Drafting – Floor/Roof Framing Plans

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View range – cut through walls below (catch doors/windows) extend 6″ above floor level. View settings from template (cut walls hatched, walls in extents light) – show joists of course Tag all beams (with marks) Text note multi-ply beam fastening requirements If hold downs attach to beams below show and…

Revit Families – Structural Columns

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Observations For model lines, Revit appears to draw the most recently-created lines on top in the draw order stack. When a column is seen in projection (not cut), Revit draws column in its entirety regardless of how the View Range is set. There appears to be no way to have…

Revit Families – Door Casing

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All door casing families are controlled through the “Door Casing” shared family. Common instance parameters: Clear Width Clear Height Cut Siding Thickness Default Casing Head Thickness Default Casing Head Width Default Casing Jamb Thickness Default Casing Jamb Width Default Reveal Head Default Reveal Jamb Return Depth Rough Width Rough Height…

Revit Families – Wall Layers

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Measurement Observations Revit correctly reports the thickness of the core layer regardless of orientation. Revit correctly reports the total thickness of the wall regardless of orientation. For measurements spanning from the inside/outside face to the core layer, Revit reports a real measurement (not an imaginary 31/32″ value) regardless of the…

Drafting – Wall Framing Plan

Drafting Standards
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Checklist Exterior dimensions. Interior dimensions. Tag all posts and enhanced opening trimmers. Tag shear walls Note perforated/ftao SWs and how to do them Special note for double sided SWs (2 stage inspection) Note Hold downs linked to details Call out walls that differ from general notes (ex. doubled wall) Call…

Concrete Screw Anchors as Retrofit Anchor Bolts

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This post examines using Concrete Screw Anchors (such as the Simpson Titen HD concrete screw) as a replacement for cast in place anchor bolts in retrofit situations. The IBC includes special provisions for cast in place anchor bolts with at least 7 inches of embedment (among other criteria). See 2021…

Retaining Wall Design

Structural Engineering
Retaining wall design is a highly inexact science that relies on many assumptions and specifications. Some parts of the process are codified, but many of the decisions to be made are based on engineering judgment, informed by past studies, geotechnical references, and sources outside of the building codes (for example,…

Shear Capacities for Wood-Framed Diaphragms

Structural Engineering
Based on SDPWS 2015 (Table 4.2). All specifications based on min. 19/32 floor sheathing, 12″ field nailing. All SDPWS shear values multiplied by 0.5 * (1 – (0.5 – 0.42)) to convert to ASD and adjust for SPF framing. Unblocked shear values show All other Cases / Case 1, in…

Retrofit Straps to Concrete

Structural Engineering
One of the easiest way to tie down shear walls to an existing concrete foundation is with the use of steel straps fastened to the face of a concrete stem wall with concrete screw anchors. Typically we use Simpson’s MST straps for this purpose. Other potential straps include the MSTCM…

Site Plan

PROPERTIES Associated Level: Main Floor (T.O. Sheathing)Orientation: True NorthView Scale: As large as will fit on a sheet (up to ¼” = 1’-0”) Cut Plane: High enough to not cut toposurface, Bottom and view depth = unlimited, top= unlimitedCreate a Plan Region encompassing the building and set cut plane to…