Related illustrations

1842

Beam rotation (twisting)

· p. 332

The illustration shows a built-up wood beam supporting joists and bearing on a concrete column. The beam is rotated out of square, with curved arrows indicating twisting. Its tilted position concentrates contact at the j

0233

Rotational settlement cracks

· p. 38

The illustration shows a two-story house with a gabled roof and a single-story shed-roof addition on its right side. Both structures have foundation walls and projecting footings shown below grade. The addition is tilted

0352

Rotational settlement cracks

· p. 61

The illustration shows a two-story house with a smaller, single-story addition on a separate foundation. The addition is tilted away from the main house, with a downward arrow indicating settlement relative to the house.

0301

Notches or holes not allowed in beams

· p. 49

A cross-sectional illustration shows a wood beam supporting floor joists and bearing on columns at both ends. Near midspan, the beam has a circular drilled hole, a notch in its bottom edge, and a jagged split adjacent to

0296

Continuous beams are stiffer than simple spanned beams

· p. 48

The illustration compares a continuous beam passing over a column with two simple-span beams meeting above a column. Floor joists impose downward loads on both assemblies, while upward arrows indicate support reactions a

0351

Cracking - planes of movement

· p. 61

The illustration shows a masonry-walled building with a hip roof and cracking around the base of an exterior corner. A prominent crack extends across both adjoining wall faces, separating a lower corner section from the

1086

Settled (gap at wall)

· p. 189

The illustration shows a cross section through a masonry wood-burning fireplace and chimney, with a stone veneer fireplace face and mantel shelf. Rotation of the fireplace breast is indicated by a curved arrow, with a ga

0318

Strapping, bridging and blocking

· p. 53

A perspective drawing shows three parallel wood floor joists with examples of strapping, cross-bridging, and solid blocking. Strapping runs across the undersides of the joists, while diagonal cross-bridging forms X-shape