. The Locomotive . a. ; < a 5CL* o z UJu < -I 2D ? O O -5 2 >y/////////////y^^ u K ^ ^ fl «• I: n- ^ 5 ^ S 5 - *. I o r y 2 I * :J U u u 10 o (D I < 2 3« <. 1920.] THE LOCOMOTIVE. 41 above the grates, as illustrated in Figure C. When it is necessary toreplace firebrick this arch supports the brickwork alx)ve and preventsit from falling down. For construction like that shown in TypLS I, II, and IV, wherethe firebrick Hning is only 4^/^ inches thick, headers should be usedfor every fifth course or even more frequently. In all firebrick workthe joints between the bricks should
. The Locomotive . a. ; < a 5CL* o z UJu < -I 2D ? O O -5 2 >y/////////////y^^ u K ^ ^ fl «• I: n- ^ 5 ^ S 5 - *. I o r y 2 I * :J U u u 10 o (D I < 2 3« <. 1920.] THE LOCOMOTIVE. 41 above the grates, as illustrated in Figure C. When it is necessary toreplace firebrick this arch supports the brickwork alx)ve and preventsit from falling down. For construction like that shown in TypLS I, II, and IV, wherethe firebrick Hning is only 4^/^ inches thick, headers should be usedfor every fifth course or even more frequently. In all firebrick workthe joints between the bricks should be made just as thin as this reason a trowel should not be used but the bricks should bedipped in thin fire-clay and then rubbed down into place so as to make brick-to-brick joints. ALLOWANCE FOR EXPANSION AND PREVENTION OF AIR LEAKS. Ample provisions should be made throughout to allow the boilerand the setting to expand without cracking the brickwork or openingup places where air can leak into the setting. If the brickwork isbuilt tight up to the boiler shell at the closing-in line, cracks are sureto develop when the boiler is heated up and there will a
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Keywords: ., bookauth, bookcentury1800, bookdecade1860, bookidlocomotive32hart
