Use Acro's exclusive 12075 Open-edge Guardrail Brackets on rake-edges of any pitch and eave-edges under 4/12 pitch. This innovative full guardrail system is easy to install, move & remove without damaging shingles on any roof 16/12 pitch and under. This allows the guardrails to be put up early in the new construction process or even prior to shingle removal on a tear off; and easily moved without having to take the system down.