L/360
12 11'-7" 11'-7" 11'-7"
16 10'-8" 10'-8" 10'-8"
24 9'-7" 9'-7" 9'-7"

Spacing L/120 L/240 L/360
12 9'-2" 9'-2" 9'-2"
16 8'-6" 8'-6" 8'-6"
24 7'-7" 7'-7" 7'-7"

Spacing L/120 L/240 L/360
12 - 9'-11" 9'-11"
16 - 9'-2" 9'-2"
24 - 8'-3" 8'-3"

Spacing L/120 L/240 L/360
12 11'-3" 11'-3" 11'-3"
16 10'-5" 10'-5" 10'-5"
24 9'-4" 9'-4" 9'-4"

Spacing L/120 L/240 L/360
12 11'-8" 11'-8" 11'-8"
16 10'-9" 10'-9" 10'-9"
24 9'-8" 9'-8" 9'-8"

Spacing L/120 L/240 L/360
12 9'-5" 9'-5" 9'-5"
16 8'-9" 8'-9" 8'-9"
24 7'-10" 7'-10" 7'-10"

Spacing L/120 L/240 L/360
12 - 10'-2" 10'-2"
16 - 9'-5" 9'-5"
24 - 8'-6" 8'-6"

Spacing L/120 L/240 L/360
12 11'-7" 11'-7" 11'-7"
16 10'-9" 10'-9" 10'-9"
24 9'-8" 9'-8" 9'-8"

Spacing L/120 L/240 L/360
12 12'-0" 12'-0" 12'-0"
16 11'-1" 11'-1" 11'-1"
24 9'-11" 9'-11" 9'-11"

Spacing L/120 L/240 L/360
12 - 10'-5" 10'-5"
16 - 9'-8" 9'-8"
24 - 8'-8" 8'-8"

Spacing L/120 L/240 L/360
12 - 11'-6" e 11'-6" e
16 - 10'-7" e 10'-7" e
24 - 9'-6" e 9'-6" e

Spacing L/120 L/240 L/360
12 12'-10" 12'-10" 12'-10"
16 11'-10" 11'-10" 11'-10"
24 10'-8" 10'-8" 10'-8"

Spacing L/120 L/240 L/360
12 13'-3" 13'-3" 13'-3"
16 12'-3" 12'-3" 12'-3"
24 11'-0" 11'-0" 11'-0"

Spacing L/120 L/240 L/360
12 - 10'-8" 10'-8"
16 - 9'-10" 9'-10"
24 - 8'-10" 8'-10"

Spacing L/120 L/240 L/360
12 - 11'-10" 11'-10"
16 - 10'-11" 10'-11"
24 - 9'-10" 9'-10"

Spacing L/120 L/240 L/360
12 13'-1" 13'-1" 13'-1"
16 12'-2" 12'-2" 12'-2"
24 10'-11" 10'-11" 10'-11"

Spacing L/120 L/240 L/360
12 13'-6" 13'-6" 13'-6"
16 12'-6" 12'-6" 12'-6"
24 11'-3" 11'-3" 11'-3"