Optimize the use of framing materials.
1.1 Framing order waste factor limit. Limit the overall estimated waste factor to 10% or less. If the waste factor on any portion of the framing order exceeds 10%, calculate the overall waste factor as shown in Table 22.
Waste factor is defined as the percentage of framing material ordered in excess of the estimated material needed for construction.
|Table 22. Sample Framing Order Waste Factor Calculation|
|Framing component||Total cost||Waste factor||Waste cost|
|Beams and headers||$500||20%||$100|
|Overall waste factor (waste $/ cost $)||8.3%|
1.2 Detailed framing documents (1 point). Prior to construction, create detailed framing plans or scopes of work and accompanying architectural details for use on the job site. Indicate the specific locations, spacing, and sizes of all framing members in the floors, walls, roof, and ceiling (if different from the roof).
1.3 Detailed cut list and lumber order (1 point). The requirements in MR 1.2 must be met to earn this credit. Prior to construction, create a detailed cut list and lumber order that corresponds directly to the framing plans and/or scopes of work.
1.4 Framing efficiencies (maximum 3 points). Implement measures from Table 23.
1.5 Off-site fabrication (4 points). Use either of the following alternatives to on-site framing:
a) Panelized construction. Wall, roof, and floor components are delivered to the job site preframed.
b) Modular, prefabricated construction. All principal building sections are delivered to the job site as prefabricated modules.
|Table 23. Efficient framing measures|
|Precut framing packages||1.0|
|Open-web floor trusses||1.0|
|Structural insulated panel (SIP) walls||1.0|
|Stud spacing greater than 16" o.c.||1.0|
|Ceiling joist spacing greater than 16" o.c.||0.5|
|Floor joist spacing greater than 16" o.c.||0.5|
|Roof rafter spacing greater than 16" o.c.||0.5|
|Implement any 2 of the following:
Note: Alternative measures not listed in Table 23 may be eligible to earn points if they save comparable amounts of framing material. A formal credit interpretation request with full justification of any alternative measure’s potential savings must be submitted by the Provider to USGBC.