440 



Popular Sciejirc Monthly 



Above (Fig. 4"l, is shown the general guy plan. At left (Fig. 5), is the method of joining 

 pipe sections and attaching upper guys. A good joint is made by butting the ends to- 

 gether and bolting through a sleeve consisting of a 2-foot length of pipe just large enough 

 to slip on. The design as shown is flexible and additional sections of pipe may be added, 

 if desired. At center (Fig. 6), is a view of the base block to hold pipe. At right 

 (Fig. 7) is a side view of wood pole, showing platform and iron loop 



ing. Details of the iron collar are 

 shown in Fig 3. This should be made 

 of i?8-inch by 2-inch strap iron. It has 

 a loop securely riveted on it, made of 

 the same material, of such dimensions 

 as to pass a pipe 2 inches in outside di- 

 ameter, hasten this collar securely to 

 the top of the timber with lag screws. It 

 is also to be drilled for securing the guy 

 cables. 



The platform on the mast is 2 feet 

 square, supprjrted on two pieces of 2-inch 

 by 6-incii, boltetl to the timber; the 

 details are clearly shown in Figs. 2 and 3 

 oi the illustration. 



Note that a sjxice ()-iii< li by 6-inch 

 is providetl alongside the timber and 

 between the two supports. Standard 

 I)ole steps are provided and the wooil- 

 work is given two coats of mineral red 

 paint, and lhe|)ortion to go muk-rground 

 is ])r<fcr,ii)ly t.irred. i'lu' pole is then 

 raised in the cxc.uation bi'forch.md pro- 

 vided, it should be securiK' gu\i<l by 

 three 7-strand 'JK-i'ieii cables adixed to 

 the injn collar, and trued up by means 

 of tuni-jjuckles. 



We are now ready to proceeii witii the 

 erection of the pipe, which is composed of 

 20-foot lengths of standard i '4-inch 

 galvanized well-pipe. Black jiipe of the 

 same size, if given two coats of aluminum 

 paint, will be found very satisf.ictory 

 for the purpose. 



Do not use pipe unions Ijetween joints, 

 as they are not strong enough. .•X good 

 joint may be made, as in F"ig. 5, by but- 

 ting the ends together and bolting 

 through a sleeve consisting of a 2-loot 

 length of pipe just large enough to 

 slip on. 



Erect ill <i llic Pipe 



F.rection is accomplishetl as iollows: 

 The top piece of pipe is inserted through 

 the ft b\' ft opening in the platform sup- 

 ports, and through the loop in the iron 

 collar, and temporarily suspeiideti so the 

 toji is just a few inches above the 

 collar. 



.Aeii.il pulle\ .uul rope are fastened 

 with an e\'e-biilt through the end of llie 

 |)ipe, and the top set of three g>d\ani/ed 

 No. 12 gage iron wires secured around 



