Tsis muaj tus nqi ruaj khov rau qhov sib nrug ntawm cov ncej guardrail. Nws raug txiav txim raws li txoj kev sib tsoo theem, qib ntawm kev phom sij, thiab cov duab kos tshwj xeeb. Hauv kev siv engineering, ob qho tib si hauv qab no feem ntau yog siv:
1. Standard Spacing: 4 meters Nyob rau hauv dav txoj kev seem los yog seem uas zoo tib yam kev xav tau kev tiv thaiv, posts feem ntau yog spaced 4 meters sib nrug. Qhov sib nrug no ua tau raws li qhov yuav tsum tau muaj kev tiv thaiv yooj yim thaum tseem xav txog cov nqi nyiaj txiag.
2. Kev Sib Txuas Ntxiv: 2 meters Hauv qhov siab - tej thaj chaw muaj kev pheej hmoo xws li cov kab nkhaus, txuas hniav, cov roob txaus ntshai, kev sib tshuam, lossis cov kab nruab nrab, qhov kev ncua deb tau nce mus rau 2 meters txhawm rau txhim kho lub guardrail lub zog thiab kev sib tsoo. Ntxiv ib qho kev tshaj tawm nyob rau hauv nruab nrab ntawm tus qauv 4-meter guardrail vaj huam sib luag tau txhim kho lub guardrail lub peev xwm los nqus kev sib tsoo zog.
Tsis tas li ntawd, rau qee qhov tshwj xeeb lossis siab heev - cov kev pheej hmoo ntawm txoj kev, qhov yuav tsum tau muaj qhov sib txawv txawm tias nruj dua:
1-meter nrug: Hauv qee qhov nruab nrab ntawm cov kab thaiv kab thaiv uas siv lub tes tsho pre-embedded installation lossis cov qib tshwj xeeb (xws li qib SBm), qhov kev ncua deb yuav raug teem rau 1 meter.
1.5-meter qhov sib nrug: Hauv txoj kev loj loj guardrails nrog qhov siab tshaj plaws kev tiv thaiv kev ntsuas (xws li SA qib), qhov kev ncua deb yuav raug teem rau ntawm 1.5 meters.
Cov ntsiab lus: Qhov kev ncua deb ntawm txoj kev feem ntau yog 4 meters, thaum nyob rau hauv txoj kev txaus ntshai yuav tsum tau txhim kho kev tiv thaiv, qhov sib nrug yuav nce mus rau 2 meters. Qhov tshwj xeeb qhov sib txawv yuav tsum tau ua nruj me ntsis raws li cov qauv kev kos duab thiab cov qauv kev cuam tshuam ntawm txoj kev.