1925 (#1403-1607) - Laserfiche WebLink

Home Browse Search

The ~nperlntendent of Streets shall select at random for testing purposes, one length of vlw for es~h ~o hundr~ (~) feet, or fracti~ ther~f, of ~ch s~e of pi~ to ~ laid, ~e minimum nm~r of spectrums to ~ tested shall ~ ~ix (6) for each sele~ion 0f e~h ske of pi~ ~. ~ select~ for'testln~ purposes shall ~ delivered by the ~ntractor for ~e ~e numar of pi~ to ~ tested for the 5and Bearing Crushing Test ~nd the Hydro- s~fic Pressure Test shall be at least three (3) for each of these tests and for s~ecg~ of each s~e of pi~. ~ever the len~h o{ each size of pipe to ~ lald is more than ~elve hundr~ (~) feet, that numar of pi~ which most closely represents fif~-one (51) ~r cent · e sp~ime~ shall ~ tested for crushin~ stren~h lad ~e remainder of ~e s~clm~s Sh~ll ~ test~ for hydros~tic ~essure. The n~r of pipes to be tested for absorption shall ~ ~e same n~r ~s are t~ted for c~shlng stre~h, and the pi~s to ~ used for the absorpti~ test sh~ll sel~ted from ~ose pipes which have met the r~uirements of ~e crashing tes~ In ~klng any ~e of ~e ~ree (3) tests a~ve mentionS, ~e n~r of pi~s to test~ in ~e s~ond ~leaion of pipes, as hereinafter specified, shall ~ five (5) {or ~ pi~ that {~il~ to ~t the requirements of ~e first sel~ti~. If in making ~y one of the three (3) tests abo~e mentioned, ei~ty (~) ~r c~t or more of the s~imens tested meet the r~uirements imposed ~ that test, all of the in ~e shi~ent or delivery corres~nding to ~e s~es so test~ shall ~ considered as ~pl~ng with ~at tesL Unless o~e~ise sp~ified herein, the specimens of pipe shall be s~nd pipe havi~ d~slons ~sist~t wi~ ~ese sp~ificatlons, whi~ pipe shall, ~fore ~sting, ~ freed from all visible moisture, ~d when so fr~ from moisture, e~ch specimen shall ~ me~- ~ ~d ins~t~ ~d ~e results of these observati~ shall be recorded by the Su~r- in~d~t of Struts. (1) S~D B~ING CRUSHING TEST. The l~d shall ~ applied at a aifo~ r~te of ab~t two thousand (~) pounds ~r minute, or in increments of no~ ~re ~ one hundred (1~) ponds, at ~e same ~te. The pi~ shall n~ ~ allowed to s~d ~der ~e l~d lo~er th~ is r~ulr~ to ~ly ~e l~d ~d to obse~e and re.rd ic The tes6~ ~e shall ~ subst~tial ~d rigid ~rou~hou~ ~ ~t ~ ~stri- ~tion of ~e Io~d will not ~ afl.ted by ~e deformation or ~elding of ~ny ~ The ~ar~s and ~e s~cimens shill ~ ac~rately centered so as to s~e ~ ~i~l distribution of the loadin~ on each side of the c~ter of ~e pi~ in ~ di~i~ The pi~ to ~ test~ shall ~ carefully ~dded a~ve and ~low in s~d, for f~rt (~) of ~e circ~ierence of ~e pipe measured on ~e middle li~ of ~e shell. ~e d~ of ~ddin~ i~ve and ~Iow ~e ~ at the th~est ~ints s~ll ~ o~-h~lf (~) of ~e ~us of ~e middle line of the shell. ~ ~ used shall ~ clean, and s~ll be such as will pass a No. 4 ~ ~ top ~ring fr~e sh~l not ~ allow~ ~ c~e in ~a with ~e pi~ wi~ ~ t~ ~sr~ ~at~ The u~r surface of ~e s~d in ~e t~ ~sri~ shall s~ l~el wi~ a s~t ~ and shlB ~ covered wi~ a ri~d t~ ~ar~g plate, ~e I~ of ~h pla~ s~ll ~ ~e t~ le~ of ~e pi~. ~d t~ width of which plate s~l~ l~s~ ~ ~ ~ ~ inside wi~ ~ ~ ~ ~ I