METHOD Of SECURING DECAYED TIMBERS. |23 



The particular irons ufed in this way are fhown in Plate VII. Eafy method of 

 Fig, 4. N is-a collar for the girder ; O, an iron frame which ffC'^'-ing decayed 

 refts on the templet; PP, two nuis which raife the collar N. [ngs'^&i? **"'"' 

 R R (how the clawed ends of the two bars of iron, extending 

 under the girder, bedded therein, and fcrewed to it at their 

 extremities, about five feet diftant from the templet. 



Fig. 5, is one of the iron bars laft mentioned. 



S is the claw or lap which projefls over the collar N. T is 

 the place where it is fcrewed into the girder. 



Fig. 6 and 7. Plate VII. explain a third method of fecuring 

 decayed timbers. 



^^S' ^' gives a fide view of a decayed girder : a, reprefents 

 the templet; b, an iron lever, fix feet long, nearly ftrait, 

 being only cambered one inch, three inches wide, and three 

 quarters of an inch thick ; this lever extends along the fide of 

 the girder c, and is fecured firmly to it by the fide irons dddd, 

 which are two inches wide, and full half an inch thick, point- 

 ed at the ends. The higher ends of thefe fide irons are driven 

 into the girder, and the lower points pafs through holes in the 

 lever into the lower part of the girder, and are held clofe to 

 the girder by ftaplesceee: the fide iron next the templet 

 may be fixed flanling, in order that it may enter founder wood. 

 A claw, /, which is part of the lever, refts on the wall plate 

 a, and is bedded in it ; an iron plate, g, lying under the girder, 

 and let into it, pafies through the lever at /*, connecting it 

 with a fimilar lever on the oppofite fide, and which affifts in 

 the fame way to fupport the girder: i is a flooring joift, to 

 (how how deep the levers are inferted therein. 



Fig. 7, fliows the under part of the fame girder; bb, are 

 the bottoms of the two levers above mentioned, fixed to the 

 girder by the fide irons and ftaples before defcribed; kk, the * 



broad feet of the levers which lie flat upon the wall plate ; //, 

 the two claws projeding from the feet, in order to bed in the 

 wall plate; z i x i are joifts, partly cut through, to admit the 

 iron levers to lie clofe to the girder : g fliows the iron plate or 

 collar on which the girder bears ; it is turned up an inch and a 

 half at each end, to keep the levers clofe to the fides of the 

 girder. This collar fliould be made out of inch-bar iron, with 

 points projecting from it, in tlie fame manner as the collar at 

 DD, Fig. 1, to connedlit with the levers, by pafljng through 

 holes made through them for that purpofe. 



To 



