## 4 Engineering Practice  
This paper carries out a test run of the structure in the pilot rebuilding project of a dilapidated area--where a single-story building with a floorage of 96 m\({}^{2}\) and a story height of 3.4 m is designed to withstand earthquakes at an intensity level of seven--of Xhai village of Laoting county, Hebei province. The paper proposes the integrated fly-ash masonry structure with an insulated layer and lightweight steel stem embedded. The requirement for engineering application states that: (1) The recycled-concrete brick masonry structure with lightweight steel stems embedded and an insulating layer sandwiched shall comply with the design and seismic requirement stipulated in the references [18; 19]. (2) The design of ring beams and structural columns conforms to the relevant requirement listed in the reference [19]. (3) Lintels are arranged at structural portals--be it window or door--to avoid the occurrence of being out of plane. The cross section of such lintel attains a height of 100 mm, while the width remains consistent with that of the wall piece. Note that for single-floor houses, enclosed ring beams--with a height and width of 180 mm and 240 mm, respectively--are arranged right beneath the roof board. Four longitudinal Q234 re-bars with a diameter of 12 mm are embedded within the ring beams, while the stirrups applied are Q235 re-bars--6 mm in diameter--arranged with a 200-mm interval in between. (4) In terms of the wall pieces, tie bars with a diameter of 6 mm or more are installed longitudinally, with a 500-mm interval between every piece. The arrangement is made on the premise that a 600-mm-long tie bar is embedded in every piece of the inner and outer wythes. (5) Tie bars are arranged in the building of \begin{table}
\begin{tabular}{c c c c} \hline
**Group No.** & **Specimen No.** & **Energy Consumption E/kN\(\cdot\)mm** & \(\Delta\mathbf{e}\) \\ \hline \multirow{4}{*}{Group One} & FCB1 & 115 & 1.00 \\  & FCB2 & 253 & 2.19 \\  & FCB3 & 3154 & 27.31 \\  & FCB4 & 3858 & 33.42 \\ \hline \multirow{4}{*}{Group Two} & RCB1 & 133 & 1.00 \\  & RCB2 & 337 & 2.53 \\  & RCB3 & 2803 & 21.03 \\  & RCB4 & 5157 & 38.70 \\ \hline \multirow{4}{*}{Group Three} & AFCB1 & 312 & 1.00 \\  & AFCB2 & 818 & 2.62 \\  & AFCB3 & 5474 & 17.53 \\  & AFCB4 & 6189 & 19.82 \\ \hline \multirow{4}{*}{Group Four} & ARCB1 & 417 & 1.00 \\  & ARCB2 & 1141 & 2.73 \\ \cline{1-1}  & ARCB3 & 5241 & 12.57 \\ \cline{1-1}  & ARCB4 & 8351 & 20.02 \\ \hline \end{tabular}
\end{table} 
Table 4: Relative energy consumption measured. the wythes, made of standard-sized bricks-and the fly-ash blocks; therefore, the bars can be vertically embedded and properly sandwiched in between the mortar. The vertical and horizontal intervals of such bars shall not exceed 400 and 800 mm, respectively. In terms of the choice of material, the recycled-concrete bricks-consistent with clay bricks in size-shall display a strength of MU10 or more. The dimensions of the fly-ash masonry blocks are jointly decided by wall thickness and the insulating performance required. The structural columns shall enjoy a no less than C20 concrete strength. With mortar poured in as an adhesive agent, the wythe pieces and the masonry blocks are bound by \(z\)-shaped reinforced steel with a diameter of 4 mm. Please see Figure 10a,b for the arrangement plan of the main structure and Figure 11a-h for the illustration of the construction site. The following can be concluded from the household inquiry: (1) The application of the integrated masonry structure with stem and insulating layers promises a streamlined construction procedure, easily-accessible raw materials and affordable cost of constriction. (2) In the summertime, the room temperature of the cottage--with no air conditioner or fan--is 3-5 \({}^{\circ}\)C lower than that of other houses in the village, meaning that the structure helps reduce electricity costs.