Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Wood Light Framing
…305 unchanged lines
### Where the code requires fire-retardant-treated wood in concealed combustible spaces, exterior walls, or other locations in IBC Type III and Type V-A construction, fire-retardant-treated lumber conforming to AWPA C20 (interior type) or AWPA C27 (exterior type) shall be furnished.
−### Fire-retardant-treated lumber is a standard off-the-shelf product. The key coordination is that the treatment reduces lumber design values — the treater's published strength-adjustment factors must be applied to the NDS values, and members must not be cut after treatment in a way that exposes untreated wood beyond the treater's allowances. {note}
−
```datasheet
label: Fire-Retardant Treatment Type
…6 unchanged lines
```
+### Fire-retardant-treated lumber is a standard off-the-shelf product. The key coordination is that the treatment reduces lumber design values — the treater's published strength-adjustment factors must be applied to the NDS values, and members must not be cut after treatment in a way that exposes untreated wood beyond the treater's allowances. {note}
+
# Bearing Walls and Studs {toc}
…44 unchanged lines
### Floor joists shall be sized, spaced, and spanned as scheduled on the structural drawings or by the prescriptive span tables (IRC Table R502.3.1) within their limits, for the design live load and the selected species and grade.
−### The residential floor design live load is 40 psf (IBC Table 1607.1); sleeping rooms and certain occupancies use lower or higher values, so confirm the controlling live load before selecting from a span table. Douglas Fir-Larch No. 2 and Southern Pine No. 2 are the common species; both list E = 1,600,000 psi in the NDS Supplement, but their bending values differ, so the span table must match the actual species. {note}
−
−### Joists shall bear not less than 1-1/2 in. on wood or metal and not less than 3 in. on masonry or concrete, except where an engineered hanger or ledger provides bearing.
−
−### Joists framing into a beam, ledger, or header shall be supported by metal joist hangers selected for the joist size and reaction; toe-nailing alone shall not be used to carry a joist reaction.
−
−### See [[sync/hangers-and-supports]] for the metal connector products used at these conditions. {note}
−
```datasheet
label: Floor Joist Live Load
…18 unchanged lines
```
+### The residential floor design live load is 40 psf (IBC Table 1607.1); sleeping rooms and certain occupancies use lower or higher values, so confirm the controlling live load before selecting from a span table. Douglas Fir-Larch No. 2 and Southern Pine No. 2 are the common species; both list E = 1,600,000 psi in the NDS Supplement, but their bending values differ, so the span table must match the actual species. {note}
+
+### Joists shall bear not less than 1-1/2 in. on wood or metal and not less than 3 in. on masonry or concrete, except where an engineered hanger or ledger provides bearing.
+
+### Joists framing into a beam, ledger, or header shall be supported by metal joist hangers selected for the joist size and reaction; toe-nailing alone shall not be used to carry a joist reaction.
+
+### See [[sync/hangers-and-supports]] for the metal connector products used at these conditions. {note}
+
## Blocking, bridging, and rim.
…53 unchanged lines
### Sill plates shall be anchored to the foundation with anchor bolts not less than 1/2 in. in diameter embedded not less than 7 in. into concrete or grouted masonry, spaced not more than 6 ft on center, with not less than two bolts per plate piece and a bolt within 12 in. of each plate end (IBC Section 2308.3.1).
−### These are the prescriptive minimums; shear-wall and high-wind or high-seismic conditions tighten them — for example 3/4 in. diameter bolts at shear-wall ends. The anchorage shown on the structural drawings governs where it is more stringent. {note}
−
−### Anchor bolts shall be set with a plate washer of the size required by the drawings between the nut and the sill plate where the wall resists lateral load.
−
−### Cast-in-place (wet-set) anchor bolts shall be the default; post-installed anchors shall be used only where shown and shall be a mechanical or adhesive anchor qualified by a current ICC-ES evaluation report for the substrate and loading.
−
−### Wet-set and post-installed anchors are not interchangeable: post-installed anchors require an ICC-ES report and a separate adhesive or mechanical-anchor specification, and adhesive anchors in tension have edge-distance, embedment, and special-inspection requirements that wet-set bolts do not. {note}
−
```datasheet
label: Sill Anchor Bolt Diameter
…17 unchanged lines
```
+### These are the prescriptive minimums; shear-wall and high-wind or high-seismic conditions tighten them — for example 3/4 in. diameter bolts at shear-wall ends. The anchorage shown on the structural drawings governs where it is more stringent. {note}
+
+### Anchor bolts shall be set with a plate washer of the size required by the drawings between the nut and the sill plate where the wall resists lateral load.
+
+### Cast-in-place (wet-set) anchor bolts shall be the default; post-installed anchors shall be used only where shown and shall be a mechanical or adhesive anchor qualified by a current ICC-ES evaluation report for the substrate and loading.
+
```datasheet
label: Sill Anchor Installation Method
…5 unchanged lines
```
+### Wet-set and post-installed anchors are not interchangeable: post-installed anchors require an ICC-ES report and a separate adhesive or mechanical-anchor specification, and adhesive anchors in tension have edge-distance, embedment, and special-inspection requirements that wet-set bolts do not. {note}
+
## Hold-downs and shear-wall anchorage.
…84 unchanged lines
### Where treated or fire-retardant-treated members are difficult to match later, the Contractor should deliver a documented surplus of each treated grade and size to the Owner for future repairs.