121 lines
2.1 KiB
Plaintext
121 lines
2.1 KiB
Plaintext
drums, mm; lhe ham ilsell is a duck an lzvcls This
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.5 a bubble lzvel winch ean alae be [med .e any vehicle
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on (inns, and ie ealled lhe Lung Inelmomelem
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(Prmmrllllure qum' m, lassl
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THE "A" FRAME ms is mad! [mm Mo wooden or
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meal legs, lulled or welded firmly legelheeal lhe apex.
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and llxed aboul lwmhnas down the" lznglh by a
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welded on naaled and gluzd New“ A plumb box:
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or weiyu hangs hum a mad at the cvnh? at me apex,
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and a mark ls made on (he ewes—plea a| lhe cord lme,
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The "A" name )5 lhen mvustd, and Anolhu milk
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made where me curd lunches lhe cross-piece 1he
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midvpninl between me two marks ls tha! poml wheee
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me mad hangs when lhe [eel nl lhe name ix: levgl
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(figure 9.»
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In use, a peeson swwels lhe ham: album one 12g, and
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ms m the second leg |o me plaee when lhe (“rd hang
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vulllcnl A peg )5 pm in lempemily, tn )udgz when |n
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plaee lhe n00 leg Many menes ol dram luv: been sex
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m using A frames, ehen made an mespm lmm lumber,
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cord, and a weaghl lm m. plumb bub
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16
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TYPES OF EARTHWORKS
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HANKS
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n )5 (heapu (o mnslrucl a lam lhan le slrp 0r mam
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lhe eanh, ll lhe bank ean be made stable Wheuvu a
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lourrway mm Wheel 01 annn or power shovel can
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be used ha dlsh lhe bank may mu .emam suble al
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gleamslopeslhanasnmghlmma (thaw rmslmlcd
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s Isl-Imp by glvmg n lhe pmme u wnnld aclueve had
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' lumped. Bank: or nus ul mare lhan o m high need
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rattlu|slablhsauon
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Unllke dam walls, culs Yo! roads am no: nnvmally
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mmpaned, nor an lhey neeeesanly have much pmssmv
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an lhem 1h. gma|es| eanee er slump .s waler (low
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lhmugh or over henae and me liz el mala m shaly
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FlllllIlE 1.!
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ms A—mME LEVEL
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mm 2 men Ilusarl mama mllmnlumh lunccms'lvwf mm
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encmmeam uaea Inveemnnem laywl mmmuszm: amnm
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am «we a: new me
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suzww
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anwa mu.
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'CLIFF'
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'09!” m Sum;
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(wwfwm my
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one
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(14x5 an meme)
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m mei new
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«mi mate-.5
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“mini m
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ESSENHALS ur WHEN Ann sell SLUMPCOMRGL
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MAM memnasun a: male plavenulumnlmm :ulsiwvluwim
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nvlnifls veumllnn news allmuesvsvms
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MRED an». nwlnlse
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nsulls ua
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chK-nowu SYS‘IEMS AND STEEP names
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um slalnslnneslnasusl me mownmullul Aullllnlsann mm
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234
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