b'Delta MW and EPS-FR Panel Awning and Patio Roof System (l)Staked chairs2250 kW Peak HRR for 12 chairs (upholstered seat with metal frame) in two stacks as shown in Figure 4-5. (m)Laundry400 kW peak HRR for 10 shirts hanging on a rail; see Figure 4-6. (n)Miscellaneous furnishingstimber desk with a peak HRR of 650 kW; see Figure 4-7. Assuming that the patio contains a three-seater upholstered sofa, 12 upholstered chairs with metal frames in stacks of 6 chairs side by side, a laundry rack with 10 T-shirts and a timber desk approximating a small table; the combined peak HRR (if all fire loads reached their peak HRR simultaneously) is 6200 kW. As the fire is expected to start from a single ignition source and potentially spread to surrounding objects if the fire grows to a large enough size, different objects would be within different stages of fire growth and decay. Assuming that all objects will ignite, grow and peak simultaneously is not a realistic fire scenario. As such, the overall fire size and intensity is likely to be far less than 6200 kW, so this peak HRR is conservative. Due to the uncertainty of potential fire loads that can be placed below the Class 10a awning, a further safety margin of approximately 1.6 is applied to the peak HRR. The design fire is therefore taken as 10 MW. To put this into perspective, this is equivalent to a large passenger vehicle fire. Thus, a design fire with peak HRR of 10 MW provides a worst credible fire scenario for use in the assessment. To eliminate time dependency, a steady state fire at a heat release rate of 10 MW will be used for assessment purposes. Figure 4-4. Peak HRR of upholstered sofas (SFPE handbook 2016). Figure 4-5. HRR of metal frame upholstered chairs (SFPE handbook 2016). Revision 1-425'