Historic Preservation Commission Agenda and Packet 2011 11 21

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down to the ceiling joists over the central bearingwall. Note that the capacity of the load path from the new wall through the first floor and basement bearing lines to the foundation would first need to be determined. Preliminary observations indicate that the existing bearing line is suitable to support this new cripple wall, although selective strengthening of the Basement level header beams should be expected. 3. Support the rafters at mid-span with diagonal web members or sister the rafters with engineered lumber. 4. Until repairs are performed, potential failures of portions of the roof framing could occur if overloaded by snow or wind pressure. It is therefore recommended that the roof framing be temporarily shored or that roof strengthening repairs be performed as soon as possible. Snow exceeding 4 inches in depth should immediately be removed from the roof. Snow removal should be performed from ladders or a lift so that workers are not on the roof concurrently with snow. “Further development of repair solutions is necessary to reliably estimate repair costs and those costs should be estimated by a contractor experienced with this kind of work. Similar repairs should also be considered over the Porch, since those rafters are also not compliant with Code. “Over the two smaller west portions of the house, the roof framing appears to be functioning well without any signs of distress or deterioration. No repairs appear to be necessary although a more thorough investigation may reveal other deficiencies.” CONTRACTOR REVIEW: The Planning Division and the Chief Building Official (CBO) contacted and met on site with three (3) qualified contractors to discuss the HSA findings. Each contractor commented on the extent of the project and stated the structural engineer has provided a great level of detail on the drawings. At the time of the writing of this report, two of the three contactors submitted bids. It is anticipated the third contractor will submit a bid which staff will provide at the HPC meeting. One contractor provided a bid on a design he believes will work outside of the structural engineer’s request. Copies of the bids are attached and following is a summary outline of the bids. Raimo Construction, Inc. Raimo Construction provided a bid package based only on the engineering drawings without checking any of the existing conditions. Due to unfortunate timing, Raimo Construction was unable to visit the structure. Scope: A. Foundation work per plans $11,850 Cut and remove concrete slab Pour seven concrete piers B. Alterations to Main Roof per plans $27,675 Remove cedar shakes and asphalt shingles Remove sheathing Install new roof shingle Disposal of all construction debris C. Alterations to front and rear lower roof areas per plans $12,150 Remove cedar shakes and asphalt shingles 3