By Gil Taylor
As much as Code: Carpentry and Framing Inspection Notes is an on-the-job “cliff notes” source, full of info that would shop time and cash whereas making sure caliber. To-do checklists, charts and tables with at-a-glance calculations, who’s-responsible-for-what information, and diagrams that in actual fact illustrate complex info make it quickly and simple for busy construction execs to do their jobs completely and successfully, and keep away from high priced error. The books aid development professionals determine and meet inspection instructions, and supply consumers with schedules and necessities. all of the as much as Code: Inspection Notes is targeted at the IBC (International development Code), the main greatly followed construction code in North the USA. Carpentry and Framing also will specialize in details from the EWA (Engineered wooden Association), and the foreign power Conservation Code, overseas hearth Code, and ICC functionality Code. every one consultant covers: accountability; Authority; qc and insurance; Plans and requirements; store Drawings; Inspectors day-by-day file; Pre-Construction assembly; apparatus idea; Claims; development Schedules; hard work Enforcement; garage of fabrics; Contractor’s fee; Rights-of-Way; list Drawings; venture Turnover; Inspection records; advised gear; Inspection; security.
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The joist may be set with the 11⁄2-in. knockout holes turned either up or down. SPECIAL CONSIDERATIONS FOR ENGINEERED JOISTS The codes require that the manufacturer’s installation instructions be strictly followed! 44 FLOORS Figure 4-9 NEVER HANG JOIST BY TOP FLANGE OR WEB Figure 4-10 NEVER PLACE BIRD’S-MOUTH CUT IN BOTTOM FLANGE AT HIGH END OF RAFTER 46 47 Spans and Loads Refer to Tables 4-8 and 4-9 for allowable loads for the AJS 20 and AJS 25. The following notes (courtesy of Boise Cascade Corporation) apply to calculations of allowable uniform loads on AJS 20 and AJS 25 engineered joists (Tables 4-8 and 4-9): • Total load values are limited by shear, moment, or total load deflection equal to L/240 (refer to Figure 4-15 on page 55).
Code requires that cantilevered joists have a 3:1 ratio for uplift. For every foot protruding, there must be 3 ft supported. FLOORS 37 All nailing connections must be complete in order to comply with the load capabilities. Refer to Figure 4-4. ENGINEERED JOISTS See Figure 4-5 for an example of minimum permissible hole locations in engineered joists and refer to the next section for further guidelines on cutting and drilling engineered joists. ❏ Check joist lateral supports. • BCI joists must be laterally supported at the ends with hangers, BCI rim joists, rim boards, BCI blocking panels, or xbracing.
Cuts or notches on ledgers must be < 1⁄4 the depth. • Holes should not be made within 2 in. of top or bottom and hole diameter must be < 1⁄3 the depth. • Header joists <4 ft may be a single member. Use a double member if more than 4 ft. • Hangers must be used if header joists are > 6 ft. • Engineered floor trusses cannot be altered! • Sawn beams (4 in. and more) cannot be notched, drilled, or cut except at their ends for a ledger (1⁄4 the depth). • Doubled joists that are separated to allow for piping or vents are to be fully depth blocked by lumber not less than 2 in.