Energy Code Ace - JA4.5 Miscellaneous Construction

JA4.5 - Miscellaneous Construction

Table 4.5.1 – Doors

Description	U-factor (Btu/ºF-ft²)
Uninsulated single-layer metal swinging doors or non-swinging doors , including single-layer uninsulated access hatches and uninsulated smoke vents:	1.45
Uninsulated double-layer metal swinging doors or non-swinging doors , including double-layer uninsulated access hatches and uninsulated smoke vents:	0.70
Insulated metal swinging doors , including fire-rated doors , insulated access hatches, and insulated smoke vents:	0.50
Wood doors , minimum nominal thickness of 1-3/4 in. (44 mm), including panel doors with minimum panel thickness of 1-1/8 in. (28 mm), and solid core flush doors , and hollow core flush doors :	0.50
Any other wood door :	0.60
Uninsulated single layer metal roll up doors including fire rated door	1.45
Insulated single layer metal sectional doors, minimum insulation nominal thickness of 1-3/8 inch; expanded polystyrene (R-4 per inch).	0.179

Source: ASHRAE 90.1-2007, Section A7.

Table 4.5.2 – Physical Properties of Materials

Code	Description	R-value	Thickness	Conductivity	Density	Specific Heat
AR02	Asphalt Shingle & Siding	0.44	NA	NA	70.0	0.35
BP01	Building Paper, Permeable Felt	0.06	NA	NA	NA	NA
PW03	Plywood 1/2 in.	0.63	0.0417	0.0667	34.0	0.29
GP01	Gypsum Board 1/2 in.	0.45	0.0417	0.0926	50.0	0.26
BR01	Built-up Roofing 3/8 in.	0.33	0.0313	0.0939	70.0	0.35
PW05	Plywood 3/4 in.	0.94	0.0625	0.0667	34.0	0.29
PW04	Plywood 5/8 in.	0.78	0.0521	0.0667	34.0	0.29
CP01	Carpet with Fibrous Pad	2.08	NA	NA	NA	0.34
PB01	Particle Board Low Density 3/4 in.	1.39	0.0625	0.0450	75.0	0.31
SC01	Stucco 1 in.	0.20	0.0833	0.4167	116.0	0.20
WD05	Wood, Soft 4 in.	5.00	0.3333	0.0667	32.0	0.33
WD11	Wood, Hard 3/4 in.	0.68	0.0625	0.0916	45.0	0.30
-CC03	Heavy Wt. Dried Aggregate 4 in.	0.44	0.3333	0.7576	140.0	0.20
CC14	Heavy Wt. Undried Aggregate 4 in.	0.32	0.3333	1.0417	140.0	0.20
AC02	1/2 in. Acoustic Tile	1.26	0.0417	0.0330	18.0	0.32
AL33	Air Layer 4 in. or more, Horizontal Roof	0.92	1.0000	0.4167	120.0	0.20
CP01	Carpet with Fibrous Pad	2.08	NA	NA	NA	0.34

Table 4.5.2 – Physical Properties of Materials (Continued)

Table 4.5.3 – Rules for Calculating Mass Thermal Properties From Published Values

Property	Units	Rule for Calculation
Heat Capacity (HC)	Btu/ºF-ft²	From Table 4.3.5, Table 4.3.6, or Table 4.3.7
U-factor	Btu/h-ºF-ft²	From Table 4.3.5, Table 4.3.6, or Table 4.14
C-factor	Btu/h-ºF-ft²	From Table 4.3.5, Table 4.3.6, or Table 4.3.7
Thickness (T)	Ft	From Table 4.3.5, Table 4.3.6, or Table 4.3.7
Specific Heat (SH)	Btu/ºF-lb	Assume that the specific heat of all concrete and masonry materials is 0.20 Btu/ºF-lb and that the specific heat of wood or straw (see Table 4.3.11 and Table 4.3.12) is 0.39 Btu/ºF-lb.
Weight (W)	lb/ft²	Divide the HC by the assumed specific heat. Wall weight is used with the low-rise residential standards to define a high mass wall.
Density (D)	lb/ft³	Multiply the weight (as calculated above) by the thickness (T)
Conductivity (C)	Btu/h-ºF-ft	Divide the published C-factor by the thickness (T). When only a U-factor is published, calculate the C-factor by assuming an exterior air film of 0.17 and an interior air film of 0.68.