Committee, or SENRAC. Safety Tip: The Steel Erection Negotiated Rulemaking Advisory Committee (SENRAC) was established. by OSHA in 1994 in accordance with the Federal Advisory Committee Act (FACA) to make a. recommendation to OSHA on the contents of a Notice of Proposed Rulemaking. Course Overview.
Gable Roof Costs. The following costs are based on roof installation during new home construction. Changing your existing roof to a gable roof can easily add $5,000 to $10,000 to the project cost. As a VERY general guideline, labor for framing a gable roof costs $8 to $12 per square foot of roof surface. For an average 1,500 square foot roof this works out to $12,000 to $18,000. Multiple gables and dormers can result in prices as high as $25,000.
1 Metal roofing materials cost about $1,000-$2,000 for a single-wide or $1,800-$3,000 for a double-wide, depending on size of unit and manufacturer and are designed to last a lifetime.2  Metal roofs may be installed over an existing roof with or without a DIYer adding insulation in between. Composition shingle roofing is typically added to a pitched roof that repels water better than its flat counterparts and costs about $650-$2,175 for materials for a single-wide or $1,290-$4,250 for a double-wide, depending on size of unit, thickness or quality of shingle and location.