LCI Preconstruction & Estimating Training Manual

Floor To Skin Ratio Analysis (By Type) - Including Substructure Framing/Backup

Floor Area Quantity

Skin Area Quantity

Description

Unit Perimeter Unit

Flr / Deck Height

Unit

Flr. Area to Skin Area Ratio

1st Floor 2nd Floor 3rd Floor 4th Floor 5th Floor 6th Floor 7th Floor 8th Floor 9th Floor 10th Floor 11th Floor 12th Floor 13th Floor

22,861 23,332 23,306 22,440 22,440 22,440 22,440 22,440 22,440 22,440 11,908 15,489 10,848

SF SF SF SF SF SF SF SF SF SF SF SF SF

751 722 716 730 730 730 730 730 730 730 496 571 498

LF LF LF LF LF LF LF LF LF LF LF LF LF

17.33 11.33 13.33 13.33 13.33 13.33 13.33 13.33 13.33 17.33 15.00 13.00 18.00

13,017

SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF SF

8,183 9,547 9,733 9,733 9,733 9,733 9,733 9,733

12,653

7,440 7,423 8,964 2,023 9,297

Aluminum Sill Extension

Face Brick Returns

Limestone Accent Returns Granite Veneer Returns Metal Panel Column Cladding

81

116

1,536

Metal Panel Soffits

441

EIFS Soffits

6,681 3,331

13th Floor Curtain Wall Screen Around Mechanical Equipment

Total

264,824

SF

8,864 LF

185.33

Total SF of Skin

Average Floor to Skin Ratio

*

149,133 SF

0.56

Description

Sq.FT

Ratio

Cost Per Sq.FT

Total Cost

Average Cost Per Sq.FT/Skin

Curtain Wall - STC 32 Curtain Wall - STC 34/35

20,018 SF 8,457 SF 14,469 SF 5,357 SF 19,940 SF 6,856 SF

13.42%

$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

80.00 90.00 80.00 82.00 85.00 88.00

$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

1,601,440

5.67% 9.70% 3.59%

761,130

Glazed Windows - Standard 1" IGU - STC 32

1,157,520

Glazed Windows - Standard 1" IGU with Opaque Film - STC 32 Glazed Windows - Unbalanced lite or sgl laminated - STC 34/35

439,274

13.37%

1,694,900

Glazed Windows - Dbl laminated - STC 39

4.60% 0.56% 1.36%

603,328 174,720 606,900

Sliding Nana Wall System Aluminum Sill Extension

832 SF

210.00 300.00

2,023 SF

Masonry Face Brick (concrete substrate)

37,583 SF 9,297 SF 3,025 SF

25.20%

45.75 45.75

1,719,422

Face Brick Returns Brick Accent Wall

6.23% 2.03% 0.52% 0.10% 0.05% 0.13% 0.08% 2.51% 0.53% 0.82%

425,338 399,300 49,725

132.00

Limestone cap

780 SF 142 SF

63.75 44.75 44.75 99.75 99.75 25.00 70.75 60.94

Limestone Accent

6,355 3,625

Limestone Accent Returns

81 SF

Granite Veneer

196 SF 116 SF

19,551 11,571 93,725 56,246 74,773

Granite Veneer Returns

CMU

3,749 SF

Face Brick (CMU substrate)

795 SF

Face Brick (metal stud substrate)

1,227 SF

Steel and Metal Painted C-Channel Steel

690 SF 509 SF

0.46% 0.34%

$ $

164.00

$ $

113,160 40,720

Metal Louvers

80.00

Metal Panels Metal Panel Column Cladding Metal Panel Wall Assembly

1,536 SF

1.03% 0.21% 0.30%

$ $ $

54.00 83.19 72.52

$ $ $

82,944 26,288 31,981

316 SF 441 SF

Metal Panel Soffits

EIFS EIFS Exterior Wall Assembly

4,017 SF 6,681 SF

2.69% 4.48%

$ $

41.69 23.75

$ $

167,469 158,674

EIFS Soffits

Total

*

$ 10,520,079

$

70.54

149,133 SF

100.0%

Ratio Of Assembly to Skin

Glass

77,952 SF 48,902 SF 3,025 SF 1,003 SF

52.27% 32.79%

Face Brick

Brick Accent Wall

2.03% 0.67% 0.21% 2.51% 0.46% 0.34% 1.54% 7.17%

Limestone

Grantite Veneer Split Face CMU

312 SF

3,749 SF

Painted C-Channel Steel

690 SF 509 SF

Metal Louvers

Metal Panel

2,293 SF 10,698 SF

EIFS

149,133.00 SF

100.00%

Optimal Skin Ratio Per Design - Ratio

0.45 0.56

Percentage increase of exterior skin over optiomal

20.1%

10/31/2016 Return to Table of Contents

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