Calculate the overall transmittance for the roof shown below; does this roof meet Bahrain's regulations, 0.3 W/m².0? What can be done to enhance the performance of this roof?
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- Consider a composite wall that includes an 8-mm-thick hardwood siding, 40-mm by 90-mm hardwood studs on 0.65-m centers with glass fiber insulation (paper faced, 28 kg/m³), and a 12-mm layer of gypsum (vermiculite) wall board. What is the thermal resistance associated with a wall that is 2.5 m high by 6.5 m wide (having 10 studs, each 2.5 m high)? Assume surfaces normal to the x-direction are isothermal. Rtot = P K/W Wood siding Stud Insulation Wall boardA wide-flange WF 24 x 76 steel beam with 1 in. (25.4 mm) of spray-applied cementitious material (British equivalent 610 x 229 x 113 kg/m). The beam has WID 1.03 lb/ft and nowhere does the temperature exceed 1,000 F (538 C) or 811 K. The insulation temperature is to he 750 F while keeping the steel temperature at 538 C. The results obtained from (a) Malhotra's quasi-steady state approach (b) Jeanes' graph (c) Lie's graph are compared. To calculate the fire resistance R for the spray-applied beam, the following data are used:What is the temperature factor, Ct, for a connection with wet in-service conditions at 120° F temperature? Use NDS Table 11.3.4. 0.7 0.5 0.8 1.0
- 10 Red drick- 10 em Ar Cavite- 5 om Pohstrene inuaton 10cm T.-40°C T-24C Contrete Manonry tints-20 on Cement Board i om Ovonum toard- 15 cm High Quality Lates Pint-0s om tivity The wall shown in the figure consists of seven layers arranged in series. The thermal resistances of these layers in (m^2.K)/W are given below: Red Brick = 0.1 Air Cavity = 0.25 Polystyrene insulation 0.35 Concrete Masonry Units 0.2 Cement Plaster = 0.03 Gypsum Board = 0.14 Latex Paint = 0 Take the emissivity of the interior surface as 20%, and calculate: (CILO 1) a, the total thermal resistance (Rth) of the wall accounting for both conduction and convection. b. the heat transfer rate (Q) if the wall area is 20 m^2.A cold-storage warehouse is to be constructed of a number of individual rooms that are maintained at various temperatures. The walls of one room are constructed of 4 inches thick masonry on the outside of 0.5 inches thick plywood on the side. Sandwiched between the masonry and plywood is glass fiber insulation that is 3.5 inches thick. The inside-wall temperature is to be maintained at −10°F and the outside-wall temperature is 70°F. As a first step in sizing the required cooling unit, determine the heat flow the wall on a per-square-foot basis.Draw Roof / Ceiling - 9.5 mm Gib standard plasterboard. - 65 x 35 ceiling battens @400 mm centres. 90 x 45 roof trusses @900mm centres - Fibreglass insulation, 50 mm thick, R-value 0.8 - Assume flat roof, 100 mm stagnant air gap between top of insulation and underside of concrete roof tiles. - Concrete roof tiles – model as flat continuous sheet, 20mm thick, (k~0.55 W.m-1.K-1)
- (BASE ON 100 M LONG) In m3 1. Void Forms (in m) 2. Grade Beam Forms (in m2) 3. Grade Beam concrete (placing | Material) (in m3) This drawing is not to scale 260 x 500 Grade Beam Cutback slope (H:V) 1:1 260 x 150 Void Form 3 Rows 10M Rebar 000 ood 900 190 3 Rows 15M Rebar Existing Grade 50 mm Rigid Insulation (200 deep) 300 dia. Concrete Piles (see plan)Calculate the stresses that will occur in the pipe for the domestic waste water pipe buried at least 2 meters below the ground surface. (Determine the other properties of the pipe and the floor yourself.)4 The precast floor system consists of a 150-mm-thick concrete slab carry its self weight as well a (50mm tiles and mortar) is simply supported on four concrete beams (300*500)mm that, in turn, are supported by two concrete girders (300*600mm), as shown in Fig.4. Determine the dead loads acting on beams and girders. (Densities: Let Yconcrete 24 kN/m² and Y tiles and mortar 20 kN/m³) Concrete Girder 10 E 5 m Concrete floor beam (300*500)mm B F 5 m 5 m D -J23 50 mm tiles and mortar 150 mm Concrete slab H 150 mm Concrete slab + 50 mm tiles €
- Design the reinforced concrete wall shown if fe= 4000psi and fy = 60,000 psi (use ACI-318 code) Vu= 300 k L=12'0" 12' 0"A three-ply asphalt felt and gravel roof over 2-in.-thick insulation board is supported by 18-in-deep precast reinforced concrete beams with 3-ft wide flanges. If the insulation weighs 3 lb/ft2 and the asphalt roofing weighs 5.5 lb/ft2, determine the total dead load, per foot of length, each beam must support.(5) 8" 3#9 12" 44 8" T 17" #3" fá= 3000 psi, Grade 60 steel NWC, &M₁=? Mn