Architectural · A-MF2A7

Hollow Metal Door Frame Anchorage Details

Materials

Concrete Steel Cold-formed Steel Timber / Wood Masonry / CMU Metal (misc.)

Elements

Doors Floors / Slabs Anchors / Embeds

Connections

Base Plate / Anchorage Welded Connection

About this detail

This drawing outlines the anchor specifications and installation requirements for hollow metal door frames set into masonry and metal stud partitions. Masonry openings use adjustable T-strap anchors made from 0.053 inch thick corrugated steel sized 2 inches by 10 inches. Metal stud installations require 0.053 inch thick steel Z-type anchors welded to the frame with two spot welds typically. Anchor counts per jamb vary by frame height: four anchors for frames up to 7 feet 6 inches, five anchors for heights between 7 feet 6 inches and 8 feet, with an additional anchor for every 2 feet or fraction thereof exceeding 8 feet. Double door heads require a minimum of two anchors positioned approximately 12 inches from each jamb. Interior doors receive one floor anchor at each jamb, while exterior doors require frames set 2 inches into a blocked out recess and grouted flush with the floor.

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