CONSTRUCTION DETAILS 



FIGURE 1 



Section through firebox lined with 4'/2 inches of 

 fire-clay brick at sides and 2'/2 inches of fire-clay 

 brick on hearth. The grate is chained. 



FIGURE 2 



Section through firebox, with 21/2 inches of 

 fire-clay brick side lining and hearth. The grate 

 is hinged. (For hinge detail, see fig. 3.) 



FIGURE 3 



Grate hinge detail. The grate frame is ex- 

 tended at hinge side as shown the ends being 

 welded together. The extended portions have a 

 S/g-inch diameter hole for passage of hinge rod. 

 The '/2-irich diameter hinge rod is held in 3/^-inch 

 pipe sleeves built into the masonry. 



FIGURE 4 



A further development of the grate hinge shown 

 in figure 3. Here a solid plate is hinged on to 

 the same hinge rod carrying the grate. The solid 

 plate may be thrown back independently of the 

 grate; or both plate and grate may be thrown 

 open, converting the fireplace into a warming 

 reflector. In this detail, the hinge bars are two 



separate bent sections, with flattened ends, built 

 into the chimney (also see pi. X). 



FIGURE 5 



Detail of built-in grate bars. The bars are let 

 into pipe sleeves, allowing for expansion. They 

 may or may not be arranged in such a way that 

 removal and replacement can be taken care of 

 in case of damage. 



In plan B, the bolts near either end of the rod 

 are removed. The rod is slipped back into one 

 sleeve pocket, freeing the other end for com- 

 plete removal. 



In plan C, one or both ends of the rod, to- 

 gether with its pipe sleeve fitting, pass com- 

 pletely through the side walls of the fireplace, 

 with bolts as shown, for securing the rod in place. 



FIGURE 6 



Eye bolt chain anchor. 



FIGURE 7 



Pin chain anchor. 



In addition to types shown, the end of the 

 chain may be spiked to a post, or log deadman 

 sunk into the ground. 



74 



