24D-317 RHR Repair 2Technical Specifications for:
Reinforcement of Existing 1 Floor Beamsst
127-163 Round Hill Road
Northampton, MA
December 19, 2008
Ryan S. Hellwig, PE
Structural Engineer
28 Aldrich Street
Northampton, MA
413 - 584 - 4594
GENERAL
1)All Structural Work shall conform to the MSBC (Massachusetts State Building Code - 780
CMR), Sixth Edition.
2)Dimensions and elevations of existing construction given in structural drawings are based
on limited field observations and measurements. The contractor shall verify all information
pertaining to existing conditions by actual measurement and observation at the site. All
discrepancies between actual conditions and those shown in the drawings shall be reported to the
Engineer for his evaluation before the affected construction is put in place.
3)Design Criteria:
Floor Live Load:40 psf - Residential
Soil Bearing:3000 psf - Allowable Pressure
CONCRETE
1)Footing concrete may be unreinforced and shall meet or exceed the following requirements:
c28-day compressive strength f' = 2500 psi, minimum
Water/Cement ratio = 0.5, maximum
Slump = 5" maximum
WOOD
1)Dimension Lumber of 2 inch nominal thickness shall be Spruce-Pine-Fir Stud Grade per The
National Lumber Grades Authority (NLGA) and shall have the following minimum design values:
E = 1,400,000 psi
bF = 875 psi (unadjusted)
2)Dimension Lumber of 2 inch nominal thickness in contact with concrete slab shall be
Southern Pine #2 or better per The Southern Pine Inspection Bureau - SPIB and shall be preservative
pressure-treated to the requirements of the American Wood Preservers Association (AWPA) with
the following minimum design values:
E = 1,600,000 psi Modulus of Elasticity
bF = 1250 Bending Stress
3)Sheathing panels to be classified with Exterior Durability Exposure, and to be made w/
waterproof glues; Veneer grade to be D or better. Panels to conform to one of the following:
a)APA Voluntary Product Standard PS1 for Construction and Industrial Plywood.
b)APA Voluntary Product Standard PS2 for Wood-Based Structural Use Panels.
4)Nailing for sheathing panels shall be as specified in the MSBC Table 2305.2