一 205 — 
mad ’ 仏 0 l. i 0 rizon t a l part of the aw formed by the inner reinforcing plates may be 
sh 1 ^ 、 V id e as the upper flange of the floor beam. Both putor and inner plates 
ふ ）e long enough to extend u early to the upper edges of the stayplates. 
f ei ，/ GX ^ come the reinforcing plates at the middle of posts. These are placed pre- 
R l〕eci ^ 仙 出 6 inSl (! e 0 f 【he posts, but may be put on the outside if there be any 
tlut 1 f leasou f° r 80 doing. When on the inside tlie thickness should be equal to 
tn fi 、 〇 1 ル 0 We b 。で the cliaimel, but neve i. less than % r \ The width should be equal 
Reptil of the post channel. 
allow f Pl acet l u P 0 u Üie outaide of the post, tlie thickness should be increased to 
( ^ e pth of necessai .ily diminished width. The length should be about twice tlie 
i no i . ie channels， but should in all cases bo great enough to extend two or three 
ぶ ： 11111 m tlie stay plates. 
l) e 如 ac j C01 ， G the bent connecting plates for intermediate struts to posts. These may 
孤 6 0 I X 4 " iron about thirty inches long, 
to in COnn ecUiig plates for brackets to lower portal struts, and for name plates 
X\lii . e \i ^ )01 8 truts may be made of tlie length and thickness used in Chapter 
strnfo 1 10 贫丄她 ， of course, will depend upon the distance apart of tlie portal 
Manuels. 
braces t ^| mens ^ ons the plates on the side braces and for connecting tlie side 
scale of 〇 $ ie 打 001 ’ ^ eams ma y either be scaled from Plate IX., wliicli is drawn to a 
Phfce at ^ üe or ma y be left to tlie judgement of the clrauglitsman. The bent 
The en d ば the side brace should be at least J 7 thick, 
the f orm 10 、 lless が a connecting plate for track stringers over a floor beam, when 
ness a 加 a o a ^st the latter, need be no greater tlian f", and the same thick- 
plates b ; eUe か 1 ’ 'l le connecting plates for stringers to floor beams. Octagonal 
8 honld b s h’i n gers ami beams, used when the former rest upon the latter, 
Ca ^ c ^ mens i 01 is for connecting members between stringers and beams 
c: ed fromtlie P ]ates . 
^icli the ^ a ^ GS 此 01 侃 l iave a thickness equal to that of tlie plates, the joints of 
Tlip f. C ° Vei / aU( ^ they should be a few inches longer than their width. 
Tlr 1 Ü f llslons filling plates need no comment, 
channel to j 10Ua \ a :. ea of an extension plate should be twice as great as that of the 
It is coixip 0 二' 1 し attached, and its width 811011 Id be equal to that of the channel, 
three o r ム が . t wo e< l ua l or nearly equal thickness, one of which should extend 
foot fartlio I11C ^ es helow tlie upper edge of the stay plate, and the other at most a 
The tT* tban the firSt， 
8 hould be 枭" v ;; ess デ outer jaw plates for lateral struts having no vertical pins 
t】 ll .ee t 0 ti U ’ 1G ''kith at least equal to that of tlie channels and tlie length from 
tlie same 0 ^ liall feet. Tlie inner jaw plate is necessarily shorter but usually 
p 0r j, .^ A， ^ : ^ ie tliickuess may be taken as 皆”. 
】】ess of tlie 1 . ^ S ^ 1U ^ S 〜山 vei， ^ ca l l)i ns passing through tlie jaw plates, the tliick- 
7 ” to 9 り • th e 】 む have to be from 旮 " to f and tlie width at the pin hole from 
eugtli required will bo from four to four and a half feet. 
